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4 months agokselftest/arm64: Try harder to generate different keys during PAC tests
Mark Brown [Mon, 11 Nov 2024 16:18:56 +0000 (16:18 +0000)]
kselftest/arm64: Try harder to generate different keys during PAC tests

We very intermittently see failures in the single_thread_different_keys
PAC test. As noted in the comment in the test the PAC field can be quite
narrow so there is a chance of collisions even with different keys with a
chance of 5% for 7 bit keys, and the potential for narrower keys. The test
tries to avoid this by running repeatedly, but only tries 10 times which
even with a 5% chance of collisions isn't enough.

Increase the number of times we attempt to look for collisions by a factor
of 100, this also affects other tests which are following a similar pattern
with running the test repeatedly and either don't care like with
pac_instruction_not_nop or potentially have the same issue like
exec_sign_all.

The PAC tests are very fast, running in a second or two even in emulation,
so the 100x increased cost is mildly irritating but not a huge issue. The
bulk of the overhead is in the exec_sign_all test which does a fork() and
exec() per iteration.

Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Don't leak pipe fds in pac.exec_sign_all()
Mark Brown [Mon, 11 Nov 2024 16:18:55 +0000 (16:18 +0000)]
kselftest/arm64: Don't leak pipe fds in pac.exec_sign_all()

The PAC exec_sign_all() test spawns some child processes, creating pipes
to be stdin and stdout for the child. It cleans up most of the file
descriptors that are created as part of this but neglects to clean up the
parent end of the child stdin and stdout. Add the missing close() calls.

Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Corrupt P0 in the irritator when testing SSVE
Mark Brown [Thu, 7 Nov 2024 01:39:22 +0000 (01:39 +0000)]
kselftest/arm64: Corrupt P0 in the irritator when testing SSVE

When building for streaming SVE the irritator for SVE skips updates of both
P0 and FFR. While FFR is skipped since it might not be present there is no
reason to skip corrupting P0 so switch to an instruction valid in streaming
mode and move the ifdef.

Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Add FPMR coverage to fp-ptrace
Mark Brown [Tue, 12 Nov 2024 13:08:16 +0000 (13:08 +0000)]
kselftest/arm64: Add FPMR coverage to fp-ptrace

Add coverage for FPMR to fp-ptrace. FPMR can be available independently of
SVE and SME, if SME is supported then FPMR is cleared by entering and
exiting streaming mode. As with other registers we generate random values
to load into the register, we restrict these to bitfields which are always
defined. We also leave bitfields where the valid values are affected by
the set of supported FP8 formats zero to reduce complexity, it is unlikely
that specific bitfields will be affected by ptrace issues.

Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[[email protected]: use REG_FPMR instead of FPMR]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Expand the set of ZA writes fp-ptrace does
Mark Brown [Tue, 12 Nov 2024 13:08:15 +0000 (13:08 +0000)]
kselftest/arm64: Expand the set of ZA writes fp-ptrace does

Currently our test for implementable ZA writes is written in a bit of a
convoluted fashion which excludes all changes where we clear SVCR.SM even
though we can actually support that since changing the vector length resets
SVCR. Make the logic more direct, enabling us to actually run these cases.

Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftets/arm64: Use flag bits for features in fp-ptrace assembler code
Mark Brown [Tue, 12 Nov 2024 13:08:14 +0000 (13:08 +0000)]
kselftets/arm64: Use flag bits for features in fp-ptrace assembler code

The assembler portions of fp-ptrace are passed feature flags by the C code
indicating which architectural features are supported. Currently these use
an entire register for each flag which is wasteful and gets cumbersome as
new flags are added. Switch to using flag bits in a single register to make
things easier to maintain.

No functional change.

Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Enable build of PAC tests with LLVM=1
Mark Brown [Mon, 11 Nov 2024 18:32:58 +0000 (18:32 +0000)]
kselftest/arm64: Enable build of PAC tests with LLVM=1

Currently we don't build the PAC selftests when building with LLVM=1 since
we attempt to test for PAC support in the toolchain before we've set up the
build system to point at LLVM in lib.mk, which has to be one of the last
things in the Makefile.

Since all versions of LLVM supported for use with the kernel have PAC
support we can just sidestep the issue by just assuming PAC is there when
doing a LLVM=1 build.

Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Check that SVCR is 0 in signal handlers
Mark Brown [Wed, 6 Nov 2024 17:07:51 +0000 (17:07 +0000)]
kselftest/arm64: Check that SVCR is 0 in signal handlers

We don't currently validate that we exit streaming mode and clear ZA when
we enter a signal handler. Add simple checks for this in the SSVE and ZA
tests.

Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[[email protected]: Use %lx in fprintf() as uint64_t seems to be unsigned long in glibc]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Fix printf() compiler warnings in the arm64 syscall-abi.c tests
Catalin Marinas [Fri, 8 Nov 2024 13:49:19 +0000 (13:49 +0000)]
kselftest/arm64: Fix printf() compiler warnings in the arm64 syscall-abi.c tests

Fix the incorrect length modifiers in arm64/abi/syscall-abi.c.

Cc: Shuah Khan <[email protected]>
Cc: Mark Brown <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Fix printf() warning in the arm64 MTE prctl() test
Catalin Marinas [Fri, 8 Nov 2024 13:49:18 +0000 (13:49 +0000)]
kselftest/arm64: Fix printf() warning in the arm64 MTE prctl() test

While prctl() returns an 'int', the PR_MTE_TCF_MASK is defined as
unsigned long which results in the larger type following a bitwise 'and'
operation. Cast the printf() argument to 'int'.

Cc: Shuah Khan <[email protected]>
Cc: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Fix printf() compiler warnings in the arm64 fp tests
Catalin Marinas [Fri, 8 Nov 2024 13:49:17 +0000 (13:49 +0000)]
kselftest/arm64: Fix printf() compiler warnings in the arm64 fp tests

Lots of incorrect length modifiers, missing arguments or conversion
specifiers. Fix them.

Cc: Shuah Khan <[email protected]>
Cc: Mark Brown <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Fix build with stricter assemblers
Mark Brown [Fri, 8 Nov 2024 15:20:46 +0000 (15:20 +0000)]
kselftest/arm64: Fix build with stricter assemblers

While some assemblers (including the LLVM assembler I mostly use) will
happily accept SMSTART as an instruction by default others, specifically
gas, require that any architecture extensions be explicitly enabled.
The assembler SME test programs use manually encoded helpers for the new
instructions but no SMSTART helper is defined, only SM and ZA specific
variants.  Unfortunately the irritators that were just added use plain
SMSTART so on stricter assemblers these fail to build:

za-test.S:160: Error: selected processor does not support `smstart'

Switch to using SMSTART ZA via the manually encoded smstart_za macro we
already have defined.

Fixes: d65f27d240bb ("kselftest/arm64: Implement irritators for ZA and ZT")
Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Test signal handler state modification in fp-stress
Mark Brown [Thu, 7 Nov 2024 01:39:25 +0000 (01:39 +0000)]
kselftest/arm64: Test signal handler state modification in fp-stress

Currently in fp-stress we test signal delivery to the test threads by
sending SIGUSR2 which simply counts how many signals are delivered. The
test programs now also all have a SIGUSR1 handler which for the threads
doing userspace testing additionally modifies the floating point register
state in the signal handler, verifying that when we return the saved
register state is restored from the signal context as expected. Switch over
to triggering that to validate that we are restoring as expected.

Acked-by: Mark Rutland <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Provide a SIGUSR1 handler in the kernel mode FP stress test
Mark Brown [Thu, 7 Nov 2024 01:39:24 +0000 (01:39 +0000)]
kselftest/arm64: Provide a SIGUSR1 handler in the kernel mode FP stress test

The other stress test programs provide a SIGUSR1 handler which modifies the
live register state in order to validate that signal context is being
restored during signal return. While we can't usefully do this when testing
kernel mode FP usage provide a handler for SIGUSR1 which just counts the
number of signals like we do for SIGUSR2, allowing fp-stress to treat all
the test programs uniformly.

Acked-by: Mark Rutland <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Implement irritators for ZA and ZT
Mark Brown [Thu, 7 Nov 2024 01:39:23 +0000 (01:39 +0000)]
kselftest/arm64: Implement irritators for ZA and ZT

Currently we don't use the irritator signal in our floating point stress
tests so when we added ZA and ZT stress tests we didn't actually bother
implementing any actual action in the handlers, we just counted the signal
deliveries. In preparation for using the irritators let's implement them,
just trivially SMSTOP and SMSTART to reset all bits in the register to 0.

Acked-by: Mark Rutland <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Remove unused ADRs from irritator handlers
Mark Brown [Thu, 7 Nov 2024 01:39:21 +0000 (01:39 +0000)]
kselftest/arm64: Remove unused ADRs from irritator handlers

The irritator handlers for the fp-stress test programs all use ADR to load
an address into x0 which is then not referenced. Remove these ADRs as they
just cause confusion.

