Takashi Iwai 5c06d68bc2 ALSA: usb-audio: Avoid calling usb_autopm_put_interface() at disconnect ... ALSA PCM may still have a leftover instance after disconnection and it delays its release. The problem is that the PCM close code path of USB-audio driver has a call of snd_usb_autosuspend(). This involves with the call of usb_autopm_put_interface() and it may lead to a kernel Oops due to the NULL object like: BUG: unable to handle kernel NULL pointer dereference at 0000000000000190 IP: [<ffffffff815ae7ef>] usb_autopm_put_interface+0xf/0x30 PGD 0 Call Trace: [<ffffffff8173bd94>] snd_usb_autosuspend+0x14/0x20 [<ffffffff817461bc>] snd_usb_pcm_close.isra.14+0x5c/0x90 [<ffffffff8174621f>] snd_usb_playback_close+0xf/0x20 [<ffffffff816ef58a>] snd_pcm_release_substream.part.36+0x3a/0x90 [<ffffffff816ef6b3>] snd_pcm_release+0xa3/0xb0 [<ffffffff816debb0>] snd_disconnect_release+0xd0/0xe0 [<ffffffff8114d417>] __fput+0x97/0x1d0 [<ffffffff8114d589>] ____fput+0x9/0x10 [<ffffffff8109e452>] task_work_run+0x72/0x90 [<ffffffff81088510>] do_exit+0x280/0xa80 [<ffffffff8108996a>] do_group_exit+0x3a/0xa0 [<ffffffff8109261f>] get_signal+0x1df/0x540 [<ffffffff81040903>] do_signal+0x23/0x620 [<ffffffff8114c128>] ? do_readv_writev+0x128/0x200 [<ffffffff810012e1>] prepare_exit_to_usermode+0x91/0xd0 [<ffffffff810013ba>] syscall_return_slowpath+0x9a/0x120 [<ffffffff817587cd>] ? __sys_recvmsg+0x5d/0x70 [<ffffffff810d2765>] ? ktime_get_ts64+0x45/0xe0 [<ffffffff8115dea0>] ? SyS_poll+0x60/0xf0 [<ffffffff818d2327>] int_ret_from_sys_call+0x25/0x8f We have already a check of disconnection in snd_usb_autoresume(), but the check is missing its counterpart. The fix is just to put the same check in snd_usb_autosuspend(), too. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=109431 Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>		2016-01-12 14:12:38 +01:00
..
aoa
arm
atmel
core	ALSA: oss: consolidate kmalloc/memset 0 call to kzalloc	2015-12-20 22:31:02 +01:00
drivers	ALSA: dummy: constify dummy_timer_ops structures	2015-12-30 22:49:42 +01:00
firewire	ALSA: dice: expand timeout to wait for Dice notification	2016-01-06 10:18:54 +01:00
hda	ASoC: Last updates for v4.5	2016-01-11 17:50:15 +01:00
i2c	ALSA: i2c: constify snd_i2c_ops structures	2015-11-30 11:40:08 +01:00
isa
mips
oss	sound/oss: remove VIRT_TO_BUS dependency	2015-12-09 14:40:51 +01:00
parisc
pci	ALSA: hda - Fixup inverted internal mic for Lenovo E50-80	2016-01-11 10:02:31 +01:00
pcmcia
ppc
sh
soc	ASoC: Last updates for v4.5	2016-01-11 17:50:15 +01:00
sparc
spi
synth	ALSA: emux: constify nrpn_conv_table structures	2016-01-06 10:19:49 +01:00
usb	ALSA: usb-audio: Avoid calling usb_autopm_put_interface() at disconnect	2016-01-12 14:12:38 +01:00
ac97_bus.c
Kconfig
last.c
Makefile
sound_core.c
sound_firmware.c