ALSA: firewire: fix NULL pointer dereference when releasing uninitialized data of...
authorTakashi Sakamoto <o-takashi@sakamocchi.jp>
Sun, 20 Aug 2017 06:54:26 +0000 (15:54 +0900)
committerTakashi Iwai <tiwai@suse.de>
Sun, 20 Aug 2017 07:40:32 +0000 (09:40 +0200)
commit0c264af7be2013266c5b4c644f3f366399ee490a
tree1ce199398500fc7ae35fa15f894d2fbd50d24cb2
parent0b36f2bd28d040acedb52f4327eb2441afe4f514
ALSA: firewire: fix NULL pointer dereference when releasing uninitialized data of iso-resource

When calling 'iso_resource_free()' for uninitialized data, this function
causes NULL pointer dereference due to its 'unit' member. This occurs when
unplugging audio and music units on IEEE 1394 bus at failure of card
registration.

This commit fixes the bug. The bug exists since kernel v4.5.

Fixes: 324540c4e05c ('ALSA: fireface: postpone sound card registration') at v4.12
Fixes: 8865a31e0fd8 ('ALSA: firewire-motu: postpone sound card registration') at v4.12
Fixes: b610386c8afb ('ALSA: firewire-tascam: deleyed registration of sound card') at v4.7
Fixes: 86c8dd7f4da3 ('ALSA: firewire-digi00x: delayed registration of sound card') at v4.7
Fixes: 6c29230e2a5f ('ALSA: oxfw: delayed registration of sound card') at v4.7
Fixes: 7d3c1d5901aa ('ALSA: fireworks: delayed registration of sound card') at v4.7
Fixes: 04a2c73c97eb ('ALSA: bebob: delayed registration of sound card') at v4.7
Fixes: b59fb1900b4f ('ALSA: dice: postpone card registration') at v4.5
Cc: <stable@vger.kernel.org> # v4.5+
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/firewire/iso-resources.c