Acked-by: Mark Rutland <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Correct misleading comments on fp-stress irritators
Mark Brown [Thu, 7 Nov 2024 01:39:20 +0000 (01:39 +0000)]
kselftest/arm64: Correct misleading comments on fp-stress irritators

The comments in the handlers for the irritator signal in the test threads
for fp-stress suggest that the irritator will corrupt the register state
observed by the main thread but this is not the case, instead the FPSIMD
and SVE irritators (which are the only ones that are implemented) modify
the current register state which is expected to be overwritten on return
from the handler by the saved register state. Update the comment to reflect
what the handler is actually doing.

Acked-by: Mark Rutland <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Poll less often while waiting for fp-stress children
Mark Brown [Wed, 30 Oct 2024 00:02:03 +0000 (00:02 +0000)]
kselftest/arm64: Poll less often while waiting for fp-stress children

While fp-stress is waiting for children to start it doesn't send any
signals to them so there is no need for it to have as short an epoll()
timeout as it does when the children are all running. We do still want to
have some timeout so that we can log diagnostics about missing children but
this can be relatively large. On emulated platforms the overhead of running
the supervisor process is quite high, especially during the process of
execing the test binaries.

Implement a longer epoll() timeout during the setup phase, using a 5s
timeout while waiting for children and switching  to the signal raise
interval when all the children are started and we start sending signals.

Signed-off-by: Mark Brown <[email protected]>
Acked-by: Will Deacon <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Increase frequency of signal delivery in fp-stress
Mark Brown [Wed, 30 Oct 2024 00:02:02 +0000 (00:02 +0000)]
kselftest/arm64: Increase frequency of signal delivery in fp-stress

Currently we only deliver signals to the processes being tested about once
a second, meaning that the signal code paths are subject to relatively
little stress. Increase this frequency substantially to 25ms intervals,
along with some minor refactoring to make this more readily tuneable and
maintain the 1s logging interval. This interval was chosen based on some
experimentation with emulated platforms to avoid causing so much extra load
that the test starts to run into the 45s limit for selftests or generally
completely disconnect the timeout numbers from the

We could increase this if we moved the signal generation out of the main
supervisor thread, though we should also consider that he percentage of
time that we spend interacting with the floating point state is also a
consideration.

Suggested-by: Mark Rutland <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Acked-by: Will Deacon <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Fix encoding for SVE B16B16 test
Mark Brown [Mon, 28 Oct 2024 20:22:31 +0000 (20:22 +0000)]
kselftest/arm64: Fix encoding for SVE B16B16 test

The test for SVE_B16B16 had a cut'n'paste of a SME instruction, fix it with
a relevant SVE instruction.

Fixes: 44d10c27bd75 ("kselftest/arm64: Add 2023 DPISA hwcap test coverage")
Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Use ksft_perror() to log MTE failures
Mark Brown [Tue, 29 Oct 2024 12:34:21 +0000 (12:34 +0000)]
kselftest/arm64: Use ksft_perror() to log MTE failures

The logging in the allocation helpers variously uses ksft_print_msg() with
very intermittent logging of errno and perror() (which won't produce KTAP
conformant output) when logging the result of API calls that set errno.
Standardise on using the ksft_perror() helper in these cases so that more
information is available should the tests fail.

Signed-off-by: Mark Brown <[email protected]>
Acked-by: Lorenzo Stoakes <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Log fp-stress child startup errors to stdout
Mark Brown [Tue, 22 Oct 2024 23:20:45 +0000 (00:20 +0100)]
kselftest/arm64: Log fp-stress child startup errors to stdout

Currently if we encounter an error between fork() and exec() of a child
process we log the error to stderr. This means that the errors don't get
annotated with the child information which makes diagnostics harder and
means that if we miss the exit signal from the child we can deadlock
waiting for output from the child. Improve robustness and output quality
by logging to stdout instead.

Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
4 months agokselftest/arm64: Fail the overall fp-stress test if any test fails
Mark Brown [Thu, 17 Oct 2024 17:43:31 +0000 (18:43 +0100)]
kselftest/arm64: Fail the overall fp-stress test if any test fails

Currently fp-stress does not report a top level test result if it runs to
completion, it always exits with a return code 0. Use the ksft_finished()
helper to ensure that the exit code for the top level program reports a
failure if any of the individual tests has failed.

Signed-off-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
5 months agokselftest/arm64: mte: fix printf type warnings about longs
Andre Przywara [Fri, 16 Aug 2024 15:32:51 +0000 (16:32 +0100)]
kselftest/arm64: mte: fix printf type warnings about longs

When checking MTE tags, we print some diagnostic messages when the tests
fail. Some variables uses there are "longs", however we only use "%x"
for the format specifier.

Update the format specifiers to "%lx", to match the variable types they
are supposed to print.

Fixes: f3b2a26ca78d ("kselftest/arm64: Verify mte tag inclusion via prctl")
Signed-off-by: Andre Przywara <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
5 months agokselftest/arm64: mte: fix printf type warnings about pointers
Andre Przywara [Fri, 16 Aug 2024 15:32:50 +0000 (16:32 +0100)]
kselftest/arm64: mte: fix printf type warnings about pointers

When printing the value of a pointer, we should not use an integer
format specifier, but the dedicated "%p" instead.

Signed-off-by: Andre Przywara <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
5 months agokselftest/arm64: mte: fix printf type warnings about __u64
Andre Przywara [Fri, 16 Aug 2024 15:32:49 +0000 (16:32 +0100)]
kselftest/arm64: mte: fix printf type warnings about __u64

When printing the signal context's PC, we use a "%lx" format specifier,
which matches the common userland (glibc's) definition of uint64_t as an
"unsigned long". However the structure in question is defined in a
kernel uapi header, which uses a self defined __u64 type, and the arm64
kernel headers define this using "int-ll64.h", so it becomes an
"unsigned long long". This mismatch leads to the usual compiler warning.

The common fix would be to use "PRIx64", but because this is defined by
the userland's toolchain libc headers, it wouldn't match as well. Since
we know the exact type of __u64, just use "%llx" here instead, to silence
this warning.

This also fixes a more severe typo: "$lx" is not a valid format
specifier.

Fixes: 191e678bdc9b ("kselftest/arm64: Log unexpected asynchronous MTE faults")
Signed-off-by: Andre Przywara <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
5 months agokselftest/arm64: mte: use string literal for printf-style functions
Andre Przywara [Fri, 16 Aug 2024 15:32:47 +0000 (16:32 +0100)]
kselftest/arm64: mte: use string literal for printf-style functions

Using pointers for the format specifier strings in printf-style
functions can create potential security problems, as the number of
arguments to be parsed could vary from call to call. Most compilers
consequently warn about those:
"format not a string literal and no format arguments [-Wformat-security]"

If we only want to print a constant string, we can just use a fixed "%s"
format instead, and pass the string as an argument.

Signed-off-by: Andre Przywara <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
5 months agokselftest/arm64: mte: use proper SKIP syntax
Andre Przywara [Fri, 16 Aug 2024 15:32:46 +0000 (16:32 +0100)]
kselftest/arm64: mte: use proper SKIP syntax

If MTE is not available on a system, we detect this early and skip all
the MTE selftests. However this happens before we print the TAP plan, so
tools parsing the TAP output get confused and report an error.

Use the existing ksft_exit_skip() function to handle this, which uses a
dummy plan to work with tools expecting proper TAP syntax, as described
in the TAP specification.

Signed-off-by: Andre Przywara <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
5 months agokselftest/arm64: hwcap: fix f8dp2 cpuinfo name
Andre Przywara [Fri, 16 Aug 2024 15:32:45 +0000 (16:32 +0100)]
kselftest/arm64: hwcap: fix f8dp2 cpuinfo name

The F8DP2 DPISA extension has a separate cpuinfo field, named
accordingly.
Change the erroneously placed name of "f8dp4" to "f8dp2".

Fixes: 44d10c27bd75 ("kselftest/arm64: Add 2023 DPISA hwcap test coverage")
Signed-off-by: Andre Przywara <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
5 months agokselftest/arm64: signal: drop now redundant GNU_SOURCE definition
Andre Przywara [Fri, 16 Aug 2024 15:32:44 +0000 (16:32 +0100)]
kselftest/arm64: signal: drop now redundant GNU_SOURCE definition

The definition of GNU_SOURCE was recently centralised in an upper layer
kselftest Makefile, so the definition in the arm64 signal tests Makefile
is no longer needed. To make things worse, since both definitions are
not strictly identical, the compiler warns about it:
<command-line>: warning: "_GNU_SOURCE" redefined
<command-line>: note: this is the location of the previous definition

Drop the definition in the arm64/signal Makefile.

