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| author | Helge Deller <deller@gmx.de> | 2022-08-01 17:36:15 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2022-08-01 18:43:24 +0200 |
| commit | 6431e92fc827bdd2d28f79150d90415ba9ce0d21 (patch) | |
| tree | 63e01900815184251b074af9884ef8fa384336f8 /arch/parisc | |
| parent | parisc: Drop zero variable initialisations in mm/init.c (diff) | |
| download | linux-6431e92fc827bdd2d28f79150d90415ba9ce0d21.tar.xz linux-6431e92fc827bdd2d28f79150d90415ba9ce0d21.zip | |
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: <stable@vger.kernel.org> # v5.1+
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/kernel/syscalls/syscall.tbl | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl index 68b46fe2f17c..8a99c998da9b 100644 --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -413,7 +413,7 @@ 412 32 utimensat_time64 sys_utimensat sys_utimensat 413 32 pselect6_time64 sys_pselect6 compat_sys_pselect6_time64 414 32 ppoll_time64 sys_ppoll compat_sys_ppoll_time64 -416 32 io_pgetevents_time64 sys_io_pgetevents sys_io_pgetevents +416 32 io_pgetevents_time64 sys_io_pgetevents compat_sys_io_pgetevents_time64 417 32 recvmmsg_time64 sys_recvmmsg compat_sys_recvmmsg_time64 418 32 mq_timedsend_time64 sys_mq_timedsend sys_mq_timedsend 419 32 mq_timedreceive_time64 sys_mq_timedreceive sys_mq_timedreceive |