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authorJiri Kosina <jkosina@suse.cz>2012-08-01 21:10:51 +0200
committerDavid S. Miller <davem@davemloft.net>2012-08-02 00:26:50 -0700
commita27032eee8cb6e16516f13c8a9752e9d5d4cc430 (patch)
treec8db15dbfa5e724fb70fb4d812288281597bcaf3
parent1a9b4993b70fb1884716902774dc9025b457760d (diff)
downloadlinux-linaro-stable-a27032eee8cb6e16516f13c8a9752e9d5d4cc430.tar.gz
sparc64: do not clobber personality flags in sys_sparc64_personality()
There are multiple errors in how sys_sparc64_personality() handles personality flags stored in top three bytes. - directly comparing current->personality against PER_LINUX32 doesn't work in cases when any of the personality flags stored in the top three bytes are used. - directly forcefully setting personality to PER_LINUX32 or PER_LINUX discards any flags stored in the top three bytes Fix the first one by properly using personality() macro to compare only PER_MASK bytes. Fix the second one by setting only the bits that should be set, instead of overwriting the whole value. Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--arch/sparc/kernel/sys_sparc_64.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c
index 0dc1f5786081..11c6c9603e71 100644
--- a/arch/sparc/kernel/sys_sparc_64.c
+++ b/arch/sparc/kernel/sys_sparc_64.c
@@ -502,12 +502,12 @@ SYSCALL_DEFINE1(sparc64_personality, unsigned long, personality)
{
int ret;
- if (current->personality == PER_LINUX32 &&
- personality == PER_LINUX)
- personality = PER_LINUX32;
+ if (personality(current->personality) == PER_LINUX32 &&
+ personality(personality) == PER_LINUX)
+ personality |= PER_LINUX32;
ret = sys_personality(personality);
- if (ret == PER_LINUX32)
- ret = PER_LINUX;
+ if (personality(ret) == PER_LINUX32)
+ ret &= ~PER_LINUX32;
return ret;
}