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mips: fix compat_sys_lseek syscall

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[ Upstream commit 0d5679a0aa ]

This is almost compatible, but passing a negative offset should result
in a EINVAL error, but on mips o32 compat mode would seek to a large
32-bit byte offset.

Use compat_sys_lseek() to correctly sign-extend the argument.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Arnd Bergmann 2024-06-20 18:23:04 +02:00 committed by Greg Kroah-Hartman
parent 94288fc3a1
commit be7b66d360
1 changed files with 1 additions and 1 deletions
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2
arch/mips/kernel/syscalls/syscall_o32.tbl
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@ -27,7 +27,7 @@
17 o32 break sys_ni_syscall 17 o32 break sys_ni_syscall
# 18 was sys_stat # 18 was sys_stat
18 o32 unused18 sys_ni_syscall 18 o32 unused18 sys_ni_syscall
19 o32 lseek sys_lseek 19 o32 lseek sys_lseek compat_sys_lseek
20 o32 getpid sys_getpid 20 o32 getpid sys_getpid
21 o32 mount sys_mount 21 o32 mount sys_mount
22 o32 umount sys_oldumount 22 o32 umount sys_oldumount