Takashi Iwai d3f823518b ALSA: sb: Fix potential ABBA deadlock in CSP driver ... commit 1c2b951915 upstream. SB16 CSP driver may hit potentially a typical ABBA deadlock in two code paths: In snd_sb_csp_stop(): spin_lock_irqsave(&p->chip->mixer_lock, flags); spin_lock(&p->chip->reg_lock); In snd_sb_csp_load(): spin_lock_irqsave(&p->chip->reg_lock, flags); spin_lock(&p->chip->mixer_lock); Also the similar pattern is seen in snd_sb_csp_start(). Although the practical impact is very small (those states aren't triggered in the same running state and this happens only on a real hardware, decades old ISA sound boards -- which must be very difficult to find nowadays), it's a real scenario and has to be fixed. This patch addresses those deadlocks by splitting the locks in snd_sb_csp_start() and snd_sb_csp_stop() for avoiding the nested locks. Reported-by: Jia-Ju Bai <baijiaju1990@gmail.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/7b0fcdaf-cd4f-4728-2eae-48c151a92e10@gmail.com Link: https://lore.kernel.org/r/20210716132723.13216-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-07-28 11:12:18 +02:00
..
ad1816a
ad1848
cs423x	ALSA: cs4236: fix error return comparison of an unsigned integer	2020-01-09 10:17:56 +01:00
es1688	ALSA: es1688: Add the missed snd_card_free()	2020-06-20 10:25:00 +02:00
galaxy
gus
msnd
opti9xx	ALSA: opti9xx: shut up gcc-10 range warning	2020-05-05 19:15:52 +02:00
sb	ALSA: sb: Fix potential ABBA deadlock in CSP driver	2021-07-28 11:12:18 +02:00
wavefront	ALSA: isa/wavefront: prevent out of bounds write in ioctl	2020-06-25 15:41:48 +02:00
wss	ALSA: wss: Fix invalid snd_free_pages() at error path	2018-12-05 19:41:24 +01:00
adlib.c
als100.c
azt2320.c
cmi8328.c
cmi8330.c	ALSA: isa: Fix error return code in snd_cmi8330_probe()	2021-07-20 16:17:54 +02:00
es18xx.c
Kconfig
Makefile
opl3sa2.c
sc6000.c
sscape.c