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Bug 1430023 - snd/pcm: fix snd_pcm_stream_lock*() irqs_disabled() splats
snd/pcm: fix snd_pcm_stream_lock*() irqs_disabled() splats
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: kernel-rt (Show other bugs)
7.4
Unspecified Unspecified
medium Severity medium
: rc
: ---
Assigned To: John Kacur
Jiri Kastner
:
Depends On:
Blocks: 1353018 1410158
  Show dependency tree / graph
 
Reported: 2017-03-07 11:50 EST by John Kacur
Modified: 2017-08-01 20:25 EDT (History)
5 users (show)

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Last Closed: 2017-08-01 15:02:59 EDT
Type: Bug
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Attachments (Terms of Use)
snd/pcm: fix snd_pcm_stream_lock*() irqs_disabled() splats (2.86 KB, patch)
2017-03-13 14:25 EDT, John Kacur 		no flags Details | Diff
Add an attachment (proposed patch, testcase, etc.)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:2077 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2017-08-01 14:13:37 EDT

  None (edit)
Description John Kacur 2017-03-07 11:50:13 EST 
Locking functions previously using read_lock_irq()/read_lock_irqsave() were
changed to local_irq_disable/save(), leading to gripes.  Use nort variants.

|BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:915
|in_atomic(): 0, irqs_disabled(): 1, pid: 5947, name: alsa-sink-ALC88
|CPU: 5 PID: 5947 Comm: alsa-sink-ALC88 Not tainted 3.18.7-rt1 #9
|Hardware name: MEDION MS-7848/MS-7848, BIOS M7848W08.404 11/06/2014
| ffff880409316240 ffff88040866fa38 ffffffff815bdeb5 0000000000000002
| 0000000000000000 ffff88040866fa58 ffffffff81073c86 ffffffffa03b2640
| ffff88040239ec00 ffff88040866fa78 ffffffff815c3d34 ffffffffa03b2640
|Call Trace:
| [<ffffffff815bdeb5>] dump_stack+0x4f/0x9e
| [<ffffffff81073c86>] __might_sleep+0xe6/0x150
| [<ffffffff815c3d34>] __rt_spin_lock+0x24/0x50
| [<ffffffff815c4044>] rt_read_lock+0x34/0x40
| [<ffffffffa03a2979>] snd_pcm_stream_lock+0x29/0x70 [snd_pcm]
| [<ffffffffa03a355d>] snd_pcm_playback_poll+0x5d/0x120 [snd_pcm]
| [<ffffffff811937a2>] do_sys_poll+0x322/0x5b0
| [<ffffffff81193d48>] SyS_ppoll+0x1a8/0x1c0
| [<ffffffff815c4556>] system_call_fastpath+0x16/0x1b

Signed-off-by: Mike Galbraith <umgwanakikbuti@gmail.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Comment 2 John Kacur 2017-03-13 14:25 EDT 
Created attachment 1262542 [details]
snd/pcm: fix snd_pcm_stream_lock*() irqs_disabled() splats
Comment 6 John Kacur 2017-04-20 20:30:35 EDT 
Fixed with d2128c5514137dc62ed32f1403d22f7f11bafa83
Comment 9 errata-xmlrpc 2017-08-01 15:02:59 EDT 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2017:2077
Comment 10 errata-xmlrpc 2017-08-01 20:25:36 EDT 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2017:2077
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