ALSA: dice: fix null pointer dereference when node is disconnected
authorTakashi Sakamoto <o-takashi@sakamocchi.jp>
Fri, 12 Mar 2021 09:34:07 +0000 (18:34 +0900)
committerTakashi Iwai <tiwai@suse.de>
Fri, 12 Mar 2021 13:12:53 +0000 (14:12 +0100)
commitdd7b836d6bc935df95c826f69ff4d051f5561604
treecba8741ea510f6bd20110069f2830f3622292d93
parent2bf44e0ee95f39cc54ea1b942f0a027e0181ca4e
ALSA: dice: fix null pointer dereference when node is disconnected

When node is removed from IEEE 1394 bus, any transaction fails to the node.
In the case, ALSA dice driver doesn't stop isochronous contexts even if
they are running. As a result, null pointer dereference occurs in callback
from the running context.

This commit fixes the bug to release isochronous contexts always.

Cc: <stable@vger.kernel.org> # v5.4 or later
Fixes: e9f21129b8d8 ("ALSA: dice: support AMDTP domain")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210312093407.23437-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/firewire/dice/dice-stream.c