diff options
| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2019-10-02 12:56:27 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2019-10-31 17:20:53 +0100 |
| commit | ea3f6dcfa71afb51753ad3729c29570f90d6abbc (patch) | |
| tree | 15d50b5925deaab9ec52f5605cf4891cfeb9f296 | |
| parent | d3baaeb5ae0870973bfe0f6aaed887b894d5e560 (diff) | |
s390/unwind: fix get_stack_pointer(NULL, NULL)
unwind_for_each_frame(NULL, NULL, 0) does not return any valid frames.
The reason is that get_stack_pointer, unlike get_stack_info and
show_stack, does not handle NULL argument.
Fix by making get_stack_pointer treat NULL as current, like
get_stack_info and show_stack do.
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Tested-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
| -rw-r--r-- | arch/s390/include/asm/stacktrace.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/include/asm/stacktrace.h b/arch/s390/include/asm/stacktrace.h index 0ae4bbf7779c..fee40212af11 100644 --- a/arch/s390/include/asm/stacktrace.h +++ b/arch/s390/include/asm/stacktrace.h @@ -38,7 +38,7 @@ static inline unsigned long get_stack_pointer(struct task_struct *task, { if (regs) return (unsigned long) kernel_stack_pointer(regs); - if (task == current) + if (!task || task == current) return current_stack_pointer(); return (unsigned long) task->thread.ksp; } |