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authorHeiko Carstens <heiko.carstens@de.ibm.com>2016-02-01 12:13:05 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-02-10 11:25:20 +0300
commit9900c48c46d8bcf497972024c5fe366e6d9771f3 (patch)
treef4e70da439a307524df54841414af77fbd70b36f /arch/s390
parent665ca9187c4087736fa57b0e00bcf33ea601fb6f (diff)
downloadlinux-9900c48c46d8bcf497972024c5fe366e6d9771f3.tar.xz
s390/stacktrace: fix address ranges for asynchronous and panic stack
git commit dc7ee00d4771 ("s390: lowcore stack pointer offsets") introduced a regression in regard to save_stack_trace(). The stack pointer for the asynchronous and the panic stack in the lowcore now have an additional offset applied to them. This offset needs to be taken into account in the calculation for the low and high address for the stacks. This bug was already partially fixed with 9cc5c206d9b4 ("s390/dumpstack: fix address ranges for asynchronous and panic stack"). This patch fixes it also for the stacktrace code. Fixes: dc7ee00d4771 ("s390: lowcore stack pointer offsets") Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Tested-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kernel/stacktrace.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/s390/kernel/stacktrace.c b/arch/s390/kernel/stacktrace.c
index dd484c75be56..225bed00aa92 100644
--- a/arch/s390/kernel/stacktrace.c
+++ b/arch/s390/kernel/stacktrace.c
@@ -62,17 +62,18 @@ static unsigned long save_context_stack(struct stack_trace *trace,
void save_stack_trace(struct stack_trace *trace)
{
register unsigned long sp asm ("15");
- unsigned long orig_sp, new_sp;
+ unsigned long orig_sp, new_sp, frame_size;
+ frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
orig_sp = sp;
new_sp = save_context_stack(trace, orig_sp,
- S390_lowcore.panic_stack - PAGE_SIZE,
- S390_lowcore.panic_stack, 1);
+ S390_lowcore.panic_stack + frame_size - PAGE_SIZE,
+ S390_lowcore.panic_stack + frame_size, 1);
if (new_sp != orig_sp)
return;
new_sp = save_context_stack(trace, new_sp,
- S390_lowcore.async_stack - ASYNC_SIZE,
- S390_lowcore.async_stack, 1);
+ S390_lowcore.async_stack + frame_size - ASYNC_SIZE,
+ S390_lowcore.async_stack + frame_size, 1);
if (new_sp != orig_sp)
return;
save_context_stack(trace, new_sp,