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 --- v1: Split from https://lore.kernel.org/linux-usb/CO1PR17MB54190B898057616EEB3F9E51E10E2@CO1...

drivers/usb/gadget/function/u_audio.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/gadget/function/u_audio.c b/drivers/usb/gadget/function/u_audio.c index c8e8154c59f5..ec1dceb08729 100644 --- a/drivers/usb/gadget/function/u_audio.c +++ b/drivers/usb/gadget/function/u_audio.c @@ -1419,6 +1419,8 @@ 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);