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Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull stacktrace fix from Thomas Gleixner:
 "A small fix for a stacktrace regression.

  Saving a stacktrace for a foreign task skipped an extra entry which
  makes e.g. the output of /proc/$PID/stack incomplete"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  stacktrace: Don't skip first entry on noncurrent tasks
alistair/sunxi64-5.4-dsi
Linus Torvalds 2019-11-10 11:47:39 -08:00
parent 79a64063a8 b0c51f1584
commit 20c7e29684
1 changed files with 4 additions and 2 deletions
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6
kernel/stacktrace.c
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@ -141,7 +141,8 @@ unsigned int stack_trace_save_tsk(struct task_struct *tsk, unsigned long *store,
struct stacktrace_cookie c = {
.store = store,
.size = size,
.skip = skipnr + 1,
/* skip this function if they are tracing us */
.skip = skipnr + !!(current == tsk),
};
if (!try_get_task_stack(tsk))
@ -298,7 +299,8 @@ unsigned int stack_trace_save_tsk(struct task_struct *task,
struct stack_trace trace = {
.entries = store,
.max_entries = size,
.skip = skipnr + 1,
/* skip this function if they are tracing us */
.skip = skipnr + !!(current == task),
};
save_stack_trace_tsk(task, &trace);