Tariq Toukan [Thu, 14 Jan 2021 15:12:15 +0000 (17:12 +0200)]
net: Allow NETIF_F_HW_TLS_TX if IP_CSUM && IPV6_CSUM
Cited patch below blocked the TLS TX device offload unless HW_CSUM
is set. This broke devices that use IP_CSUM && IP6_CSUM.
Here we fix it.
Note that the single HW_TLS_TX feature flag indicates support for
both IPv4/6, hence it should still be disabled in case only one of
(IP_CSUM | IPV6_CSUM) is set.
To make maintainers' lives easier we're trying to nudge people
towards CCing all the relevant folks on patches, in an attempt
to improve review rate. We have a check in patchwork which validates
the CC list against get_maintainers.pl. It's a little awkward, however,
to force people to CC maintainers who we haven't seen on the mailing
list for years. This series removes from maintainers folks who didn't
provide any tag (incl. authoring a patch) in the last 5 years.
To ensure reasonable signal to noise ratio we only considered
MAINTAINERS entries which had more than 100 patches fall under
them in that time period.
All this is purely a process-greasing exercise, I hope nobody
sees this series as an affront. Most folks are moved to CREDITS,
a couple entries are simply removed.
The following inactive maintainers are kept, because they indicated
the intention to come back in the near future:
- Veaceslav Falico (bonding)
- Christian Benvenuti (Cisco drivers)
- Felix Fietkau (mtk-eth)
- Mirko Linder (skge/sky2)
Patches in this series contain report from a script which did
the analysis. Big thanks to Jonathan Corbet for help and writing
the script (although I feel like I used it differently than Jon
may have intended ;)). The output format is thus:
Subsystem $name
Changes $reviewed / $total ($percent%) // how many changes to the subsystem had at least one ack/review
Last activity: $date_of_most_recent_patch
$maintainer/reviewer1:
Author $last_commit_authored_by_the_person $how_many_in_5yrs
Committer $last_committed $how_many
Tags $last_tag_like_review_signoff_etc $how_many
$maintainer/reviewer2:
Author $last_commit_authored_by_the_person $how_many_in_5yrs
Committer $last_committed $how_many
Tags $last_tag_like_review_signoff_etc $how_many
Top reviewers: // Top 3 reviewers (who are not listed in MAINTAINERS)
[$count_of_reviews_and_acks]: $email
INACTIVE MAINTAINER $name // maintainer / reviewer who has done nothing in last 5yrs
Jakub Kicinski [Thu, 14 Jan 2021 01:49:12 +0000 (17:49 -0800)]
MAINTAINERS: dccp: move Gerrit Renker to CREDITS
As far as I can tell we haven't heard from Gerrit for roughly
5 years now. DCCP patch would really benefit from some review.
Gerrit was the last maintainer so mark this entry as orphaned.
Jakub Kicinski [Thu, 14 Jan 2021 01:49:09 +0000 (17:49 -0800)]
MAINTAINERS: ena: remove Zorik Machulsky from reviewers
While ENA has 3 reviewers and 2 maintainers, we mostly see review
tags and comments from the maintainers. While we very much appreciate
Zorik's invovment in the community let's trim the reviewer list
down to folks we've seen tags from.
Eric Dumazet [Wed, 13 Jan 2021 16:18:19 +0000 (08:18 -0800)]
net: avoid 32 x truesize under-estimation for tiny skbs
Both virtio net and napi_get_frags() allocate skbs
with a very small skb->head
While using page fragments instead of a kmalloc backed skb->head might give
a small performance improvement in some cases, there is a huge risk of
under estimating memory usage.
For both GOOD_COPY_LEN and GRO_MAX_HEAD, we can fit at least 32 allocations
per page (order-3 page in x86), or even 64 on PowerPC
We have been tracking OOM issues on GKE hosts hitting tcp_mem limits
but consuming far more memory for TCP buffers than instructed in tcp_mem[2]
Even if we force napi_alloc_skb() to only use order-0 pages, the issue
would still be there on arches with PAGE_SIZE >= 32768
This patch makes sure that small skb head are kmalloc backed, so that
other objects in the slab page can be reused instead of being held as long
as skbs are sitting in socket queues.
Note that we might in the future use the sk_buff napi cache,
instead of going through a more expensive __alloc_skb()
Another idea would be to use separate page sizes depending
on the allocated length (to never have more than 4 frags per page)
I would like to thank Greg Thelen for his precious help on this matter,
analysing crash dumps is always a time consuming task.
Yannick Vignon [Wed, 13 Jan 2021 13:15:57 +0000 (14:15 +0100)]
net: stmmac: fix taprio configuration when base_time is in the past
The Synopsys TSN MAC supports Qbv base times in the past, but only up to a
certain limit. As a result, a taprio qdisc configuration with a small
base time (for example when treating the base time as a simple phase
offset) is not applied by the hardware and silently ignored.
This was observed on an NXP i.MX8MPlus device, but likely affects all
TSN-variants of the MAC.
Fix the issue by making sure the base time is in the future, pushing it by
an integer amount of cycle times if needed. (a similar check is already
done in several other taprio implementations, see for example
drivers/net/ethernet/intel/igc/igc_tsn.c#L116 or
drivers/net/dsa/sja1105/sja1105_ptp.h#L39).
