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authorPeter Oberparleiter <peter.oberparleiter@de.ibm.com>2005-09-16 19:27:42 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-17 11:49:59 -0700
commit6add9f7f529b124938d14ae9db5a952d1272075a (patch)
tree512f82531228094f6c8696296f36304a4a4e7049 /arch/s390/kernel/entry.S
parent26ff6ad9786abf6f40a6d3cbb89753b4fa50cb00 (diff)
[PATCH] s390: kernel stack corruption
When an asynchronous interruption occurs during the execution of the 'critical section' within the generic interruption handling code (entry.S), a faulty check for a userspace PSW may result in a corrupted kernel stack pointer which subsequently triggers a stack overflow check. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/s390/kernel/entry.S')
-rw-r--r--arch/s390/kernel/entry.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 58fc7fbcb40e..9b30f4cf32c4 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -108,7 +108,7 @@ STACK_SIZE = 1 << STACK_SHIFT
bl BASED(0f)
l %r14,BASED(.Lcleanup_critical)
basr %r14,%r14
- tm 0(%r12),0x01 # retest problem state after cleanup
+ tm 1(%r12),0x01 # retest problem state after cleanup
bnz BASED(1f)
0: l %r14,__LC_ASYNC_STACK # are we already on the async stack ?
slr %r14,%r15