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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-07-02 17:53:35 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-07-03 09:04:06 +0200 |
| commit | 7e8e6816c6495a1168f9a7a50125d82c23e59300 (patch) | |
| tree | d608fc97cbbec910699dd53f473cb9813caad020 | |
| parent | 6fbc7275c7a9ba97877050335f290341a1fd8dbf (diff) | |
| download | linux-7e8e6816c6495a1168f9a7a50125d82c23e59300.tar.gz linux-7e8e6816c6495a1168f9a7a50125d82c23e59300.tar.bz2 linux-7e8e6816c6495a1168f9a7a50125d82c23e59300.zip | |
stacktrace: Use PF_KTHREAD to check for kernel threads
!current->mm is not a reliable indicator for kernel threads as they might
temporarily use a user mm. Check for PF_KTHREAD instead.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1907021750100.1802@nanos.tec.linutronix.de
| -rw-r--r-- | kernel/stacktrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c index 36139de0a3c4..c8d0f05721a1 100644 --- a/kernel/stacktrace.c +++ b/kernel/stacktrace.c @@ -228,7 +228,7 @@ unsigned int stack_trace_save_user(unsigned long *store, unsigned int size) }; /* Trace user stack if not a kernel thread */ - if (!current->mm) + if (current->flags & PF_KTHREAD) return 0; arch_stack_walk_user(consume_entry, &c, task_pt_regs(current)); |