Yannick Vignon [Wed, 13 Jan 2021 13:15:56 +0000 (14:15 +0100)]
net: stmmac: fix taprio schedule configuration
When configuring a 802.1Qbv schedule through the tc taprio qdisc on an NXP
i.MX8MPlus device, the effective cycle time differed from the requested one
by N*96ns, with N number of entries in the Qbv Gate Control List. This is
because the driver was adding a 96ns margin to each interval of the GCL,
apparently to account for the IPG. The problem was observed on NXP
i.MX8MPlus devices but likely affected all devices relying on the same
configuration callback (dwmac 4.00, 4.10, 5.10 variants).
Fix the issue by removing the margins, and simply setup the MAC with the
provided cycle time value. This is the behavior expected by the user-space
API, as altering the Qbv schedule timings would break standards conformance.
This is also the behavior of several other Ethernet MAC implementations
supporting taprio, including the dwxgmac variant of stmmac.
A function has a different name between their prototype
and its kernel-doc markup:
../net/tipc/link.c:2551: warning: expecting prototype for link_reset_stats(). Prototype was for tipc_link_reset_stats() instead
../net/tipc/node.c:1678: warning: expecting prototype for is the general link level function for message sending(). Prototype was for tipc_node_xmit() instead
Jakub Kicinski [Thu, 14 Jan 2021 01:29:47 +0000 (17:29 -0800)]
net: sit: unregister_netdevice on newlink's error path
We need to unregister the netdevice if config failed.
.ndo_uninit takes care of most of the heavy lifting.
This was uncovered by recent commit c269a24ce057 ("net: make
free_netdev() more lenient with unregistering devices").
Previously the partially-initialized device would be left
in the system.
Mark Bloch [Wed, 13 Jan 2021 12:17:03 +0000 (14:17 +0200)]
RDMA/mlx5: Fix wrong free of blue flame register on error
If the allocation of the fast path blue flame register fails, the driver
should free the regular blue flame register allocated a statement above,
not the one that it just failed to allocate.
Aharon Landau [Wed, 13 Jan 2021 12:16:59 +0000 (14:16 +0200)]
RDMA/umem: Avoid undefined behavior of rounddown_pow_of_two()
rounddown_pow_of_two() is undefined when the input is 0. Therefore we need
to avoid it in ib_umem_find_best_pgsz and return 0. Otherwise, it could
result in not rejecting an invalid page size which eventually causes a
kernel oops due to the logical inconsistency.
tools/bootconfig: Add tracing_on support to helper scripts
Add ftrace.instance.INSTANCE.tracing_on support to ftrace2bconf.sh
and bconf2ftrace.sh.
commit 8490db06f914 ("tracing/boot: Add per-instance tracing_on
option support") added the per-instance tracing_on option,
but forgot to update the helper scripts.
IO completion can be queued to a different CPU by the block subsystem as a "call
single function/data". The CPU may run these routines from the idle task, but it
does so with interrupts disabled.
It is not a good idea to do decryption with irqs disabled even in an idle task
context, so just defer it to a tasklet (as is done with requests from hard irqs).
Nicholas Miell [Mon, 11 Jan 2021 06:09:25 +0000 (22:09 -0800)]
HID: logitech-hidpp: Add product ID for MX Ergo in Bluetooth mode
The Logitech MX Ergo trackball supports HID++ 4.5 over Bluetooth. Add its
product ID to the table so we can get battery monitoring support.
(The hid-logitech-hidpp driver already recognizes it when connected via
a Unifying Receiver.)
Qiuxu Zhuo [Thu, 14 Jan 2021 07:19:23 +0000 (15:19 +0800)]
Documentation: ACPI: EINJ: Fix error type values for PCIe errors
Fix the error type value for PCI Express uncorrectable non-fatal
error to 0x00000080 and fix the error type value for PCI Express
uncorrectable fatal error to 0x00000100.
See Advanced Configuration and Power Interface Specification,
version 6.2, table "18-409 Error Type Definition".
chen gong [Fri, 8 Jan 2021 04:46:44 +0000 (12:46 +0800)]
drm/amdgpu/gfx10: add updated GOLDEN_TSC_COUNT_UPPER/LOWER register offsets for VGH
The address of the GOLDEN_TSC_COUNT_UPPER/GOLDEN_TSC_COUNT_LOWER for
Vnagogh are different from the others.
The offset of the GOLDEN_TSC_COUNT_UPPER for Vangogh is 0x0025 by
calculation.
The offset of the GOLDEN_TSC_COUNT_LOWER for Vangogh is 0x0026 by
calculation.
Jeremy Cline [Mon, 11 Jan 2021 21:05:28 +0000 (16:05 -0500)]
drm/amdkfd: Fix out-of-bounds read in kdf_create_vcrat_image_cpu()
KASAN reported a slab-out-of-bounds read of size 1 in
kdf_create_vcrat_image_cpu().
This occurs when, for example, when on an x86_64 with a single NUMA node
because kfd_fill_iolink_info_for_cpu() is a no-op, but afterwards the
sub_type_hdr->length, which is out-of-bounds, is read and multiplied by
entries. Fortunately, entries is 0 in this case so the overall
crat_table->length is still correct.
Check if there were any entries before de-referencing sub_type_hdr which
may be pointing to out-of-bounds memory.
Rodrigo Siqueira [Mon, 11 Jan 2021 16:31:51 +0000 (11:31 -0500)]
Revert "drm/amd/display: Fixed Intermittent blue screen on OLED panel"
commit a861736dae64 ("drm/amd/display: Fixed Intermittent blue screen on OLED panel")
causes power regression for many users. It seems that this change causes
the MCLK to get forced high; this creates a regression for many users
since their devices were not able to drop to a low state after this
change. For this reason, this reverts commit a861736dae644a0d7abbca0c638ae6aad28feeb8.
Li, Roman [Wed, 30 Dec 2020 18:03:02 +0000 (18:03 +0000)]
drm/amd/display: disable dcn10 pipe split by default
[Why]
The initial purpose of dcn10 pipe split is to support some high
bandwidth mode which requires dispclk greater than max dispclk. By
initial bring up power measurement data, it showed power consumption is
less with pipe split for dcn block. This could be reason for enable pipe
split by default. By battery life measurement of some Chromebooks,
result shows battery life is longer with pipe split disabled.
[How]
Disable pipe split by default. Pipe split could be still enabled when
required dispclk is greater than max dispclk.
drm/amdgpu: fix DRM_INFO flood if display core is not supported (bug 210921)
This fix bug 210921 where DRM_INFO floods log when hitting an unsupported ASIC in
amdgpu_device_asic_has_dc_support(). This info should be only called once.
dts: phy: add GPIO number and active state used for phy reset
The GEMGXL_RST line on HiFive Unleashed is pulled low and is
using GPIO number 12. Add these reset-gpio details to dt-node
using which the linux phylib can reset the phy.
dts: phy: fix missing mdio device and probe failure of vsc8541-01 device
HiFive unleashed A00 board has VSC8541-01 ethernet phy, this device is
identified as a Revision B device as described in device identification
registers. In order to use this phy in the unmanaged mode, it requires
a specific reset sequence of logical 0-1-0-1 transition on the NRESET pin
as documented here [1].
Currently, the bootloader (fsbl or u-boot-spl) takes care of the phy reset.
If due to some reason the phy device hasn't received the reset by the prior
stages before the linux macb driver comes into the picture, the MACB mii
bus gets probed but the mdio scan fails and is not even able to read the
phy ID registers. It gives an error message:
"libphy: MACB_mii_bus: probed
mdio_bus 10090000.ethernet-ffffffff: MDIO device at address 0 is missing."
Thus adding the device OUI (Organizationally Unique Identifier) to the phy
device node helps to probe the phy device.
Andreas Schwab [Tue, 12 Jan 2021 11:55:15 +0000 (11:55 +0000)]
powerpc/vdso: Fix clock_gettime_fallback for vdso32
The second argument of __kernel_clock_gettime64 points to a struct
__kernel_timespec, with 64-bit time_t, so use the clock_gettime64
syscall in the fallback function for the 32-bit VDSO. Similarly,
clock_getres_fallback should use the clock_getres_time64 syscall,
though it isn't yet called from the 32-bit VDSO.
David Wu [Wed, 13 Jan 2021 03:41:09 +0000 (11:41 +0800)]
net: stmmac: Fixed mtu channged by cache aligned
Since the original mtu is not used when the mtu is updated,
the mtu is aligned with cache, this will get an incorrect.
For example, if you want to configure the mtu to be 1500,
but mtu 1536 is configured in fact.
Ayush Sawal [Tue, 12 Jan 2021 05:36:00 +0000 (11:06 +0530)]
cxgb4/chtls: Fix tid stuck due to wrong update of qid
TID stuck is seen when there is a race in
CPL_PASS_ACCEPT_RPL/CPL_ABORT_REQ and abort is arriving
before the accept reply, which sets the queue number.
In this case HW ends up sending CPL_ABORT_RPL_RSS to an
incorrect ingress queue.
V1->V2:
- Removed the unused variable len in chtls_set_quiesce_ctrl().
V2->V3:
- As kfree_skb() has a check for null skb, so removed this
check before calling kfree_skb() in func chtls_send_reset().
Currently, the function i40e_construct_skb_zc only frees the input xdp
buffer when the output skb is successfully built. On error, the
function i40e_clean_rx_irq_zc does not commit anything for the current
packet descriptor and simply exits the packet descriptor processing
loop, with the plan to restart the processing of this descriptor on
the next invocation. Therefore, on error the ring next-to-clean
pointer should not advance, the xdp i.e. *bi buffer should not be
freed and the current buffer info should not be invalidated by setting
*bi to NULL. Therefore, the *bi should only be set to NULL when the
function i40e_construct_skb_zc is successful, otherwise a NULL *bi
will be dereferenced when the work for the current descriptor is
eventually restarted.
Seb Laveze [Tue, 12 Jan 2021 14:01:22 +0000 (15:01 +0100)]
net: stmmac: use __napi_schedule() for PREEMPT_RT
Use of __napi_schedule_irqoff() is not safe with PREEMPT_RT in which
hard interrupts are not disabled while running the threaded interrupt.
Using __napi_schedule() works for both PREEMPT_RT and mainline Linux,
just at the cost of an additional check if interrupts are disabled for
mainline (since they are already disabled).
Similar to the fix done for enetc commit 215602a8d212 ("enetc: use
napi_schedule to be compatible with PREEMPT_RT")
If alloc_canfd_skb() returns NULL, 'cfg' is an uninitialized variable, so we
should check 'skb' rather than 'cfd' after calling alloc_canfd_skb(priv->ndev,
&cfd).
Linus Torvalds [Wed, 13 Jan 2021 19:55:14 +0000 (11:55 -0800)]
Merge tag 'sound-5.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Here are some piled fixes, hopefully the last big one for 5.11.
All changes are device-specific small fixes, and majority of commits
are for ASoC while USB-audio got a bit large changes for addressing
the regression for devices with quirks"
* tag 'sound-5.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (31 commits)
ALSA: hda/hdmi - enable runtime pm for CI AMD display audio
ALSA: firewire-tascam: Fix integer overflow in midi_port_work()
ALSA: fireface: Fix integer overflow in transmit_midi_msg()
ALSA: hda/tegra: fix tegra-hda on tegra30 soc
clk: tegra30: Add hda clock default rates to clock driver
ALSA: doc: Fix reference to mixart.rst
ALSA: usb-audio: Fix implicit feedback sync setup for Pioneer devices
ALSA: usb-audio: Annotate the endpoint index in audioformat
ALSA: usb-audio: Avoid unnecessary interface re-setup
ALSA: usb-audio: Choose audioformat of a counter-part substream
ALSA: usb-audio: Fix the missing endpoints creations for quirks
ALSA: hda/realtek: fix right sounds and mute/micmute LEDs for HP machines
ASoC: AMD Renoir - add DMI entry for Lenovo ThinkPad X395
ASoC: amd: Replacing MSI with Legacy IRQ model
ASoC: AMD Renoir - add DMI entry for Lenovo ThinkPad E14 Gen 2
ASoC: meson: axg-tdm-interface: fix loopback
ASoC: meson: axg-tdmin: fix axg skew offset
ASoC: max98373: don't access volatile registers in bias level off
ASoC: rt711: mutex between calibration and power state changes
ASoC: Intel: haswell: Add missing pm_ops
...
YANG LI [Wed, 30 Dec 2020 06:35:45 +0000 (14:35 +0800)]
cifs: style: replace one-element array with flexible-array
There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a structure.
Kernel code should always use "flexible array members"[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].
Tom Rix [Tue, 5 Jan 2021 20:21:26 +0000 (12:21 -0800)]
cifs: check pointer before freeing
clang static analysis reports this problem
dfs_cache.c:591:2: warning: Argument to kfree() is a constant address
(18446744073709551614), which is not memory allocated by malloc()
kfree(vi);
^~~~~~~~~
In dfs_cache_del_vol() the volume info pointer 'vi' being freed
is the return of a call to find_vol(). The large constant address
is find_vol() returning an error.
Add an error check to dfs_cache_del_vol() similar to the one done
in dfs_cache_update_vol().
Baptiste Lepers [Tue, 12 Jan 2021 15:59:15 +0000 (15:59 +0000)]
rxrpc: Call state should be read with READ_ONCE() under some circumstances
The call state may be changed at any time by the data-ready routine in
response to received packets, so if the call state is to be read and acted
upon several times in a function, READ_ONCE() must be used unless the call
state lock is held.
As it happens, we used READ_ONCE() to read the state a few lines above the
unmarked read in rxrpc_input_data(), so use that value rather than
re-reading it.
David Howells [Tue, 12 Jan 2021 15:23:51 +0000 (15:23 +0000)]
rxrpc: Fix handling of an unsupported token type in rxrpc_read()
Clang static analysis reports the following:
net/rxrpc/key.c:657:11: warning: Assigned value is garbage or undefined
toksize = toksizes[tok++];
^ ~~~~~~~~~~~~~~~
rxrpc_read() contains two consecutive loops. The first loop calculates the
token sizes and stores the results in toksizes[] and the second one uses
the array. When there is an error in identifying the token in the first
loop, the token is skipped, no change is made to the toksizes[] array.
When the same error happens in the second loop, the token is not skipped.
This will cause the toksizes[] array to be out of step and will overrun
past the calculated sizes.
Fix this by making both loops log a message and return an error in this
case. This should only happen if a new token type is incompletely
implemented, so it should normally be impossible to trigger this.
failed io_uring_install_fd() is a special case, we don't do
io_ring_ctx_wait_and_kill() directly but defer it to fput, though still
need to io_disable_sqo_submit() before.
note: it doesn't fix any real problem, just a warning. That's because
sqring won't be available to the userspace in this case and so SQPOLL
won't submit anything.
David Woodhouse [Wed, 6 Jan 2021 15:39:58 +0000 (15:39 +0000)]
x86/xen: Fix xen_hvm_smp_init() when vector callback not available
Only the IPI-related functions in the smp_ops should be conditional
on the vector callback being available. The rest should still happen:
• xen_hvm_smp_prepare_boot_cpu()
This function does two things, both of which should still happen if
there is no vector callback support.
The call to xen_vcpu_setup() for vCPU0 should still happen as it just
sets up the vcpu_info for CPU0. That does happen for the secondary
vCPUs too, from xen_cpu_up_prepare_hvm().
The second thing it does is call xen_init_spinlocks(), which perhaps
counter-intuitively should *also* still be happening in the case
without vector callbacks, so that it can clear its local xen_pvspin
flag and disable the virt_spin_lock_key accordingly.
Checking xen_have_vector_callback in xen_init_spinlocks() itself
would affect PV guests, so set the global nopvspin flag in
xen_hvm_smp_init() instead, when vector callbacks aren't available.
• xen_hvm_smp_prepare_cpus()
This does some IPI-related setup by calling xen_smp_intr_init() and
xen_init_lock_cpu(), which can be made conditional. And it sets the
xen_vcpu_id to XEN_VCPU_ID_INVALID for all possible CPUS, which does
need to happen.
• xen_smp_cpus_done()
This offlines any vCPUs which doesn't fit in the global shared_info
page, if separate vcpu_info placement isn't available. That part also
needs to happen regardless of vector callback support.
• xen_hvm_cpu_die()
This doesn't actually do anything other than commin_cpu_die() right
right now in the !vector_callback case; all three teardown functions
it calls should be no-ops. But to guard against future regressions
it's useful to call it anyway, and for it to explicitly check for
xen_have_vector_callback before calling those additional functions.
David Woodhouse [Wed, 6 Jan 2021 15:39:57 +0000 (15:39 +0000)]
x86/xen: Don't register Xen IPIs when they aren't going to be used
In the case where xen_have_vector_callback is false, we still register
the IPI vectors in xen_smp_intr_init() for the secondary CPUs even
though they aren't going to be used. Stop doing that.
David Woodhouse [Wed, 6 Jan 2021 15:39:56 +0000 (15:39 +0000)]
x86/xen: Add xen_no_vector_callback option to test PCI INTX delivery
It's useful to be able to test non-vector event channel delivery, to make
sure Linux will work properly on older Xen which doesn't have it.
It's also useful for those working on Xen and Xen-compatible hypervisors,
because there are guest kernels still in active use which use PCI INTX
even when vector delivery is available.
David Woodhouse [Wed, 6 Jan 2021 15:39:55 +0000 (15:39 +0000)]
xen: Set platform PCI device INTX affinity to CPU0
With INTX or GSI delivery, Xen uses the event channel structures of CPU0.
If the interrupt gets handled by Linux on a different CPU, then no events
are seen as pending. Rather than introducing locking to allow other CPUs
to process CPU0's events, just ensure that the PCI interrupts happens
only on CPU0.
David Woodhouse [Wed, 13 Jan 2021 13:26:02 +0000 (13:26 +0000)]
xen: Fix event channel callback via INTX/GSI
For a while, event channel notification via the PCI platform device
has been broken, because we attempt to communicate with xenstore before
we even have notifications working, with the xs_reset_watches() call
in xs_init().
We tend to get away with this on Xen versions below 4.0 because we avoid
calling xs_reset_watches() anyway, because xenstore might not cope with
reading a non-existent key. And newer Xen *does* have the vector
callback support, so we rarely fall back to INTX/GSI delivery.
To fix it, clean up a bit of the mess of xs_init() and xenbus_probe()
startup. Call xs_init() directly from xenbus_init() only in the !XS_HVM
case, deferring it to be called from xenbus_probe() in the XS_HVM case
instead.
Then fix up the invocation of xenbus_probe() to happen either from its
device_initcall if the callback is available early enough, or when the
callback is finally set up. This means that the hack of calling
xenbus_probe() from a workqueue after the first interrupt, or directly
from the PCI platform device setup, is no longer needed.
Arnd Bergmann [Fri, 8 Jan 2021 09:19:56 +0000 (10:19 +0100)]
arm64: make atomic helpers __always_inline
With UBSAN enabled and building with clang, there are occasionally
warnings like
WARNING: modpost: vmlinux.o(.text+0xc533ec): Section mismatch in reference from the function arch_atomic64_or() to the variable .init.data:numa_nodes_parsed
The function arch_atomic64_or() references
the variable __initdata numa_nodes_parsed.
This is often because arch_atomic64_or lacks a __initdata
annotation or the annotation of numa_nodes_parsed is wrong.
for functions that end up not being inlined as intended but operating
on __initdata variables. Mark these as __always_inline, along with
the corresponding asm-generic wrappers.
Jianlin Lv [Tue, 12 Jan 2021 01:58:13 +0000 (09:58 +0800)]
arm64: rename S_FRAME_SIZE to PT_REGS_SIZE
S_FRAME_SIZE is the size of the pt_regs structure, no longer the size of
the kernel stack frame, the name is misleading. In keeping with arm32,
rename S_FRAME_SIZE to PT_REGS_SIZE.
lockup_detector_init() makes heavy use of per-cpu variables and must be
called with preemption disabled. Usually, it's handled early during boot
in kernel_init_freeable(), before SMP has been initialised.
Since we do not know whether or not our PMU interrupt can be signalled
as an NMI until considerably later in the boot process, the Arm PMU
driver attempts to re-initialise the lockup detector off the back of a
device_initcall(). Unfortunately, this is called from preemptible
context and results in the following splat:
Rather than bodge this with raw_smp_processor_id() or randomly disabling
preemption, simply revert the culprit for now until we figure out how to
do this properly.
