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authorDavid Daney <ddaney@caviumnetworks.com>2010-11-02 01:43:08 +0100
committerRalf Baechle <ralf@linux-mips.org>2010-12-16 19:10:54 +0100
commitd62c9ced7ca783e64ff4d9d3d1340cfe2284d47b (patch)
tree6485cecd4bcf8a010cb04198dc2b9bd1d3c8d2fc /arch/mips
parentMIPS: Don't clobber personality high bits. (diff)
downloadlinux-d62c9ced7ca783e64ff4d9d3d1340cfe2284d47b.tar.xz
linux-d62c9ced7ca783e64ff4d9d3d1340cfe2284d47b.zip
MIPS: compat: Don't clobber personality bits in 32-bit sys_personality().
If PER_LINUX32 has been set on a 32-bit kernel, only twiddle with the low-order personality bits, let the upper bits pass through. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Cc: Camm Maguire <camm@maguirefamily.org> Patchwork: https://patchwork.linux-mips.org/patch/1751/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/kernel/linux32.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 6343b4a5b835..876a75cc376f 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -251,14 +251,15 @@ SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz,
SYSCALL_DEFINE1(32_personality, unsigned long, personality)
{
+ unsigned int p = personality & 0xffffffff;
int ret;
- personality &= 0xffffffff;
+
if (personality(current->personality) == PER_LINUX32 &&
- personality == PER_LINUX)
- personality = PER_LINUX32;
- ret = sys_personality(personality);
- if (ret == PER_LINUX32)
- ret = PER_LINUX;
+ personality(p) == PER_LINUX)
+ p = (p & ~PER_MASK) | PER_LINUX32;
+ ret = sys_personality(p);
+ if (ret != -1 && personality(ret) == PER_LINUX32)
+ ret = (ret & ~PER_MASK) | PER_LINUX;
return ret;
}