Fixes: cc937dad85ae ("selftests: centralize -D_GNU_SOURCE= to CFLAGS in lib.mk")
Signed-off-by: Andre Przywara <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
5 months agoLinux 6.12-rc1 v6.12-rc1
Linus Torvalds [Sun, 29 Sep 2024 22:06:19 +0000 (15:06 -0700)]
Linux 6.12-rc1

5 months agox86: kvm: fix build error
Linus Torvalds [Sun, 29 Sep 2024 21:47:33 +0000 (14:47 -0700)]
x86: kvm: fix build error

The cpu_emergency_register_virt_callback() function is used
unconditionally by the x86 kvm code, but it is declared (and defined)
conditionally:

  #if IS_ENABLED(CONFIG_KVM_INTEL) || IS_ENABLED(CONFIG_KVM_AMD)
  void cpu_emergency_register_virt_callback(cpu_emergency_virt_cb *callback);
  ...

leading to a build error when neither KVM_INTEL nor KVM_AMD support is
enabled:

  arch/x86/kvm/x86.c: In function â€˜kvm_arch_enable_virtualization’:
  arch/x86/kvm/x86.c:12517:9: error: implicit declaration of function â€˜cpu_emergency_register_virt_callback’ [-Wimplicit-function-declaration]
  12517 |         cpu_emergency_register_virt_callback(kvm_x86_ops.emergency_disable_virtualization_cpu);
        |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  arch/x86/kvm/x86.c: In function â€˜kvm_arch_disable_virtualization’:
  arch/x86/kvm/x86.c:12522:9: error: implicit declaration of function â€˜cpu_emergency_unregister_virt_callback’ [-Wimplicit-function-declaration]
  12522 |         cpu_emergency_unregister_virt_callback(kvm_x86_ops.emergency_disable_virtualization_cpu);
        |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fix the build by defining empty helper functions the same way the old
cpu_emergency_disable_virtualization() function was dealt with for the
same situation.

Maybe we could instead have made the call sites conditional, since the
callers (kvm_arch_{en,dis}able_virtualization()) have an empty weak
fallback.  I'll leave that to the kvm people to argue about, this at
least gets the build going for that particular config.

Fixes: 590b09b1d88e ("KVM: x86: Register "emergency disable" callbacks when virt is enabled")
Cc: Paolo Bonzini <[email protected]>
Cc: Sean Christopherson <[email protected]>
Cc: Kai Huang <[email protected]>
Cc: Chao Gao <[email protected]>
Cc: Farrah Chen <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
5 months agoMerge tag 'mailbox-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jassibrar...
Linus Torvalds [Sun, 29 Sep 2024 16:53:04 +0000 (09:53 -0700)]
Merge tag 'mailbox-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jassibrar/mailbox

Pull mailbox updates from Jassi Brar:

 - fix kconfig dependencies (mhu-v3, omap2+)

 - use devie name instead of genereic imx_mu_chan as interrupt name
   (imx)

 - enable sa8255p and qcs8300 ipc controllers (qcom)

 - Fix timeout during suspend mode (bcm2835)

 - convert to use use of_property_match_string (mailbox)

 - enable mt8188 (mediatek)

 - use devm_clk_get_enabled helpers (spreadtrum)

 - fix device-id typo (rockchip)

* tag 'mailbox-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jassibrar/mailbox:
  mailbox, remoteproc: omap2+: fix compile testing
  dt-bindings: mailbox: qcom-ipcc: Document QCS8300 IPCC
  dt-bindings: mailbox: qcom-ipcc: document the support for SA8255p
  dt-bindings: mailbox: mtk,adsp-mbox: Add compatible for MT8188
  mailbox: Use of_property_match_string() instead of open-coding
  mailbox: bcm2835: Fix timeout during suspend mode
  mailbox: sprd: Use devm_clk_get_enabled() helpers
  mailbox: rockchip: fix a typo in module autoloading
  mailbox: imx: use device name in interrupt name
  mailbox: ARM_MHU_V3 should depend on ARM64

5 months agoMerge tag 'i2c-for-6.12-rc1-additional_fixes' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Sun, 29 Sep 2024 16:47:33 +0000 (09:47 -0700)]
Merge tag 'i2c-for-6.12-rc1-additional_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:

 - fix DesignWare driver ENABLE-ABORT sequence, ensuring ABORT can
   always be sent when needed

 - check for PCLK in the SynQuacer controller as an optional clock,
   allowing ACPI to directly provide the clock rate

 - KEBA driver Kconfig dependency fix

 - fix XIIC driver power suspend sequence

* tag 'i2c-for-6.12-rc1-additional_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: xiic: Fix pm_runtime_set_suspended() with runtime pm enabled
  i2c: keba: I2C_KEBA should depend on KEBA_CP500
  i2c: synquacer: Deal with optional PCLK correctly
  i2c: designware: fix controller is holding SCL low while ENABLE bit is disabled

5 months agoMerge tag 'dma-mapping-6.12-2024-09-29' of git://git.infradead.org/users/hch/dma...
Linus Torvalds [Sun, 29 Sep 2024 16:35:10 +0000 (09:35 -0700)]
Merge tag 'dma-mapping-6.12-2024-09-29' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping fix from Christoph Hellwig:

 - handle chained SGLs in the new tracing code (Christoph Hellwig)

* tag 'dma-mapping-6.12-2024-09-29' of git://git.infradead.org/users/hch/dma-mapping:
  dma-mapping: fix DMA API tracing for chained scatterlists

5 months agoMerge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sun, 29 Sep 2024 16:22:34 +0000 (09:22 -0700)]
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull more SCSI updates from James Bottomley:
 "These are mostly minor updates.

  There are two drivers (lpfc and mpi3mr) which missed the initial
  pull and a core change to retry a start/stop unit which affect
  suspend/resume"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (32 commits)
  scsi: lpfc: Update lpfc version to 14.4.0.5
  scsi: lpfc: Support loopback tests with VMID enabled
  scsi: lpfc: Revise TRACE_EVENT log flag severities from KERN_ERR to KERN_WARNING
  scsi: lpfc: Ensure DA_ID handling completion before deleting an NPIV instance
  scsi: lpfc: Fix kref imbalance on fabric ndlps from dev_loss_tmo handler
  scsi: lpfc: Restrict support for 32 byte CDBs to specific HBAs
  scsi: lpfc: Update phba link state conditional before sending CMF_SYNC_WQE
  scsi: lpfc: Add ELS_RSP cmd to the list of WQEs to flush in lpfc_els_flush_cmd()
  scsi: mpi3mr: Update driver version to 8.12.0.0.50
  scsi: mpi3mr: Improve wait logic while controller transitions to READY state
  scsi: mpi3mr: Update MPI Headers to revision 34
  scsi: mpi3mr: Use firmware-provided timestamp update interval
  scsi: mpi3mr: Enhance the Enable Controller retry logic
  scsi: sd: Fix off-by-one error in sd_read_block_characteristics()
  scsi: pm8001: Do not overwrite PCI queue mapping
  scsi: scsi_debug: Remove a useless memset()
  scsi: pmcraid: Convert comma to semicolon
  scsi: sd: Retry START STOP UNIT commands
  scsi: mpi3mr: A performance fix
  scsi: ufs: qcom: Update MODE_MAX cfg_bw value
  ...

5 months agoMerge tag 'bcachefs-2024-09-28' of git://evilpiepirate.org/bcachefs
Linus Torvalds [Sun, 29 Sep 2024 16:17:44 +0000 (09:17 -0700)]
Merge tag 'bcachefs-2024-09-28' of git://evilpiepirate.org/bcachefs

Pull more bcachefs updates from Kent Overstreet:
 "Assorted minor syzbot fixes, and for bigger stuff:

  Fix two disk accounting rewrite bugs:

   - Disk accounting keys use the version field of bkey so that journal
     replay can tell which updates have been applied to the btree.

     This is set in the transaction commit path, after we've gotten our
     journal reservation (and our time ordering), but the
     BCH_TRANS_COMMIT_skip_accounting_apply flag that journal replay
     uses was incorrectly skipping this for new updates generated prior
     to journal replay.

     This fixes the underlying cause of an assertion pop in
     disk_accounting_read.

   - A couple of fixes for disk accounting + device removal.

     Checking if acocunting replicas entries were marked in the
     superblock was being done at the wrong point, when deltas in the
     journal could still zero them out, and then additionally we'd try
     to add a missing replicas entry to the superblock without checking
     if it referred to an invalid (removed) device.

  A whole slew of repair fixes:

   - fix infinite loop in propagate_key_to_snapshot_leaves(), this fixes
     an infinite loop when repairing a filesystem with many snapshots

   - fix incorrect transaction restart handling leading to occasional
     "fsck counted ..." warnings

   - fix warning in __bch2_fsck_err() for bkey fsck errors

   - check_inode() in fsck now correctly checks if the filesystem was
     clean

   - there shouldn't be pending logged ops if the fs was clean, we now
     check for this

   - remove_backpointer() doesn't remove a dirent that doesn't actually
     point to the inode

   - many more fsck errors are AUTOFIX"

* tag 'bcachefs-2024-09-28' of git://evilpiepirate.org/bcachefs: (35 commits)
  bcachefs: check_subvol_path() now prints subvol root inode
  bcachefs: remove_backpointer() now checks if dirent points to inode
  bcachefs: dirent_points_to_inode() now warns on mismatch
  bcachefs: Fix lost wake up
  bcachefs: Check for logged ops when clean
  bcachefs: BCH_FS_clean_recovery
  bcachefs: Convert disk accounting BUG_ON() to WARN_ON()
  bcachefs: Fix BCH_TRANS_COMMIT_skip_accounting_apply
  bcachefs: Check for accounting keys with bversion=0
  bcachefs: rename version -> bversion
  bcachefs: Don't delete unlinked inodes before logged op resume
  bcachefs: Fix BCH_SB_ERRS() so we can reorder
  bcachefs: Fix fsck warnings from bkey validation
  bcachefs: Move transaction commit path validation to as late as possible
  bcachefs: Fix disk accounting attempting to mark invalid replicas entry
  bcachefs: Fix unlocked access to c->disk_sb.sb in bch2_replicas_entry_validate()
  bcachefs: Fix accounting read + device removal
  bcachefs: bch_accounting_mode
  bcachefs: fix transaction restart handling in check_extents(), check_dirents()
  bcachefs: kill inode_walker_entry.seen_this_pos
  ...

