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Subject[GIT pull] core/urgent for v5.4-rc7
Linus,

please pull the latest core-urgent-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git core-urgent-for-linus

up to: b0c51f158455: stacktrace: Don't skip first entry on noncurrent tasks

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.

Thanks,

tglx

------------------>
Jiri Slaby (1):
stacktrace: Don't skip first entry on noncurrent tasks


kernel/stacktrace.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c
index 6d1f68b7e528..c9ea7eb2cb1a 100644
--- a/kernel/stacktrace.c
+++ b/kernel/stacktrace.c
@@ -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);

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