From 9900c48c46d8bcf497972024c5fe366e6d9771f3 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Mon, 1 Feb 2016 10:13:05 +0100 Subject: [PATCH] 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 Tested-by: Peter Oberparleiter Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/stacktrace.c | 11 ++++++----- 1 file 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,