Commit e7e58df8 authored by Eldad Zack's avatar Eldad Zack Committed by Takashi Iwai
Browse files

ALSA: usb-audio: WARN_ON when alts is passed as NULL

Prevent NULL dereference in snd_usb_add_endpoints(), when
alts is passed as NULL. In this case, WARN (since this is
a non-fatal bug) and return NULL ep. Call sites treat a NULL
return value as an error.

Signed-off-by: default avatarEldad Zack <>
Signed-off-by: default avatarTakashi Iwai <>
parent 88abb8ef
......@@ -418,6 +418,9 @@ struct snd_usb_endpoint *snd_usb_add_endpoint(struct snd_usb_audio *chip,
struct snd_usb_endpoint *ep;
int is_playback = direction == SNDRV_PCM_STREAM_PLAYBACK;
if (WARN_ON(!alts))
return NULL;
list_for_each_entry(ep, &chip->ep_list, list) {
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