]> Git Repo - linux.git/commit
parisc: io_pgetevents_time64() needs compat syscall in 32-bit compat mode
authorHelge Deller <[email protected]>
Mon, 1 Aug 2022 15:36:15 +0000 (17:36 +0200)
committerHelge Deller <[email protected]>
Mon, 1 Aug 2022 16:43:24 +0000 (18:43 +0200)
commit6431e92fc827bdd2d28f79150d90415ba9ce0d21
tree63e01900815184251b074af9884ef8fa384336f8
parentcbe263b6b0eb1309adf6c7e5dbd53e2dbd81736b
parisc: io_pgetevents_time64() needs compat syscall in 32-bit compat mode

For all syscalls in 32-bit compat mode on 64-bit kernels the upper
32-bits of the 64-bit registers are zeroed out, so a negative 32-bit
signed value will show up as positive 64-bit signed value.

This behaviour breaks the io_pgetevents_time64() syscall which expects
signed 64-bit values for the "min_nr" and "nr" parameters.
Fix this by switching to the compat_sys_io_pgetevents_time64() syscall,
which uses "compat_long_t" types for those parameters.

Cc: <[email protected]> # v5.1+
Signed-off-by: Helge Deller <[email protected]>
arch/parisc/kernel/syscalls/syscall.tbl
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