6.6-stable review patch. If anyone has any objections, please let me know.
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From: Masami Hiramatsu (Google) mhiramat@kernel.org
[ Upstream commit 494b332064c0ce2f7392fa92632bc50191c1b517 ]
Fix eprobe event to unregister event call and release eprobe when it fails to add dynamic event correctly.
Link: https://lore.kernel.org/all/173289886698.73724.1959899350183686006.stgit@dev...
Fixes: 7491e2c44278 ("tracing: Add a probe that attaches to trace events") Signed-off-by: Masami Hiramatsu (Google) mhiramat@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/trace/trace_eprobe.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/kernel/trace/trace_eprobe.c b/kernel/trace/trace_eprobe.c index 31bb977670bdf..f1f12ce5efb0a 100644 --- a/kernel/trace/trace_eprobe.c +++ b/kernel/trace/trace_eprobe.c @@ -966,6 +966,11 @@ static int __trace_eprobe_create(int argc, const char *argv[]) goto error; } ret = dyn_event_add(&ep->devent, &ep->tp.event->call); + if (ret < 0) { + trace_probe_unregister_event_call(&ep->tp); + mutex_unlock(&event_mutex); + goto error; + } mutex_unlock(&event_mutex); return ret; parse_error: