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Takashi Iwai 66efdc71d9 ALSA: seq: Fix missing error handling in snd_seq_timer_open() 
snd_seq_timer_open() didn't catch the whole error path but let through
if the timer id is a slave.  This may lead to Oops by accessing the
uninitialized pointer.

 BUG: unable to handle kernel NULL pointer dereference at 00000000000002ae
 IP: [<ffffffff819b3477>] snd_seq_timer_open+0xe7/0x130
 PGD 785cd067 PUD 76964067 PMD 0
 Oops: 0002 [#4] SMP
 CPU 0
 Pid: 4288, comm: trinity-child7 Tainted: G      D W 3.9.0-rc1+ #100 Bochs Bochs
 RIP: 0010:[<ffffffff819b3477>]  [<ffffffff819b3477>] snd_seq_timer_open+0xe7/0x130
 RSP: 0018:ffff88006ece7d38  EFLAGS: 00010246
 RAX: 0000000000000286 RBX: ffff88007851b400 RCX: 0000000000000000
 RDX: 000000000000ffff RSI: ffff88006ece7d58 RDI: ffff88006ece7d38
 RBP: ffff88006ece7d98 R08: 000000000000000a R09: 000000000000fffe
 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
 R13: ffff8800792c5400 R14: 0000000000e8f000 R15: 0000000000000007
 FS:  00007f7aaa650700(0000) GS:ffff88007f800000(0000) GS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 00000000000002ae CR3: 000000006efec000 CR4: 00000000000006f0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
 Process trinity-child7 (pid: 4288, threadinfo ffff88006ece6000, task ffff880076a8a290)
 Stack:
  0000000000000286 ffffffff828f2be0 ffff88006ece7d58 ffffffff810f354d
  65636e6575716573 2065756575712072 ffff8800792c0030 0000000000000000
  ffff88006ece7d98 ffff8800792c5400 ffff88007851b400 ffff8800792c5520
 Call Trace:
  [<ffffffff810f354d>] ? trace_hardirqs_on+0xd/0x10
  [<ffffffff819b17e9>] snd_seq_queue_timer_open+0x29/0x70
  [<ffffffff819ae01a>] snd_seq_ioctl_set_queue_timer+0xda/0x120
  [<ffffffff819acb9b>] snd_seq_do_ioctl+0x9b/0xd0
  [<ffffffff819acbe0>] snd_seq_ioctl+0x10/0x20
  [<ffffffff811b9542>] do_vfs_ioctl+0x522/0x570
  [<ffffffff8130a4b3>] ? file_has_perm+0x83/0xa0
  [<ffffffff810f354d>] ? trace_hardirqs_on+0xd/0x10
  [<ffffffff811b95ed>] sys_ioctl+0x5d/0xa0
  [<ffffffff813663fe>] ? trace_hardirqs_on_thunk+0x3a/0x3f
  [<ffffffff81faed69>] system_call_fastpath+0x16/0x1b

Reported-and-tested-by: Tommi Rantala <tt.rantala@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
 		2013-03-11 09:40:36 +01:00
..
aoa
…
arm ALSA: pxa27x: rename pxa27x_assert_ac97reset() 2013-01-08 11:30:08 +00:00
atmel ALSA: atmel: remove __dev* attributes 2012-12-07 07:22:12 +01:00
core ALSA: seq: Fix missing error handling in snd_seq_timer_open() 2013-03-11 09:40:36 +01:00
drivers Merge branch 'for-linus' into for-next 2013-02-05 14:48:03 +01:00
firewire ALSA: firewire-speakers: remove __dev* attributes 2012-12-07 07:29:30 +01:00
i2c ALSA: Fix typo in drivers sound 2012-11-04 09:20:58 +01:00
isa ALSA: Remove the rest of __devinit* in comments 2012-12-07 07:41:56 +01:00
mips ALSA: mips: remove __dev* attributes 2012-12-07 07:29:45 +01:00
oss new helper: file_inode(file) 2013-02-22 23:31:31 -05:00
parisc ALSA: parisc/harmony: remove __dev* attributes 2012-12-07 07:30:11 +01:00
pci ALSA: ice1712: Initialize card->private_data properly 2013-03-07 15:38:58 +01:00
pcmcia
…
ppc ALSA: ppc: remove __dev* attributes 2012-12-07 07:33:30 +01:00
sh ALSA: sh: remove __dev* attributes 2012-12-07 07:33:47 +01:00
soc Merge remote-tracking branch 'asoc/fix/wm8960' into tmp 2013-03-07 14:29:43 +08:00
sparc ALSA: sparc: remove __dev* attributes 2012-12-07 07:34:04 +01:00
spi ALSA: at73c213: remove __dev* attributes 2012-12-07 07:34:13 +01:00
synth
…
usb ALSA: usb/quirks, fix out-of-bounds access 2013-02-17 18:02:00 +01:00
Kconfig sound: remove reference to feature-removal-schedule.txt 2012-12-17 17:15:12 -08:00
Makefile
…
ac97_bus.c
…
last.c
…
sound_core.c sound: remove reference to feature-removal-schedule.txt 2012-12-17 17:15:12 -08:00
sound_firmware.c new helper: file_inode(file) 2013-02-22 23:31:31 -05:00