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Message-Id: <20240620162316.3674955-4-arnd@kernel.org>
Date: Thu, 20 Jun 2024 18:23:04 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: linux-arch@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Arnd Bergmann <arnd@...db.de>,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
linux-mips@...r.kernel.org,
Helge Deller <deller@....de>,
linux-parisc@...r.kernel.org,
"David S. Miller" <davem@...emloft.net>,
Andreas Larsson <andreas@...sler.com>,
sparclinux@...r.kernel.org,
Michael Ellerman <mpe@...erman.id.au>,
Nicholas Piggin <npiggin@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
"Naveen N . Rao" <naveen.n.rao@...ux.ibm.com>,
linuxppc-dev@...ts.ozlabs.org,
Brian Cain <bcain@...cinc.com>,
linux-hexagon@...r.kernel.org,
Guo Ren <guoren@...nel.org>,
linux-csky@...r.kernel.org,
Heiko Carstens <hca@...ux.ibm.com>,
linux-s390@...r.kernel.org,
Rich Felker <dalias@...c.org>,
John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
linux-sh@...r.kernel.org,
"H. Peter Anvin" <hpa@...or.com>,
Alexander Viro <viro@...iv.linux.org.uk>,
Christian Brauner <brauner@...nel.org>,
linux-fsdevel@...r.kernel.org,
libc-alpha@...rceware.org,
musl@...ts.openwall.com,
ltp@...ts.linux.it
Subject: [PATCH 03/15] mips: fix compat_sys_lseek syscall
From: Arnd Bergmann <arnd@...db.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@...db.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
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