From: Steven Rostedt <[email protected]> If a user space stacktrace is requested when running a kernel thread, just return, as there's no point trying to get the user space stacktrace as there is no user space.
Signed-off-by: Steven Rostedt (Google) <[email protected]> --- Changes since v5: https://lore.kernel.org/[email protected] - Also add check for PF_USER_WORKER to test for kernel thread kernel/trace/trace.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 1b7db732c0b1..2cca29c9863d 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -3138,6 +3138,10 @@ ftrace_trace_userstack(struct trace_array *tr, if (!(tr->trace_flags & TRACE_ITER_USERSTACKTRACE)) return; + /* No point doing user space stacktraces on kernel threads */ + if (current->flags & (PF_KTHREAD | PF_USER_WORKER)) + return; + /* * NMIs can not handle page faults, even with fix ups. * The save user stack can (and often does) fault. -- 2.50.1
