| commit | 7c32ae35fbf9cffb7aa3736f44dec10c944ca18e | [log] [tgz] |
|---|---|---|
| author | Takashi Iwai <tiwai@suse.de> | Fri Apr 12 11:37:19 2019 +0200 |
| committer | Takashi Iwai <tiwai@suse.de> | Fri Apr 12 12:50:10 2019 +0200 |
| tree | a1a2a0b1ef3c07979c4bfb8869f97c971580d157 | |
| parent | f0654ba94e33699b295ce4f3dc73094db6209035 [diff] |
ALSA: seq: Cover unsubscribe_port() in list_mutex The call of unsubscribe_port() which manages the group count and module refcount from delete_and_unsubscribe_port() looks racy; it's not covered by the group list lock, and it's likely a cause of the reported unbalance at port deletion. Let's move the call inside the group list_mutex to plug the hole. Reported-by: syzbot+e4c8abb920efa77bace9@syzkaller.appspotmail.com Signed-off-by: Takashi Iwai <tiwai@suse.de>