5 months agoMerge tag 'x86-urgent-2024-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 29 Sep 2024 16:10:00 +0000 (09:10 -0700)]
Merge tag 'x86-urgent-2024-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "Fix TDX MMIO #VE fault handling, and add two new Intel model numbers
  for 'Pantherlake' and 'Diamond Rapids'"

* tag 'x86-urgent-2024-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu: Add two Intel CPU model numbers
  x86/tdx: Fix "in-kernel MMIO" check

5 months agoMerge tag 'locking-urgent-2024-09-29' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 29 Sep 2024 15:51:30 +0000 (08:51 -0700)]
Merge tag 'locking-urgent-2024-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:
 "lockdep:
    - Fix potential deadlock between lockdep and RCU (Zhiguo Niu)
    - Use str_plural() to address Coccinelle warning (Thorsten Blum)
    - Add debuggability enhancement (Luis Claudio R. Goncalves)

  static keys & calls:
    - Fix static_key_slow_dec() yet again (Peter Zijlstra)
    - Handle module init failure correctly in static_call_del_module()
      (Thomas Gleixner)
    - Replace pointless WARN_ON() in static_call_module_notify() (Thomas
      Gleixner)

  <linux/cleanup.h>:
    - Add usage and style documentation (Dan Williams)

  rwsems:
    - Move is_rwsem_reader_owned() and rwsem_owner() under
      CONFIG_DEBUG_RWSEMS (Waiman Long)

  atomic ops, x86:
    - Redeclare x86_32 arch_atomic64_{add,sub}() as void (Uros Bizjak)
    - Introduce the read64_nonatomic macro to x86_32 with cx8 (Uros
      Bizjak)"

Signed-off-by: Ingo Molnar <[email protected]>
* tag 'locking-urgent-2024-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/rwsem: Move is_rwsem_reader_owned() and rwsem_owner() under CONFIG_DEBUG_RWSEMS
  jump_label: Fix static_key_slow_dec() yet again
  static_call: Replace pointless WARN_ON() in static_call_module_notify()
  static_call: Handle module init failure correctly in static_call_del_module()
  locking/lockdep: Simplify character output in seq_line()
  lockdep: fix deadlock issue between lockdep and rcu
  lockdep: Use str_plural() to fix Coccinelle warning
  cleanup: Add usage and style documentation
  lockdep: suggest the fix for "lockdep bfs error:-1" on print_bfs_bug
  locking/atomic/x86: Redeclare x86_32 arch_atomic64_{add,sub}() as void
  locking/atomic/x86: Introduce the read64_nonatomic macro to x86_32 with cx8

5 months agoMerge tag 'cocci-for-6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall...
Linus Torvalds [Sun, 29 Sep 2024 15:44:28 +0000 (08:44 -0700)]
Merge tag 'cocci-for-6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux

Pull coccinelle updates from Julia Lawall:
 "Extend string_choices.cocci to use more available helpers

  Ten patches from Hongbo Li extending string_choices.cocci with the
  complete set of functions offered by include/linux/string_choices.h.

  One patch from myself reducing the number of redundant cases that are
  checked by Coccinelle, giving a small performance improvement"

* tag 'cocci-for-6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux:
  Reduce Coccinelle choices in string_choices.cocci
  coccinelle: Remove unnecessary parentheses for only one possible change.
  coccinelle: Add rules to find str_yes_no() replacements
  coccinelle: Add rules to find str_on_off() replacements
  coccinelle: Add rules to find str_write_read() replacements
  coccinelle: Add rules to find str_read_write() replacements
  coccinelle: Add rules to find str_enable{d}_disable{d}() replacements
  coccinelle: Add rules to find str_lo{w}_hi{gh}() replacements
  coccinelle: Add rules to find str_hi{gh}_lo{w}() replacements
  coccinelle: Add rules to find str_false_true() replacements
  coccinelle: Add rules to find str_true_false() replacements

5 months agoMerge tag 'linux_kselftest-next-6.12-rc1-fixes' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Sun, 29 Sep 2024 15:37:03 +0000 (08:37 -0700)]
Merge tag 'linux_kselftest-next-6.12-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest fix from Shuah Khan:
 "One urgent fix to vDSO as automated testing is failing due to this
  bug"

* tag 'linux_kselftest-next-6.12-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests: vDSO: align stack for O2-optimized memcpy

5 months agoMerge branch 'locking/core' into locking/urgent, to pick up pending commits
Ingo Molnar [Sun, 29 Sep 2024 06:57:18 +0000 (08:57 +0200)]
Merge branch 'locking/core' into locking/urgent, to pick up pending commits

Merge all pending locking commits into a single branch.

Signed-off-by: Ingo Molnar <[email protected]>
5 months agoReduce Coccinelle choices in string_choices.cocci
Julia Lawall [Sat, 28 Sep 2024 19:26:22 +0000 (21:26 +0200)]
Reduce Coccinelle choices in string_choices.cocci

The isomorphism neg_if_exp negates the test of a ?: conditional,
making it unnecessary to have an explicit case for a negated test
with the branches inverted.

At the same time, we can disable neg_if_exp in cases where a
different API function may be more suitable for a negated test.

Finally, in the non-patch cases, E matches an expression with
parentheses around it, so there is no need to mention ()
explicitly in the pattern.  The () are still needed in the patch
cases, because we want to drop them, if they are present.

Signed-off-by: Julia Lawall <[email protected]>
5 months agococcinelle: Remove unnecessary parentheses for only one possible change.
Hongbo Li [Wed, 11 Sep 2024 01:09:27 +0000 (09:09 +0800)]
coccinelle: Remove unnecessary parentheses for only one possible change.

The parentheses are only needed if there is a disjunction, ie a
set of possible changes. If there is only one pattern, we can
remove these parentheses. Just like the format:

  -  x
  +  y

not:

  (
  -  x
  +  y
  )

Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Julia Lawall <[email protected]>
5 months agococcinelle: Add rules to find str_yes_no() replacements
Hongbo Li [Wed, 11 Sep 2024 01:09:26 +0000 (09:09 +0800)]
coccinelle: Add rules to find str_yes_no() replacements

As other rules done, we add rules for str_yes_no()
to check the relative opportunities.

Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Julia Lawall <[email protected]>
5 months agococcinelle: Add rules to find str_on_off() replacements
Hongbo Li [Wed, 11 Sep 2024 01:09:25 +0000 (09:09 +0800)]
coccinelle: Add rules to find str_on_off() replacements

As other rules done, we add rules for str_on_off()
to check the relative opportunities.

Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Julia Lawall <[email protected]>
5 months agococcinelle: Add rules to find str_write_read() replacements
Hongbo Li [Wed, 11 Sep 2024 01:09:24 +0000 (09:09 +0800)]
coccinelle: Add rules to find str_write_read() replacements

As other rules done, we add rules for str_write_read()
to check the relative opportunities.

Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Julia Lawall <[email protected]>
5 months agococcinelle: Add rules to find str_read_write() replacements
Hongbo Li [Wed, 11 Sep 2024 01:09:23 +0000 (09:09 +0800)]
coccinelle: Add rules to find str_read_write() replacements

As other rules done, we add rules for str_read_write()
to check the relative opportunities.

Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Julia Lawall <[email protected]>
5 months agococcinelle: Add rules to find str_enable{d}_disable{d}() replacements
Hongbo Li [Wed, 11 Sep 2024 01:09:22 +0000 (09:09 +0800)]
coccinelle: Add rules to find str_enable{d}_disable{d}() replacements

As other rules done, we add rules for str_enable{d}_
disable{d}() to check the relative opportunities.

Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Julia Lawall <[email protected]>
5 months agococcinelle: Add rules to find str_lo{w}_hi{gh}() replacements
Hongbo Li [Wed, 11 Sep 2024 01:09:21 +0000 (09:09 +0800)]
coccinelle: Add rules to find str_lo{w}_hi{gh}() replacements

As other rules done, we add rules for str_lo{w}_hi{gh}()
to check the relative opportunities.

Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Julia Lawall <[email protected]>
5 months agococcinelle: Add rules to find str_hi{gh}_lo{w}() replacements
Hongbo Li [Wed, 11 Sep 2024 01:09:20 +0000 (09:09 +0800)]
coccinelle: Add rules to find str_hi{gh}_lo{w}() replacements

As other rules done, we add rules for str_hi{gh}_lo{w}()
to check the relative opportunities.

Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Julia Lawall <[email protected]>
5 months agococcinelle: Add rules to find str_false_true() replacements
Hongbo Li [Wed, 11 Sep 2024 01:09:19 +0000 (09:09 +0800)]
coccinelle: Add rules to find str_false_true() replacements

As done with str_true_false(), add checks for str_false_true()
opportunities. A simple test can find over 9 cases currently
exist in the tree.

Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Julia Lawall <[email protected]>
5 months agococcinelle: Add rules to find str_true_false() replacements
Hongbo Li [Wed, 11 Sep 2024 01:09:18 +0000 (09:09 +0800)]
coccinelle: Add rules to find str_true_false() replacements

After str_true_false() has been introduced in the tree,
we can add rules for finding places where str_true_false()
can be used. A simple test can find over 10 locations.

Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Julia Lawall <[email protected]>
5 months agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sat, 28 Sep 2024 16:20:14 +0000 (09:20 -0700)]
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull x86 kvm updates from Paolo Bonzini:
 "x86:

   - KVM currently invalidates the entirety of the page tables, not just
     those for the memslot being touched, when a memslot is moved or
     deleted.

     This does not traditionally have particularly noticeable overhead,
     but Intel's TDX will require the guest to re-accept private pages
     if they are dropped from the secure EPT, which is a non starter.

     Actually, the only reason why this is not already being done is a
     bug which was never fully investigated and caused VM instability
     with assigned GeForce GPUs, so allow userspace to opt into the new
     behavior.

   - Advertise AVX10.1 to userspace (effectively prep work for the
     "real" AVX10 functionality that is on the horizon)

   - Rework common MSR handling code to suppress errors on userspace
     accesses to unsupported-but-advertised MSRs

     This will allow removing (almost?) all of KVM's exemptions for
     userspace access to MSRs that shouldn't exist based on the vCPU
     model (the actual cleanup is non-trivial future work)

   - Rework KVM's handling of x2APIC ICR, again, because AMD (x2AVIC)
     splits the 64-bit value into the legacy ICR and ICR2 storage,
     whereas Intel (APICv) stores the entire 64-bit value at the ICR
     offset

   - Fix a bug where KVM would fail to exit to userspace if one was
     triggered by a fastpath exit handler

   - Add fastpath handling of HLT VM-Exit to expedite re-entering the
     guest when there's already a pending wake event at the time of the
     exit

   - Fix a WARN caused by RSM entering a nested guest from SMM with
     invalid guest state, by forcing the vCPU out of guest mode prior to
     signalling SHUTDOWN (the SHUTDOWN hits the VM altogether, not the
     nested guest)

   - Overhaul the "unprotect and retry" logic to more precisely identify
     cases where retrying is actually helpful, and to harden all retry
     paths against putting the guest into an infinite retry loop

   - Add support for yielding, e.g. to honor NEED_RESCHED, when zapping
     rmaps in the shadow MMU

   - Refactor pieces of the shadow MMU related to aging SPTEs in
     prepartion for adding multi generation LRU support in KVM

   - Don't stuff the RSB after VM-Exit when RETPOLINE=y and AutoIBRS is
     enabled, i.e. when the CPU has already flushed the RSB

   - Trace the per-CPU host save area as a VMCB pointer to improve
     readability and cleanup the retrieval of the SEV-ES host save area

   - Remove unnecessary accounting of temporary nested VMCB related
     allocations

   - Set FINAL/PAGE in the page fault error code for EPT violations if
     and only if the GVA is valid. If the GVA is NOT valid, there is no
     guest-side page table walk and so stuffing paging related metadata
     is nonsensical

   - Fix a bug where KVM would incorrectly synthesize a nested VM-Exit
     instead of emulating posted interrupt delivery to L2

   - Add a lockdep assertion to detect unsafe accesses of vmcs12
     structures

   - Harden eVMCS loading against an impossible NULL pointer deref
     (really truly should be impossible)

   - Minor SGX fix and a cleanup

   - Misc cleanups

  Generic:

   - Register KVM's cpuhp and syscore callbacks when enabling
     virtualization in hardware, as the sole purpose of said callbacks
     is to disable and re-enable virtualization as needed

   - Enable virtualization when KVM is loaded, not right before the
     first VM is created

     Together with the previous change, this simplifies a lot the logic
     of the callbacks, because their very existence implies
     virtualization is enabled

   - Fix a bug that results in KVM prematurely exiting to userspace for
     coalesced MMIO/PIO in many cases, clean up the related code, and
     add a testcase

   - Fix a bug in kvm_clear_guest() where it would trigger a buffer
     overflow _if_ the gpa+len crosses a page boundary, which thankfully
     is guaranteed to not happen in the current code base. Add WARNs in
     more helpers that read/write guest memory to detect similar bugs

  Selftests:

   - Fix a goof that caused some Hyper-V tests to be skipped when run on
     bare metal, i.e. NOT in a VM

   - Add a regression test for KVM's handling of SHUTDOWN for an SEV-ES
     guest

   - Explicitly include one-off assets in .gitignore. Past Sean was
     completely wrong about not being able to detect missing .gitignore
     entries

   - Verify userspace single-stepping works when KVM happens to handle a
     VM-Exit in its fastpath

   - Misc cleanups"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (127 commits)
  Documentation: KVM: fix warning in "make htmldocs"
  s390: Enable KVM_S390_UCONTROL config in debug_defconfig
  selftests: kvm: s390: Add VM run test case
  KVM: SVM: let alternatives handle the cases when RSB filling is required
  KVM: VMX: Set PFERR_GUEST_{FINAL,PAGE}_MASK if and only if the GVA is valid
  KVM: x86/mmu: Use KVM_PAGES_PER_HPAGE() instead of an open coded equivalent
  KVM: x86/mmu: Add KVM_RMAP_MANY to replace open coded '1' and '1ul' literals
  KVM: x86/mmu: Fold mmu_spte_age() into kvm_rmap_age_gfn_range()
  KVM: x86/mmu: Morph kvm_handle_gfn_range() into an aging specific helper
  KVM: x86/mmu: Honor NEED_RESCHED when zapping rmaps and blocking is allowed
  KVM: x86/mmu: Add a helper to walk and zap rmaps for a memslot
  KVM: x86/mmu: Plumb a @can_yield parameter into __walk_slot_rmaps()
  KVM: x86/mmu: Move walk_slot_rmaps() up near for_each_slot_rmap_range()
  KVM: x86/mmu: WARN on MMIO cache hit when emulating write-protected gfn
  KVM: x86/mmu: Detect if unprotect will do anything based on invalid_list
  KVM: x86/mmu: Subsume kvm_mmu_unprotect_page() into the and_retry() version
  KVM: x86: Rename reexecute_instruction()=>kvm_unprotect_and_retry_on_failure()
  KVM: x86: Update retry protection fields when forcing retry on emulation failure
  KVM: x86: Apply retry protection to "unprotect on failure" path
  KVM: x86: Check EMULTYPE_WRITE_PF_TO_SP before unprotecting gfn
  ...

5 months agoMerge tag 's390-6.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Sat, 28 Sep 2024 16:11:46 +0000 (09:11 -0700)]
Merge tag 's390-6.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Vasily Gorbik:

 - Clean up and improve vdso code: use SYM_* macros for function and
   data annotations, add CFI annotations to fix GDB unwinding, optimize
   the chacha20 implementation

 - Add vfio-ap driver feature advertisement for use by libvirt and
   mdevctl

* tag 's390-6.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/vfio-ap: Driver feature advertisement
  s390/vdso: Use one large alternative instead of an alternative branch
  s390/vdso: Use SYM_DATA_START_LOCAL()/SYM_DATA_END() for data objects
  tools: Add additional SYM_*() stubs to linkage.h
  s390/vdso: Use macros for annotation of asm functions
  s390/vdso: Add CFI annotations to __arch_chacha20_blocks_nostack()
  s390/vdso: Fix comment within __arch_chacha20_blocks_nostack()
  s390/vdso: Get rid of permutation constants

5 months agoMerge tag 'modules-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof...
Linus Torvalds [Sat, 28 Sep 2024 16:06:15 +0000 (09:06 -0700)]
Merge tag 'modules-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux

Pull module updates from Luis Chamberlain:
 "There are a few fixes / cleanups from Vincent, Chunhui, and Petr, but
  the most important part of this pull request is the Rust community
  stepping up to help maintain both C / Rust code for future Rust module
  support. We grow the set of modules maintainers by three now, and with
  this hope to scale to help address what's needed to properly support
  future Rust module support.

  A lot of exciting stuff coming in future kernel releases.

