Thread (39 messages) 39 messages, 12 authors, 2024-06-24

Re: [PATCH 03/15] mips: fix compat_sys_lseek syscall

From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: 2024-06-21 08:28:24
Also in: linux-arch, linux-fsdevel, linux-mips, linux-s390, linux-sh, lkml, ltp, sparclinux

On Thu, Jun 20, 2024 at 06:23:04PM +0200, Arnd Bergmann wrote:
quoted hunk ↗ jump to hunk
From: Arnd Bergmann <arnd@arndb.de>

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>
---
 arch/mips/kernel/syscalls/syscall_o32.tbl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl
index 85751c9b9cdb..2439a2491cff 100644
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -27,7 +27,7 @@
 17	o32	break				sys_ni_syscall
 # 18 was sys_stat
 18	o32	unused18			sys_ni_syscall
-19	o32	lseek				sys_lseek
+19	o32	lseek				sys_lseek			compat_sys_lseek
 20	o32	getpid				sys_getpid
 21	o32	mount				sys_mount
 22	o32	umount				sys_oldumount
-- 
2.39.2
applied to mips-fixes.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]
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