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| author | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2026-06-25 08:34:46 +0900 |
|---|---|---|
| committer | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2026-06-30 23:58:19 +0900 |
| commit | cda1fbfc5313bb90daa271d45eea4a8d317a8544 (patch) | |
| tree | 93f527e1a7a6b3848b6c0dfcc0cf7eb5cc9992d7 /samples | |
| parent | 251a8fe1b9aedccd298b77bc28426d564c5a923f (diff) | |
| download | linux-cda1fbfc5313bb90daa271d45eea4a8d317a8544.tar.gz linux-cda1fbfc5313bb90daa271d45eea4a8d317a8544.zip | |
tracing/events: Fix to check the simple_tsk_fn creation
Sashiko pointed that this sample code does not correctly handle the
failure of thread creation because kthread_run() can return -errno.
Check the simple_tsk_fn is correctly initialized (created) or not.
Link: https://lore.kernel.org/all/178165817322.269421.3992299509400184196.stgit@devnote2/
Link: https://sashiko.dev/#/patchset/178092865666.163648.10457567771536160909.stgit%40devnote2
Fixes: 9cfe06f8cd5c ("tracing/events: add trace-events-sample")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/trace_events/trace-events-sample.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/samples/trace_events/trace-events-sample.c b/samples/trace_events/trace-events-sample.c index ecc7db237f2e..0b7a6efdb247 100644 --- a/samples/trace_events/trace-events-sample.c +++ b/samples/trace_events/trace-events-sample.c @@ -107,6 +107,10 @@ int foo_bar_reg(void) * for consistency sake, we still take the thread_mutex. */ simple_tsk_fn = kthread_run(simple_thread_fn, NULL, "event-sample-fn"); + if (IS_ERR_OR_NULL(simple_tsk_fn)) { + pr_err("Failed to create simple_thread_fn\n"); + simple_tsk_fn = NULL; + } out: mutex_unlock(&thread_mutex); return 0; |