diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index dff6329b94ac..3cfb60b4770b 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1171,6 +1171,13 @@ ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, int pc) if (!(trace_flags & TRACE_ITER_USERSTACKTRACE)) return; + /* + * NMIs can not handle page faults, even with fix ups. + * The save user stack can (and often does) fault. + */ + if (unlikely(in_nmi())) + return; + event = trace_buffer_lock_reserve(buffer, TRACE_USER_STACK, sizeof(*entry), flags, pc); if (!event) |