diff options
| author | Chris Wulff <Chris.Wulff@biamp.com> | 2024-04-25 18:20:20 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-16 14:28:42 +0300 |
| commit | 4591a1764ac7e1aaeddded3fa99041594ac8e266 (patch) | |
| tree | 51e6d57e8cb63e98d7811b677609486431e54402 /drivers | |
| parent | eba6b40877d587aa26fe25e6d42a4ced10b8a371 (diff) | |
| download | linux-4591a1764ac7e1aaeddded3fa99041594ac8e266.tar.xz | |
usb: gadget: u_audio: Clear uac pointer when freed.
[ Upstream commit a2cf936ebef291ef7395172b9e2f624779fb6dc0 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -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 53b30de16a89..994316d51a0e 100644 --- a/drivers/usb/gadget/function/u_audio.c +++ b/drivers/usb/gadget/function/u_audio.c @@ -624,6 +624,8 @@ 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); |