From: Takashi Iwai tiwai@suse.de
stable inclusion from stable-v5.10.150 commit bc1d16d282bca421c6fc31de4b8fd412010f01bd category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I6D0XA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 6382da0828995af87aa8b8bef28cc61aceb4aff3 upstream.
When the driver hits -ENOMEM at allocating a URB or a buffer, it aborts and goes to the error path that releases the all previously allocated resources. However, when -ENOMEM hits at the middle of the sync EP URB allocation loop, the partially allocated URBs might be left without released, because ep->nurbs is still zero at that point.
Fix it by setting ep->nurbs at first, so that the error handler loops over the full URB list.
Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20220930100151.19461-1-tiwai@suse.de Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Jialin Zhang zhangjialin11@huawei.com --- sound/usb/endpoint.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c index 8527267725bb..655b6d30e998 100644 --- a/sound/usb/endpoint.c +++ b/sound/usb/endpoint.c @@ -998,6 +998,7 @@ static int sync_ep_set_params(struct snd_usb_endpoint *ep) if (!ep->syncbuf) return -ENOMEM;
+ ep->nurbs = SYNC_URBS; for (i = 0; i < SYNC_URBS; i++) { struct snd_urb_ctx *u = &ep->urb[i]; u->index = i; @@ -1017,8 +1018,6 @@ static int sync_ep_set_params(struct snd_usb_endpoint *ep) u->urb->complete = snd_complete_urb; }
- ep->nurbs = SYNC_URBS; - return 0;
out_of_memory: