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authorRalf Baechle <ralf@linux-mips.org>2014-11-04 13:54:29 +0300
committerRalf Baechle <ralf@linux-mips.org>2014-11-04 14:46:33 +0300
commit0097761013253930341e23723d64e0845c3f9edd (patch)
treeb0a8e44f720c2966e5c545f0cff5a638593cfb95 /arch/mips/lib
parent30fa0530ff87f6379e046629adfa3f4872a2d353 (diff)
downloadlinux-0097761013253930341e23723d64e0845c3f9edd.tar.xz
MIPS: Fix strnlen_user() return value in case of overlong strings.
We were returning maxlen like the userland strnlen if no '\0' character was encountered while the kernel version is expected to return a value larger than maxlen. Fixed to return maxlen + 1. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/lib')
-rw-r--r--arch/mips/lib/strnlen_user.S6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/mips/lib/strnlen_user.S b/arch/mips/lib/strnlen_user.S
index f3af6995e2a6..7d12c0dded3d 100644
--- a/arch/mips/lib/strnlen_user.S
+++ b/arch/mips/lib/strnlen_user.S
@@ -40,9 +40,11 @@ FEXPORT(__strnlen_\func\()_nocheck_asm)
.else
EX(lbe, t0, (v0), .Lfault\@)
.endif
- PTR_ADDIU v0, 1
+ .set noreorder
bnez t0, 1b
-1: PTR_SUBU v0, a0
+1: PTR_ADDIU v0, 1
+ .set reorder
+ PTR_SUBU v0, a0
jr ra
END(__strnlen_\func\()_asm)