Mark Rutland [Thu, 7 Jan 2021 14:53:10 +0000 (14:53 +0000)]
arm64: entry: remove redundant IRQ flag tracing
All EL0 returns go via ret_to_user(), which masks IRQs and notifies
lockdep and tracing before calling into do_notify_resume(). Therefore,
there's no need for do_notify_resume() to call trace_hardirqs_off(), and
the comment is stale. The call is simply redundant.
In ret_to_user() we call exit_to_user_mode(), which notifies lockdep and
tracing the IRQs will be enabled in userspace, so there's no need for
el0_svc_common() to call trace_hardirqs_on() before returning. Further,
at the start of ret_to_user() we call trace_hardirqs_off(), so not only
is this redundant, but it is immediately undone.
In addition to being redundant, the trace_hardirqs_on() in
el0_svc_common() leaves lockdep inconsistent with the hardware state,
and is liable to cause issues for any C code or instrumentation
between this and the call to trace_hardirqs_off() which undoes it in
ret_to_user().
This patch removes the redundant tracing calls and associated stale
comments.
MIPS: relocatable: fix possible boot hangup with KASLR enabled
LLVM-built Linux triggered a boot hangup with KASLR enabled.
arch/mips/kernel/relocate.c:get_random_boot() uses linux_banner,
which is a string constant, as a random seed, but accesses it
as an array of unsigned long (in rotate_xor()).
When the address of linux_banner is not aligned to sizeof(long),
such access emits unaligned access exception and hangs the kernel.
Use PTR_ALIGN() to align input address to sizeof(long) and also
align down the input length to prevent possible access-beyond-end.
====================
net/smc: fix out of bound access in netlink interface
Both patches fix possible out-of-bounds reads. The original code expected
that snprintf() reads len-1 bytes from source and appends the terminating
null, but actually snprintf() first copies len bytes and finally overwrites
the last byte with a null.
Fix this by using memcpy() and terminating the string afterwards.
====================
Guvenc Gulce [Tue, 12 Jan 2021 16:21:22 +0000 (17:21 +0100)]
net/smc: use memcpy instead of snprintf to avoid out of bounds read
Using snprintf() to convert not null-terminated strings to null
terminated strings may cause out of bounds read in the source string.
Therefore use memcpy() and terminate the target string with a null
afterwards.
Fixes: a3db10efcc4c ("net/smc: Add support for obtaining SMCR device list") Signed-off-by: Guvenc Gulce <[email protected]> Signed-off-by: Karsten Graul <[email protected]> Signed-off-by: Jakub Kicinski <[email protected]>
Atish Patra [Sat, 19 Dec 2020 00:20:51 +0000 (16:20 -0800)]
riscv: Trace irq on only interrupt is enabled
We should call irq trace only if interrupt is going to be enabled during
excecption handling. Otherwise, it results in following warning during
boot with lock debugging enabled.
Paolo Abeni [Tue, 12 Jan 2021 17:25:24 +0000 (18:25 +0100)]
mptcp: better msk-level shutdown.
Instead of re-implementing most of inet_shutdown, re-use
such helper, and implement the MPTCP-specific bits at the
'proto' level.
The msk-level disconnect() can now be invoked, lets provide a
suitable implementation.
As a side effect, this fixes bad state management for listener
sockets. The latter could lead to division by 0 oops since
commit ea4ca586b16f ("mptcp: refine MPTCP-level ack scheduling").
Fixes: 43b54c6ee382 ("mptcp: Use full MPTCP-level disconnect state machine") Fixes: ea4ca586b16f ("mptcp: refine MPTCP-level ack scheduling") Signed-off-by: Paolo Abeni <[email protected]> Reviewed-by: Mat Martineau <[email protected]> Signed-off-by: Jakub Kicinski <[email protected]>
Jakub Kicinski [Wed, 13 Jan 2021 04:05:37 +0000 (20:05 -0800)]
Merge branch 'bnxt_en-bug-fixes'
Michael Chan says:
====================
bnxt_en: Bug fixes.
This series has 2 fixes. The first one fixes a resource accounting error
with the RDMA driver loaded and the second one fixes the firmware
flashing sequence after defragmentation.
====================
Pavan Chebbi [Mon, 11 Jan 2021 09:26:40 +0000 (04:26 -0500)]
bnxt_en: Clear DEFRAG flag in firmware message when retry flashing.
When the FW tells the driver to retry the INSTALL_UPDATE command after
it has cleared the NVM area, the driver is not clearing the previously
used ALLOWED_TO_DEFRAG flag. As a result the FW tries to defrag the NVM
area a second time in a loop and can fail the request.
Fixes: 1432c3f6a6ca ("bnxt_en: Retry installing FW package under NO_SPACE error condition.") Signed-off-by: Pavan Chebbi <[email protected]> Signed-off-by: Michael Chan <[email protected]> Signed-off-by: Jakub Kicinski <[email protected]>
Michael Chan [Mon, 11 Jan 2021 09:26:39 +0000 (04:26 -0500)]
bnxt_en: Improve stats context resource accounting with RDMA driver loaded.
The function bnxt_get_ulp_stat_ctxs() does not count the stats contexts
used by the RDMA driver correctly when the RDMA driver is freeing the
MSIX vectors. It assumes that if the RDMA driver is registered, the
additional stats contexts will be needed. This is not true when the
RDMA driver is about to unregister and frees the MSIX vectors.
This slight error leads to over accouting of the stats contexts needed
after the RDMA driver has unloaded. This will cause some firmware
warning and error messages in dmesg during subsequent config. changes
or ifdown/ifup.
Fix it by properly accouting for extra stats contexts only if the
RDMA driver is registered and MSIX vectors have been successfully
requested.
Leon Schuermann [Mon, 11 Jan 2021 19:03:15 +0000 (20:03 +0100)]
r8153_ecm: Add Lenovo Powered USB-C Hub as a fallback of r8152
This commit enables the use of the r8153_ecm driver, introduced with
commit c1aedf015ebdd0 ("net/usb/r8153_ecm: support ECM mode for
RTL8153") for the Lenovo Powered USB-C Hub (17ef:721e) based on the
Realtek RTL8153B chip.
This results in the following driver preference:
- if r8152 is available, use the r8152 driver
- if r8152 is not available, use the r8153_ecm driver
This is done to prevent the NIC from constantly sending pause frames
when the host system enters standby (fixed by using the r8152 driver
in "r8152: Add Lenovo Powered USB-C Travel Hub"), while still allowing
the device to work with the r8153_ecm driver as a fallback.
Leon Schuermann [Mon, 11 Jan 2021 19:03:13 +0000 (20:03 +0100)]
r8152: Add Lenovo Powered USB-C Travel Hub
This USB-C Hub (17ef:721e) based on the Realtek RTL8153B chip used to
use the cdc_ether driver. However, using this driver, with the system
suspended the device constantly sends pause-frames as soon as the
receive buffer fills up. This causes issues with other devices, where
some Ethernet switches stop forwarding packets altogether.
Using the Realtek driver (r8152) fixes this issue. Pause frames are no
longer sent while the host system is suspended.
What happens is that devlink_port_unregister emits a netlink
DEVLINK_CMD_PORT_DEL message which associates the devlink port that is
getting unregistered with the ifindex of its corresponding net_device.
Only trouble is, the net_device has already been unregistered.
It looks like we can stub out the search for a corresponding net_device
if we clear the devlink_port's type. This looks like a bit of a hack,
but also seems to be the reason why the devlink_port_type_clear function
exists in the first place.
/* Notifier chain MUST detach us all upper devices. */
WARN_ON(netdev_has_any_upper_dev(dev));
Other stacked interfaces, like VLAN, do indeed listen for
NETDEV_UNREGISTER on the real_dev and also unregister themselves at that
time, which is clearly the behavior that rollback_registered_many
expects. But DSA interfaces are not VLAN. They have backing hardware
(platform devices, PCI devices, MDIO, SPI etc) which have a life cycle
of their own and we can't just trigger an unregister from the DSA
framework when we receive a netdev notifier that the master unregisters.
Luckily, there is something we can do, and that is to inform the driver
core that we have a runtime dependency to the DSA master interface's
device, and create a device link where that is the supplier and we are
the consumer. Having this device link will make the DSA switch unbind
before the DSA master unbinds, which is enough to avoid the WARN_ON from
rollback_registered_many.
Note that even before the blamed commit, DSA did nothing intelligent
when the master interface got unregistered either. See the discussion
here:
https://lore.kernel.org/netdev/20200505210253[email protected]/
But this time, at least the WARN_ON is loud enough that the
upper_dev_link commit can be blamed.
The advantage with this approach vs dev_hold(master) in the attached
link is that the latter is not meant for long term reference counting.
With dev_hold, the only thing that will happen is that when the user
attempts an unbind of the DSA master, netdev_wait_allrefs will keep
waiting and waiting, due to DSA keeping the refcount forever. DSA would
not access freed memory corresponding to the master interface, but the
unbind would still result in a freeze. Whereas with device links,
graceful teardown is ensured. It even works with cascaded DSA trees.
$ echo 0000:00:00.2 > /sys/bus/pci/drivers/fsl_enetc/unbind
[ 1818.797546] device swp0 left promiscuous mode
[ 1819.301112] sja1105 spi2.0: Link is Down
[ 1819.307981] DSA: tree 1 torn down
[ 1819.312408] device eno2 left promiscuous mode
[ 1819.656803] mscc_felix 0000:00:00.5: Link is Down
[ 1819.667194] DSA: tree 0 torn down
[ 1819.711557] fsl_enetc 0000:00:00.2 eno2: Link is Down
This approach allows us to keep the DSA framework absolutely unchanged,
and the driver core will just know to unbind us first when the master
goes away - as opposed to the large (and probably impossible) rework
required if attempting to listen for NETDEV_UNREGISTER.
As per the documentation at Documentation/driver-api/device_link.rst,
specifying the DL_FLAG_AUTOREMOVE_CONSUMER flag causes the device link
to be automatically purged when the consumer fails to probe or later
unbinds. So we don't need to keep the consumer_link variable in struct
dsa_switch.
Marco Felsch [Mon, 11 Jan 2021 08:59:32 +0000 (09:59 +0100)]
net: phy: smsc: fix clk error handling
Commit bedd8d78aba3 ("net: phy: smsc: LAN8710/20: add phy refclk in
support") added the phy clk support. The commit already checks if
clk_get_optional() throw an error but instead of returning the error it
ignores it.
Andrew Morton [Tue, 12 Jan 2021 23:49:33 +0000 (15:49 -0800)]
mm/process_vm_access.c: include compat.h
Fix the build error:
mm/process_vm_access.c:277:5: error: implicit declaration of function 'in_compat_syscall'; did you mean 'in_ia32_syscall'? [-Werror=implicit-function-declaration]
Vlastimil Babka [Tue, 12 Jan 2021 23:49:27 +0000 (15:49 -0800)]
MAINTAINERS: add Vlastimil as slab allocators maintainer
I would like to help with slab allocators maintenance, from the
perspective of being responsible for SLAB and more recently also SLUB in
an enterprise distro kernel and supporting its users. Recently I've
been focusing on improving SLUB's debugging features, and patch review
in the area, including the kmemcg accounting rewrite last year.
Jan Stancek [Tue, 12 Jan 2021 23:49:21 +0000 (15:49 -0800)]
mm: migrate: initialize err in do_migrate_pages
After commit 236c32eb1096 ("mm: migrate: clean up migrate_prep{_local}")',
do_migrate_pages can return uninitialized variable 'err' (which is
propagated to user-space as error) when 'from' and 'to' nodesets are
identical. This can be reproduced with LTP migrate_pages01, which calls
migrate_pages() with same set for both old/new_nodes.
Miaohe Lin [Tue, 12 Jan 2021 23:49:18 +0000 (15:49 -0800)]
mm/vmalloc.c: fix potential memory leak
In VM_MAP_PUT_PAGES case, we should put pages and free array in vfree.
But we missed to set area->nr_pages in vmap(). So we would fail to put
pages in __vunmap() because area->nr_pages = 0.
Hailong Liu [Tue, 12 Jan 2021 23:49:14 +0000 (15:49 -0800)]
arm/kasan: fix the array size of kasan_early_shadow_pte[]
The size of kasan_early_shadow_pte[] now is PTRS_PER_PTE which defined
to 512 for arm. This means that it only covers the prev Linux pte
entries, but not the HWTABLE pte entries for arm.
The reason it currently works is that the symbol kasan_early_shadow_page
immediately following kasan_early_shadow_pte in memory is page aligned,
which makes kasan_early_shadow_pte look like a 4KB size array. But we
can't ensure the order is always right with different compiler/linker,
or if more bss symbols are introduced.
We had a test with QEMU + vexpress：put a 512KB-size symbol with
attribute __section(".bss..page_aligned") after kasan_early_shadow_pte,
and poisoned it after kasan_early_init(). Then enabled CONFIG_KASAN, it
failed to boot up.
Hugh Dickins [Tue, 12 Jan 2021 23:49:11 +0000 (15:49 -0800)]
mm/memcontrol: fix warning in mem_cgroup_page_lruvec()
Boot a CONFIG_MEMCG=y kernel with "cgroup_disabled=memory" and you are
met by a series of warnings from the VM_WARN_ON_ONCE_PAGE(!memcg, page)
recently added to the inline mem_cgroup_page_lruvec().
An earlier attempt to place that warning, in mem_cgroup_lruvec(), had
been careful to do so after weeding out the mem_cgroup_disabled() case;
but was itself invalid because of the mem_cgroup_lruvec(NULL, pgdat) in
clear_pgdat_congested() and age_active_anon().
Warning in mem_cgroup_page_lruvec() was once useful in detecting a KSM
charge bug, so may be worth keeping: but skip if mem_cgroup_disabled().
Hailong liu [Tue, 12 Jan 2021 23:49:08 +0000 (15:49 -0800)]
mm/page_alloc: add a missing mm_page_alloc_zone_locked() tracepoint
The trace point *trace_mm_page_alloc_zone_locked()* in __rmqueue() does
not currently cover all branches. Add the missing tracepoint and check
the page before do that.
Jann Horn [Tue, 12 Jan 2021 23:49:04 +0000 (15:49 -0800)]
mm, slub: consider rest of partial list if acquire_slab() fails
acquire_slab() fails if there is contention on the freelist of the page
(probably because some other CPU is concurrently freeing an object from
the page). In that case, it might make sense to look for a different page
(since there might be more remote frees to the page from other CPUs, and
we don't want contention on struct page).
However, the current code accidentally stops looking at the partial list
completely in that case. Especially on kernels without CONFIG_NUMA set,
this means that get_partial() fails and new_slab_objects() falls back to
new_slab(), allocating new pages. This could lead to an unnecessary
increase in memory fragmentation.
In commit 826f328e2b7e ("net: dcb: Validate netlink message in DCB
handler"), Linux started rejecting RTM_GETDCB netlink messages if they
contained a set-like DCB_CMD_ command.
The reason was that privileges were only verified for RTM_SETDCB messages,
but the value that determined the action to be taken is the command, not
the message type. And validation of message type against the DCB command
was the obvious missing piece.
Unfortunately it turns out that mlnx_qos, a somewhat widely deployed tool
for configuration of DCB, accesses the DCB set-like APIs through
RTM_GETDCB.
Therefore do not bounce the discrepancy between message type and command.
Instead, in addition to validating privileges based on the actual message
type, validate them also based on the expected message type. This closes
the loophole of allowing DCB configuration on non-admin accounts, while
maintaining backward compatibility.
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