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authorTakashi Iwai <tiwai@suse.de>2022-09-30 12:01:51 +0200
committerTakashi Iwai <tiwai@suse.de>2022-09-30 12:02:54 +0200
commit6382da0828995af87aa8b8bef28cc61aceb4aff3 (patch)
tree2340b2642debfcd79a4c0139650e07f8826db173 /sound
parent568be8aaf8a535f79c4db76cabe17b035aa2584d (diff)
ALSA: usb-audio: Fix potential memory leaks
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/usb/endpoint.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 36f753a28341..48a3843a08f1 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -1268,6 +1268,7 @@ 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;
@@ -1287,8 +1288,6 @@ 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: