diff options
| author | Chris Wulff | 2024-04-25 15:20:20 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2024-05-04 18:26:08 +0200 |
| commit | a2cf936ebef291ef7395172b9e2f624779fb6dc0 (patch) | |
| tree | a983447d1da014cd4051dbff8a9988003695881f | |
| parent | 1b739388aa3f8dfb63a9fca777e6dfa6912d0464 (diff) | |
usb: gadget: u_audio: Clear uac pointer when freed.
This prevents use of a stale pointer if functions are called after
g_cleanup that shouldn't be. This doesn't fix any races, but converts
a possibly silent kernel memory corruption into an obvious NULL pointer
dereference report.
Fixes: eb9fecb9e69b ("usb: gadget: f_uac2: split out audio core")
Signed-off-by: Chris Wulff <chris.wulff@biamp.com>
Link: https://lore.kernel.org/stable/CO1PR17MB54194226DA08BFC9EBD8C163E1172%40CO1PR17MB5419.namprd17.prod.outlook.com
Link: https://lore.kernel.org/r/CO1PR17MB54194226DA08BFC9EBD8C163E1172@CO1PR17MB5419.namprd17.prod.outlook.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/gadget/function/u_audio.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/u_audio.c b/drivers/usb/gadget/function/u_audio.c index efa3e3100333..89af0feb7512 100644 --- a/drivers/usb/gadget/function/u_audio.c +++ b/drivers/usb/gadget/function/u_audio.c @@ -1420,6 +1420,8 @@ void g_audio_cleanup(struct g_audio *g_audio) return; uac = g_audio->uac; + g_audio->uac = NULL; + card = uac->card; if (card) snd_card_free_when_closed(card); |