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| author |   Jiri Kosina <jkosina@suse.cz> | 2012-08-01 21:10:51 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2012-08-02 00:26:50 -0700 |
| commit | a27032eee8cb6e16516f13c8a9752e9d5d4cc430 (patch) | |
| tree | c8db15dbfa5e724fb70fb4d812288281597bcaf3 /arch/sparc/kernel | |
| parent | Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus (diff) | |
| download | linux-dev-a27032eee8cb6e16516f13c8a9752e9d5d4cc430.tar.xz linux-dev-a27032eee8cb6e16516f13c8a9752e9d5d4cc430.zip | |
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>
Diffstat (limited to 'arch/sparc/kernel')
| -rw-r--r-- | arch/sparc/kernel/sys_sparc_64.c | 10 |
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; } |