Messages in this thread Patch in this message | | | Date | Tue, 2 Jul 2019 17:53:35 +0200 (CEST) | From | Thomas Gleixner <> | Subject | [PATCH] stacktrace: Use PF_KTHREAD to check for kernel threads |
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!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> --- --- a/kernel/stacktrace.c +++ b/kernel/stacktrace.c @@ -228,7 +228,7 @@ unsigned int stack_trace_save_user(unsig }; /* 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));
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