  This has been on linux-next for ~ 3 weeks now with no issues"

* tag 'modules-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux:
  module: Refine kmemleak scanned areas
  module: abort module loading when sysfs setup suffer errors
  MAINTAINERS: scale modules with more reviewers
  module: Clean up the description of MODULE_SIG_<type>
  module: Split modules_install compression and in-kernel decompression

5 months agoMerge tag 'fbdev-for-6.12-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 28 Sep 2024 16:00:38 +0000 (09:00 -0700)]
Merge tag 'fbdev-for-6.12-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev

Pull fbdev fixes from Helge Deller:

 - crash fix in fbcon_putcs

 - avoid a possible string memory overflow in sisfb

 - minor code optimizations in omapfb and fbcon

* tag 'fbdev-for-6.12-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
  fbdev: sisfb: Fix strbuf array overflow
  fbcon: break earlier in search_fb_in_map and search_for_mapped_con
  fbdev: omapfb: Call of_node_put(ep) only once in omapdss_of_find_source_for_first_ep()
  fbcon: Fix a NULL pointer dereference issue in fbcon_putcs

5 months agoMerge tag 'drm-next-2024-09-28' of https://gitlab.freedesktop.org/drm/kernel
Linus Torvalds [Sat, 28 Sep 2024 15:47:46 +0000 (08:47 -0700)]
Merge tag 'drm-next-2024-09-28' of https://gitlab.freedesktop.org/drm/kernel

Pull drm fixes from Dave Airlie:
 "Regular fixes for the week to end the merge window, i915 and xe have a
  few each, amdgpu makes up most of it with a bunch of SR-IOV related
  fixes amongst others.

  i915:
   - Fix BMG support to UHBR13.5
   - Two PSR fixes
   - Fix colorimetry detection for DP

  xe:
   - Fix macro for checking minimum GuC version
   - Fix CCS offset calculation for some BMG SKUs
   - Fix locking on memory usage reporting via fdinfo and BO destroy
   - Fix GPU page fault handler on a closed VM
   - Fix overflow in oa batch buffer

  amdgpu:
   - MES 12 fix
   - KFD fence sync fix
   - SR-IOV fixes
   - VCN 4.0.6 fix
   - SDMA 7.x fix
   - Bump driver version to note cleared VRAM support
   - SWSMU fix
   - CU occupancy logic fix
   - SDMA queue fix"

* tag 'drm-next-2024-09-28' of https://gitlab.freedesktop.org/drm/kernel: (79 commits)
  drm/amd/pm: update workload mask after the setting
  drm/amdgpu: bump driver version for cleared VRAM
  drm/amdgpu: fix vbios fetching for SR-IOV
  drm/amdgpu: fix PTE copy corruption for sdma 7
  drm/amdkfd: Add SDMA queue quantum support for GFX12
  drm/amdgpu/vcn: enable AV1 on both instances
  drm/amdkfd: Fix CU occupancy for GFX 9.4.3
  drm/amdkfd: Update logic for CU occupancy calculations
  drm/amdgpu: skip coredump after job timeout in SRIOV
  drm/amdgpu: sync to KFD fences before clearing PTEs
  drm/amdgpu/mes12: set enable_level_process_quantum_check
  drm/i915/dp: Fix colorimetry detection
  drm/amdgpu/mes12: reduce timeout
  drm/amdgpu/mes11: reduce timeout
  drm/amdgpu: use GEM references instead of TTMs v2
  drm/amd/display: Allow backlight to go below `AMDGPU_DM_DEFAULT_MIN_BACKLIGHT`
  drm/amd/display: Fix kdoc entry for 'tps' in 'dc_process_dmub_dpia_set_tps_notification'
  drm/amdgpu: update golden regs for gfx12
  drm/amdgpu: clean up vbios fetching code
  drm/amd/display: handle nulled pipe context in DCE110's set_drr()
  ...

5 months agoMerge tag 'ceph-for-6.12-rc1' of https://github.com/ceph/ceph-client
Linus Torvalds [Sat, 28 Sep 2024 15:40:36 +0000 (08:40 -0700)]
Merge tag 'ceph-for-6.12-rc1' of https://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "Three CephFS fixes from Xiubo and Luis and a bunch of assorted
  cleanups"

* tag 'ceph-for-6.12-rc1' of https://github.com/ceph/ceph-client:
  ceph: remove the incorrect Fw reference check when dirtying pages
  ceph: Remove empty definition in header file
  ceph: Fix typo in the comment
  ceph: fix a memory leak on cap_auths in MDS client
  ceph: flush all caps releases when syncing the whole filesystem
  ceph: rename ceph_flush_cap_releases() to ceph_flush_session_cap_releases()
  libceph: use min() to simplify code in ceph_dns_resolve_name()
  ceph: Convert to use jiffies macro
  ceph: Remove unused declarations

5 months agoMerge tag 'v6.12-rc-ksmbd-server-fixes' of git://git.samba.org/ksmbd
Linus Torvalds [Sat, 28 Sep 2024 15:35:21 +0000 (08:35 -0700)]
Merge tag 'v6.12-rc-ksmbd-server-fixes' of git://git.samba.org/ksmbd

Pull smb server fixes from Steve French:

 - fix querying dentry for char/block special files

 - small cleanup patches

* tag 'v6.12-rc-ksmbd-server-fixes' of git://git.samba.org/ksmbd:
  ksmbd: Correct typos in multiple comments across various files
  ksmbd: fix open failure from block and char device file
  ksmbd: remove unsafe_memcpy use in session setup
  ksmbd: Replace one-element arrays with flexible-array members
  ksmbd: fix warning: comparison of distinct pointer types lacks a cast

5 months agoMerge tag '6.12rc-more-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sat, 28 Sep 2024 15:30:27 +0000 (08:30 -0700)]
Merge tag '6.12rc-more-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull xmb client fixes from Steve French:

 - Noisy log message cleanup

 - Important netfs fix for cifs crash in generic/074

 - Three minor improvements to use of hashing (multichannel and mount
   improvements)

 - Fix decryption crash for large read with small esize

* tag '6.12rc-more-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  smb: client: make SHA-512 TFM ephemeral
  smb: client: make HMAC-MD5 TFM ephemeral
  smb: client: stop flooding dmesg in smb2_calc_signature()
  smb: client: allocate crypto only for primary server
  smb: client: fix UAF in async decryption
  netfs: Fix write oops in generic/346 (9p) and generic/074 (cifs)

5 months agobcachefs: check_subvol_path() now prints subvol root inode
Kent Overstreet [Tue, 24 Sep 2024 02:32:47 +0000 (22:32 -0400)]
bcachefs: check_subvol_path() now prints subvol root inode

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: remove_backpointer() now checks if dirent points to inode
Kent Overstreet [Tue, 24 Sep 2024 02:27:13 +0000 (22:27 -0400)]
bcachefs: remove_backpointer() now checks if dirent points to inode

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: dirent_points_to_inode() now warns on mismatch
Kent Overstreet [Tue, 24 Sep 2024 02:22:00 +0000 (22:22 -0400)]
bcachefs: dirent_points_to_inode() now warns on mismatch

if an inode backpointer points to a dirent that doesn't point back,
that's an error we should warn about.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Fix lost wake up
Alan Huang [Tue, 27 Aug 2024 15:14:48 +0000 (23:14 +0800)]
bcachefs: Fix lost wake up

If the reader acquires the read lock and then the writer enters the slow
path, while the reader proceeds to the unlock path, the following scenario
can occur without the change:

writer: pcpu_read_count(lock) return 1 (so __do_six_trylock will return 0)
reader: this_cpu_dec(*lock->readers)
reader: smp_mb()
reader: state = atomic_read(&lock->state) (there is no waiting flag set)
writer: six_set_bitmask()

then the writer will sleep forever.

Signed-off-by: Alan Huang <[email protected]>
Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Check for logged ops when clean
Kent Overstreet [Thu, 26 Sep 2024 20:23:30 +0000 (16:23 -0400)]
bcachefs: Check for logged ops when clean

If we shut down successfully, there shouldn't be any logged ops to
resume.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: BCH_FS_clean_recovery
Kent Overstreet [Thu, 26 Sep 2024 20:19:58 +0000 (16:19 -0400)]
bcachefs: BCH_FS_clean_recovery

Add a filesystem flag to indicate whether we did a clean recovery -
using c->sb.clean after we've got rw is incorrect, since c->sb is
updated whenever we write the superblock.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Convert disk accounting BUG_ON() to WARN_ON()
Kent Overstreet [Sat, 28 Sep 2024 01:05:59 +0000 (21:05 -0400)]
bcachefs: Convert disk accounting BUG_ON() to WARN_ON()

We had a bug where disk accounting keys didn't always have their version
field set in journal replay; change the BUG_ON() to a WARN(), and
exclude this case since it's now checked for elsewhere (in the bkey
validate function).

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Fix BCH_TRANS_COMMIT_skip_accounting_apply
Kent Overstreet [Thu, 26 Sep 2024 19:59:29 +0000 (15:59 -0400)]
bcachefs: Fix BCH_TRANS_COMMIT_skip_accounting_apply

This was added to avoid double-counting accounting keys in journal
replay. But applied incorrectly (easily done since it applies to the
transaction commit, not a particular update), it leads to skipping
in-mem accounting for real accounting updates, and failure to give them
a version number - which leads to journal replay becoming very confused
the next time around.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Check for accounting keys with bversion=0
Kent Overstreet [Thu, 26 Sep 2024 19:58:02 +0000 (15:58 -0400)]
bcachefs: Check for accounting keys with bversion=0

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: rename version -> bversion
Kent Overstreet [Thu, 26 Sep 2024 19:49:17 +0000 (15:49 -0400)]
bcachefs: rename version -> bversion

give bversions a more distinct name, to aid in grepping

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Don't delete unlinked inodes before logged op resume
Kent Overstreet [Thu, 26 Sep 2024 19:19:17 +0000 (15:19 -0400)]
bcachefs: Don't delete unlinked inodes before logged op resume

Previously, check_inode() would delete unlinked inodes if they weren't
on the deleted list - this code dating from before there was a deleted
list.

