This is a note to let you know that I've just added the patch titled
sparc64: do not clobber personality flags in sys_sparc64_personality()
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sparc64-do-not-clobber-personality-flags-in-sys_sparc64_personality.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 5b5ad809cd2d593cc34260a5ff064ff7e3a525c1 Mon Sep 17 00:00:00 2001
From: Jiri Kosina <[email protected]>
Date: Wed, 1 Aug 2012 21:10:51 +0200
Subject: sparc64: do not clobber personality flags in sys_sparc64_personality()
From: Jiri Kosina <[email protected]>
[ Upstream commit a27032eee8cb6e16516f13c8a9752e9d5d4cc430 ]
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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/sparc/kernel/sys_sparc_64.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
--- a/arch/sparc/kernel/sys_sparc_64.c
+++ b/arch/sparc/kernel/sys_sparc_64.c
@@ -519,12 +519,12 @@ SYSCALL_DEFINE1(sparc64_personality, uns
{
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;
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/sparc64-do-not-clobber-personality-flags-in-sys_sparc64_personality.patch
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