diff options
| author |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-02 15:19:56 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2023-02-06 09:29:30 -0700 |
| commit | 83e8864fee26f63a7435e941b7c36a20fd6fe93e (patch) | |
| tree | 25ec837d60fb12bc8b6692d46294fa384188ab46 | |
| parent | blk-mq: correct stale comment of .get_budget (diff) | |
| download | wireguard-linux-83e8864fee26f63a7435e941b7c36a20fd6fe93e.tar.xz wireguard-linux-83e8864fee26f63a7435e941b7c36a20fd6fe93e.zip | |
trace/blktrace: fix memory leak with using debugfs_lookup()
When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time. To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic
at once.
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: linux-block@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-trace-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230202141956.2299521-1-gregkh@linuxfoundation.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | kernel/trace/blktrace.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index 918a7d12df8f..5743be559415 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -320,8 +320,8 @@ static void blk_trace_free(struct request_queue *q, struct blk_trace *bt) * under 'q->debugfs_dir', thus lookup and remove them. */ if (!bt->dir) { - debugfs_remove(debugfs_lookup("dropped", q->debugfs_dir)); - debugfs_remove(debugfs_lookup("msg", q->debugfs_dir)); + debugfs_lookup_and_remove("dropped", q->debugfs_dir); + debugfs_lookup_and_remove("msg", q->debugfs_dir); } else { debugfs_remove(bt->dir); } |