But, if we crash during a logged op (truncate or finsert/fcollapse) of
an unlinked file, logged op resume will get confused if the inode has
already been deleted - instead, just add it to the deleted list if it
needs to be there; delete_dead_inodes runs after logged op resume.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Fix BCH_SB_ERRS() so we can reorder
Kent Overstreet [Thu, 26 Sep 2024 19:30:17 +0000 (15:30 -0400)]
bcachefs: Fix BCH_SB_ERRS() so we can reorder

BCH_SB_ERRS() has a field for the actual enum val so that we can reorder
to reorganize, but the way BCH_SB_ERR_MAX was defined didn't allow for
this.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Fix fsck warnings from bkey validation
Kent Overstreet [Thu, 26 Sep 2024 20:51:19 +0000 (16:51 -0400)]
bcachefs: Fix fsck warnings from bkey validation

__bch2_fsck_err() warns if the current task has a btree_trans object and
it wasn't passed in, because if it has to prompt for user input it has
to be able to unlock it.

But plumbing the btree_trans through bkey_validate(), as well as
transaction restarts, is problematic - so instead make bkey fsck errors
FSCK_AUTOFIX, which doesn't need to warn.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Move transaction commit path validation to as late as possible
Kent Overstreet [Thu, 26 Sep 2024 20:50:29 +0000 (16:50 -0400)]
bcachefs: Move transaction commit path validation to as late as possible

In order to check for accounting keys with version=0, we need to run
validation after they've been assigned version numbers.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Fix disk accounting attempting to mark invalid replicas entry
Kent Overstreet [Wed, 25 Sep 2024 22:17:52 +0000 (18:17 -0400)]
bcachefs: Fix disk accounting attempting to mark invalid replicas entry

This fixes the following bug, where a disk accounting key has an invalid
replicas entry, and we attempt to add it to the superblock:

bcachefs (3c0860e8-07ca-4276-8954-11c1774be868): starting version 1.12: rebalance_work_acct_fix opts=metadata_replicas=2,data_replicas=2,foreground_target=ssd,background_target=hdd,nopromote_whole_extents,verbose,fsck,fix_errors=yes
bcachefs (3c0860e8-07ca-4276-8954-11c1774be868): recovering from clean shutdown, journal seq 15211644
bcachefs (3c0860e8-07ca-4276-8954-11c1774be868): accounting_read...
accounting not marked in superblock replicas
  replicas cached: 1/1 [0], fixing
bcachefs (3c0860e8-07ca-4276-8954-11c1774be868): sb invalid before write: Invalid superblock section replicas_v0: invalid device 0 in entry cached: 1/1 [0]
replicas_v0 (size 88):
user: 2 [3 5] user: 2 [1 4] cached: 1 [2] btree: 2 [1 2] user: 2 [2 5] cached: 1 [0] cached: 1 [4] journal: 2 [1 5] user: 2 [1 2] user: 2 [2 3] user: 2 [3 4] user: 2 [4 5] cached: 1 [1] cached: 1 [3] cached: 1 [5] journal: 2 [1 2] journal: 2 [2 5] btree: 2 [2 5] user: 2 [1 3] user: 2 [1 5] user: 2 [2 4]

bcachefs (3c0860e8-07ca-4276-8954-11c1774be868): inconsistency detected - emergency read only at journal seq 15211644
accounting not marked in superblock replicas
  replicas user: 1/1 [3], fixing
bcachefs (3c0860e8-07ca-4276-8954-11c1774be868): sb invalid before write: Invalid superblock section replicas_v0: invalid device 0 in entry cached: 1/1 [0]
replicas_v0 (size 96):
user: 2 [3 5] user: 2 [1 3] cached: 1 [2] btree: 2 [1 2] user: 2 [2 4] cached: 1 [0] cached: 1 [4] journal: 2 [1 5] user: 1 [3] user: 2 [1 5] user: 2 [3 4] user: 2 [4 5] cached: 1 [1] cached: 1 [3] cached: 1 [5] journal: 2 [1 2] journal: 2 [2 5] btree: 2 [2 5] user: 2 [1 2] user: 2 [1 4] user: 2 [2 3] user: 2 [2 5]

accounting not marked in superblock replicas
  replicas user: 1/2 [3 7], fixing
bcachefs (3c0860e8-07ca-4276-8954-11c1774be868): sb invalid before write: Invalid superblock section replicas_v0: invalid device 7 in entry user: 1/2 [3 7]
replicas_v0 (size 96):
user: 2 [3 7] user: 2 [1 3] cached: 1 [2] btree: 2 [1 2] user: 2 [2 4] cached: 1 [0] cached: 1 [4] journal: 2 [1 5] user: 1 [3] user: 2 [1 5] user: 2 [3 4] user: 2 [4 5] cached: 1 [1] cached: 1 [3] cached: 1 [5] journal: 2 [1 2] journal: 2 [2 5] btree: 2 [2 5] user: 2 [1 2] user: 2 [1 4] user: 2 [2 3] user: 2 [2 5] user: 2 [3 5]

 done
bcachefs (3c0860e8-07ca-4276-8954-11c1774be868): alloc_read... done
bcachefs (3c0860e8-07ca-4276-8954-11c1774be868): stripes_read... done
bcachefs (3c0860e8-07ca-4276-8954-11c1774be868): snapshots_read... done

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Fix unlocked access to c->disk_sb.sb in bch2_replicas_entry_validate()
Kent Overstreet [Wed, 25 Sep 2024 22:17:31 +0000 (18:17 -0400)]
bcachefs: Fix unlocked access to c->disk_sb.sb in bch2_replicas_entry_validate()

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Fix accounting read + device removal
Kent Overstreet [Wed, 25 Sep 2024 20:46:06 +0000 (16:46 -0400)]
bcachefs: Fix accounting read + device removal

accounting read was checking if accounting replicas entries were marked
in the superblock prior to applying accounting from the journal,
which meant that a recently removed device could spuriously trigger a
"not marked in superblocked" error (when journal entries zero out the
offending counter).

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: bch_accounting_mode
Kent Overstreet [Wed, 25 Sep 2024 02:53:56 +0000 (22:53 -0400)]
bcachefs: bch_accounting_mode

Minor refactoring - replace multiple bool arguments with an enum; prep
work for fixing a bug in accounting read.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: fix transaction restart handling in check_extents(), check_dirents()
Kent Overstreet [Tue, 24 Sep 2024 02:32:58 +0000 (22:32 -0400)]
bcachefs: fix transaction restart handling in check_extents(), check_dirents()

Dealing with outside state within a btree transaction is always tricky.

check_extents() and check_dirents() have to accumulate counters for
i_sectors and i_nlink (for subdirectories). There were two bugs:

- transaction commit may return a restart; therefore we have to commit
  before accumulating to those counters
- get_inode_all_snapshots() may return a transaction restart, before
  updating w->last_pos; then, on the restart,
  check_i_sectors()/check_subdir_count() would see inodes that were not
  for w->last_pos

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: kill inode_walker_entry.seen_this_pos
Kent Overstreet [Tue, 24 Sep 2024 02:29:05 +0000 (22:29 -0400)]
bcachefs: kill inode_walker_entry.seen_this_pos

dead code

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Fix incorrect IS_ERR_OR_NULL usage
Kent Overstreet [Tue, 24 Sep 2024 23:31:22 +0000 (19:31 -0400)]
bcachefs: Fix incorrect IS_ERR_OR_NULL usage

Returning a positive integer instead of an error code causes error paths
to become very confused.

Closes: [email protected]
Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: fix the memory leak in exception case
Hongbo Li [Tue, 24 Sep 2024 01:41:46 +0000 (09:41 +0800)]
bcachefs: fix the memory leak in exception case

The pointer clean points the memory allocated by kmemdup, when the
return value of bch2_sb_clean_validate_late is not zero. The memory
pointed by clean is leaked. So we should free it in this case.

Fixes: a37ad1a3aba9 ("bcachefs: sb-clean.c")
Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: fast exit when darray_make_room failed
Hongbo Li [Tue, 24 Sep 2024 01:42:24 +0000 (09:42 +0800)]
bcachefs: fast exit when darray_make_room failed

In downgrade_table_extra, the return value is needed. When it
return failed, we should exit immediately.

Fixes: 7773df19c35f ("bcachefs: metadata version bucket_stripe_sectors")
Signed-off-by: Hongbo Li <[email protected]>
Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Fix iterator leak in check_subvol()
Kent Overstreet [Tue, 24 Sep 2024 02:05:14 +0000 (22:05 -0400)]
bcachefs: Fix iterator leak in check_subvol()

A couple small error handling fixes

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Add snapshot to bch_inode_unpacked
Kent Overstreet [Tue, 24 Sep 2024 02:06:04 +0000 (22:06 -0400)]
bcachefs: Add snapshot to bch_inode_unpacked

this allows for various cleanups in fsck

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: assign return error when iterating through layout
Diogo Jahchan Koike [Mon, 23 Sep 2024 22:22:14 +0000 (19:22 -0300)]
bcachefs: assign return error when iterating through layout

syzbot reported a null ptr deref in __copy_user [0]

In __bch2_read_super, when a corrupt backup superblock matches the
default opts offset, no error is assigned to ret and the freed superblock
gets through, possibly being assigned as the best sb in bch2_fs_open and
being later dereferenced, causing a fault. Assign EINVALID to ret when
iterating through layout.

[0]: https://syzkaller.appspot.com/bug?extid=18a5c5e8a9c856944876

Reported-by: [email protected]
Closes: https://syzkaller.appspot.com/bug?extid=18a5c5e8a9c856944876
Signed-off-by: Diogo Jahchan Koike <[email protected]>
Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Fix srcu warning in check_topology
Kent Overstreet [Mon, 23 Sep 2024 22:42:39 +0000 (18:42 -0400)]
bcachefs: Fix srcu warning in check_topology

check_topology doesn't need the srcu lock and doesn't use normal btree
transactions - we can just drop the srcu lock.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Fix error path in check_dirent_inode_dirent()
Kent Overstreet [Mon, 23 Sep 2024 22:41:46 +0000 (18:41 -0400)]
bcachefs: Fix error path in check_dirent_inode_dirent()

fsck_err() jumps to the fsck_err label when bailing out; need to make
sure bp_iter was initialized...

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: memset bounce buffer portion to 0 after key_sort_fix_overlapping
Piotr Zalewski [Sun, 22 Sep 2024 15:18:01 +0000 (15:18 +0000)]
bcachefs: memset bounce buffer portion to 0 after key_sort_fix_overlapping

Zero-initialize part of allocated bounce buffer which wasn't touched by
subsequent bch2_key_sort_fix_overlapping to mitigate later uinit-value
use KMSAN bug[1].

After applying the patch reproducer still triggers stack overflow[2] but
it seems unrelated to the uninit-value use warning. After further
investigation it was found that stack overflow occurs because KMSAN adds
too many function calls[3]. Backtrace of where the stack magic number gets
smashed was added as a reply to syzkaller thread[3].

It was confirmed that task's stack magic number gets smashed after the code
path where KSMAN detects uninit-value use is executed, so it can be assumed
that it doesn't contribute in any way to uninit-value use detection.

[1] https://syzkaller.appspot.com/bug?extid=6f655a60d3244d0c6718
[2] https://lore.kernel.org/lkml/66e57e46.050a0220[email protected]
[3] https://lore.kernel.org/all/rVaWgPULej8K7HqMPNIu8kVNyXNjjCiTB-QBtItLFBmk0alH6fV2tk4joVPk97Evnuv4ZRDd8HB5uDCkiFG6u81xKdzDj-KrtIMJSlF6Kt8=@proton.me

Reported-by: [email protected]
Closes: https://syzkaller.appspot.com/bug?extid=6f655a60d3244d0c6718
Fixes: ec4edd7b9d20 ("bcachefs: Prep work for variable size btree node buffers")
Suggested-by: Kent Overstreet <[email protected]>
Signed-off-by: Piotr Zalewski <[email protected]>
Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Improve bch2_is_inode_open() warning message
Kent Overstreet [Mon, 23 Sep 2024 21:33:02 +0000 (17:33 -0400)]
bcachefs: Improve bch2_is_inode_open() warning message

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Add extra padding in bkey_make_mut_noupdate()
Kent Overstreet [Mon, 23 Sep 2024 21:30:59 +0000 (17:30 -0400)]
bcachefs: Add extra padding in bkey_make_mut_noupdate()

This fixes a kasan splat in propagate_key_to_snapshot_leaves() -
varint_decode_fast() does reads (that it never uses) up to 7 bytes past
the end of the integer.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agobcachefs: Mark inode errors as autofix
Kent Overstreet [Mon, 23 Sep 2024 20:40:47 +0000 (16:40 -0400)]
bcachefs: Mark inode errors as autofix

Most or all errors will be autofix in the future, we're currently just
doing the ones that we know are well tested.

Signed-off-by: Kent Overstreet <[email protected]>
5 months agoMerge tag 'amd-drm-fixes-6.12-2024-09-27' of https://gitlab.freedesktop.org/agd5f...
Dave Airlie [Fri, 27 Sep 2024 22:42:46 +0000 (08:42 +1000)]
Merge tag 'amd-drm-fixes-6.12-2024-09-27' of https://gitlab.freedesktop.org/agd5f/linux into drm-next

amd-drm-fixes-6.12-2024-09-27:

amdgpu:
- MES 12 fix
- KFD fence sync fix
- SR-IOV fixes
- VCN 4.0.6 fix
- SDMA 7.x fix
- Bump driver version to note cleared VRAM support
- SWSMU fix

amdgpu:
- CU occupancy logic fix
- SDMA queue fix

Signed-off-by: Dave Airlie <[email protected]>
From: Alex Deucher <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
5 months agofbdev: sisfb: Fix strbuf array overflow
Andrey Shumilin [Fri, 27 Sep 2024 19:34:24 +0000 (22:34 +0300)]
fbdev: sisfb: Fix strbuf array overflow

The values of the variables xres and yres are placed in strbuf.
These variables are obtained from strbuf1.
The strbuf1 array contains digit characters
and a space if the array contains non-digit characters.
Then, when executing sprintf(strbuf, "%ux%ux8", xres, yres);
more than 16 bytes will be written to strbuf.
It is suggested to increase the size of the strbuf array to 24.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Andrey Shumilin <[email protected]>
Signed-off-by: Helge Deller <[email protected]>
5 months agoMerge tag 'pm-6.12-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 27 Sep 2024 20:30:07 +0000 (13:30 -0700)]
Merge tag 'pm-6.12-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "Fix idle states enumeration in the intel_idle driver on platforms
  supporting multiple flavors of the C6 idle state (Artem Bityutskiy)"

* tag 'pm-6.12-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  intel_idle: fix ACPI _CST matching for newer Xeon platforms

5 months agoMerge tag 'uml-for-linus-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 27 Sep 2024 19:48:48 +0000 (12:48 -0700)]
Merge tag 'uml-for-linus-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux

Pull UML updates from Richard Weinberger:

 - Removal of dead code (TT mode leftovers, etc)

 - Fixes for the network vector driver

 - Fixes for time-travel mode

* tag 'uml-for-linus-6.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux:
  um: fix time-travel syscall scheduling hack
  um: Remove outdated asm/sysrq.h header
  um: Remove the declaration of user_thread function
  um: Remove the call to SUBARCH_EXECVE1 macro
  um: Remove unused mm_fd field from mm_id
  um: Remove unused fields from thread_struct
  um: Remove the redundant newpage check in update_pte_range
  um: Remove unused kpte_clear_flush macro
  um: Remove obsoleted declaration for execute_syscall_skas
  user_mode_linux_howto_v2: add VDE vector support in doc
  vector_user: add VDE support
  um: remove ARCH_NO_PREEMPT_DYNAMIC
  um: vector: Fix NAPI budget handling
  um: vector: Replace locks guarding queue depth with atomics
  um: remove variable stack array in os_rcv_fd_msg()

5 months agoovl: fix file leak in ovl_real_fdget_meta()
Amir Goldstein [Fri, 27 Sep 2024 11:54:23 +0000 (13:54 +0200)]
ovl: fix file leak in ovl_real_fdget_meta()

ovl_open_realfile() is wrongly called twice after conversion to
new struct fd.

Fixes: 88a2f6468d01 ("struct fd: representation change")
Reported-by: [email protected]
Signed-off-by: Amir Goldstein <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
5 months agoMerge tag 'random-6.12-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 27 Sep 2024 19:32:06 +0000 (12:32 -0700)]
Merge tag 'random-6.12-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random

Pull more random number generator updates from Jason Donenfeld:

 - Christophe realized that the LoongArch64 instructions could be
   scheduled more similar to how GCC generates code, which Ruoyao
   implemented, for a 5% speedup from basically some rearrangements

 - An update to MAINTAINERS to match the right files

* tag 'random-6.12-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
  LoongArch: vDSO: Tune chacha implementation
  MAINTAINERS: make vDSO getrandom matches more generic

5 months agoMerge tag 'bitmap-for-6.12' of https://github.com/norov/linux
Linus Torvalds [Fri, 27 Sep 2024 19:10:45 +0000 (12:10 -0700)]
Merge tag 'bitmap-for-6.12' of https://github.com/norov/linux

Pull bitmap updates from Yury Norov:

 - switch all bitmamp APIs from inline to __always_inline (Brian Norris)

   The __always_inline series improves on code generation, and now with
   the latest compiler versions is required to avoid compilation
   warnings. It spent enough in my backlog, and I'm thankful to Brian
   Norris for taking over and moving it forward.

 - introduce GENMASK_U128() macro (Anshuman Khandual)

   GENMASK_U128() is a prerequisite needed for arm64 development

* tag 'bitmap-for-6.12' of https://github.com/norov/linux:
  lib/test_bits.c: Add tests for GENMASK_U128()
  uapi: Define GENMASK_U128
  nodemask: Switch from inline to __always_inline
  cpumask: Switch from inline to __always_inline
  bitmap: Switch from inline to __always_inline
  find: Switch from inline to __always_inline

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