| Summary: | possible recursive locking detected | ||
|---|---|---|---|
| Product: | PulseAudio | Reporter: | almos <aaalmosss> |
| Component: | misc | Assignee: | pulseaudio-bugs |
| Status: | RESOLVED NOTOURBUG | QA Contact: | pulseaudio-bugs |
| Severity: | normal | ||
| Priority: | medium | CC: | lennart |
| Version: | unspecified | ||
| Hardware: | Other | ||
| OS: | All | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
I believe this is a locking issue in the kernel, not in PulseAudio, so I'm closing this bug. If you have a reason to believe otherwise, please reopen the bug. Oh, and the reason I think this is a kernel bug is that the log message identifies the problematic lock as follows: (&(&substream->self_group.lock)->rlock/1) That refers to an in-kernel lock, not any lock that is directly used by PulseAudio. |
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syslog: Oct 5 15:48:53 fxa kernel: [ 199.766955] Oct 5 15:48:53 fxa kernel: [ 199.766959] ============================================= Oct 5 15:48:53 fxa kernel: [ 199.766961] [ INFO: possible recursive locking detected ] Oct 5 15:48:53 fxa kernel: [ 199.766963] 3.10.13-fxa #1 Not tainted Oct 5 15:48:53 fxa kernel: [ 199.766964] --------------------------------------------- Oct 5 15:48:53 fxa kernel: [ 199.766966] pulseaudio/5108 is trying to acquire lock: Oct 5 15:48:53 fxa kernel: [ 199.766967] (&(&substream->self_group.lock)->rlock/1){......}, at: [<ffffffffa02a d57a>] snd_pcm_action_group+0x64/0x1cd [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.766978] Oct 5 15:48:53 fxa kernel: [ 199.766978] but task is already holding lock: Oct 5 15:48:53 fxa kernel: [ 199.766980] (&(&substream->self_group.lock)->rlock/1){......}, at: [<ffffffffa02a d57a>] snd_pcm_action_group+0x64/0x1cd [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.766986] Oct 5 15:48:53 fxa kernel: [ 199.766986] other info that might help us debug this: Oct 5 15:48:53 fxa kernel: [ 199.766988] Possible unsafe locking scenario: Oct 5 15:48:53 fxa kernel: [ 199.766988] Oct 5 15:48:53 fxa kernel: [ 199.766989] CPU0 Oct 5 15:48:53 fxa kernel: [ 199.766990] ---- Oct 5 15:48:53 fxa kernel: [ 199.766991] lock(&(&substream->self_group.lock)->rlock/1); Oct 5 15:48:53 fxa kernel: [ 199.766993] lock(&(&substream->self_group.lock)->rlock/1); Oct 5 15:48:53 fxa kernel: [ 199.766994] Oct 5 15:48:53 fxa kernel: [ 199.766994] *** DEADLOCK *** Oct 5 15:48:53 fxa kernel: [ 199.766994] Oct 5 15:48:53 fxa kernel: [ 199.766996] May be due to missing lock nesting notation Oct 5 15:48:53 fxa kernel: [ 199.766996] Oct 5 15:48:53 fxa kernel: [ 199.766998] 4 locks held by pulseaudio/5108: Oct 5 15:48:53 fxa kernel: [ 199.766998] #0: (snd_pcm_link_rwlock){......}, at: [<ffffffffa02acf46>] snd_pcm_ stream_lock_irq+0x14/0x23 [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767004] #1: (&(&substream->self_group.lock)->rlock){......}, at: [<ffffffffa 02acf52>] snd_pcm_stream_lock_irq+0x20/0x23 [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767009] #2: (&(&substream->group->lock)->rlock){......}, at: [<ffffffffa02ae 386>] snd_pcm_action+0x2b/0x85 [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767015] #3: (&(&substream->self_group.lock)->rlock/1){......}, at: [<fffffff fa02ad57a>] snd_pcm_action_group+0x64/0x1cd [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767021] Oct 5 15:48:53 fxa kernel: [ 199.767021] stack backtrace: Oct 5 15:48:53 fxa kernel: [ 199.767023] CPU: 3 PID: 5108 Comm: pulseaudio Not tainted 3.10.13-fxa #1 Oct 5 15:48:53 fxa kernel: [ 199.767024] Hardware name: Gigabyte Technology Co., Ltd. GA-990FXA-UD3/GA-990FXA-U D3, BIOS F5 10/13/2011 Oct 5 15:48:53 fxa kernel: [ 199.767026] 0000000000000000 ffff88041a27dc00 ffffffff81360159 ffff88041a27dca8 Oct 5 15:48:53 fxa kernel: [ 199.767029] ffffffff810789f6 ffff880400000001 ffff880400000000 ffffffff81c2b720 Oct 5 15:48:53 fxa kernel: [ 199.767032] 0000000000000002 49724c12809424a1 ffff88041a248788 ffff88041a27dcf0 Oct 5 15:48:53 fxa kernel: [ 199.767034] Call Trace: Oct 5 15:48:53 fxa kernel: [ 199.767039] [<ffffffff81360159>] dump_stack+0x19/0x1b Oct 5 15:48:53 fxa kernel: [ 199.767043] [<ffffffff810789f6>] __lock_acquire+0xbff/0xd92 Oct 5 15:48:53 fxa kernel: [ 199.767045] [<ffffffff8107817e>] ? __lock_acquire+0x387/0xd92 Oct 5 15:48:53 fxa kernel: [ 199.767047] [<ffffffff810783dd>] ? __lock_acquire+0x5e6/0xd92 Oct 5 15:48:53 fxa kernel: [ 199.767049] [<ffffffff81078ea6>] lock_acquire+0xa3/0x11a Oct 5 15:48:53 fxa kernel: [ 199.767054] [<ffffffffa02ad57a>] ? snd_pcm_action_group+0x64/0x1cd [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767057] [<ffffffff813636b5>] _raw_spin_lock_nested+0x36/0x42 Oct 5 15:48:53 fxa kernel: [ 199.767062] [<ffffffffa02ad57a>] ? snd_pcm_action_group+0x64/0x1cd [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767066] [<ffffffffa02ad57a>] snd_pcm_action_group+0x64/0x1cd [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767071] [<ffffffffa02ae3bc>] snd_pcm_action+0x61/0x85 [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767075] [<ffffffffa02ae3f5>] snd_pcm_stop+0x15/0x17 [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767080] [<ffffffffa02af1c4>] snd_pcm_drop+0x69/0x7f [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767084] [<ffffffffa02b08a8>] snd_pcm_common_ioctl1+0x87e/0xad1 [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767086] [<ffffffff8107817e>] ? __lock_acquire+0x387/0xd92 Oct 5 15:48:53 fxa kernel: [ 199.767091] [<ffffffffa02b0d0e>] snd_pcm_playback_ioctl1+0x213/0x230 [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767096] [<ffffffffa02b0d55>] snd_pcm_playback_ioctl+0x2a/0x2e [snd_pcm] Oct 5 15:48:53 fxa kernel: [ 199.767099] [<ffffffff81118465>] vfs_ioctl+0x18/0x34 Oct 5 15:48:53 fxa kernel: [ 199.767101] [<ffffffff81118cb2>] do_vfs_ioctl+0x38d/0x44b Oct 5 15:48:53 fxa kernel: [ 199.767104] [<ffffffff81120777>] ? rcu_read_unlock+0x1c/0x2d Oct 5 15:48:53 fxa kernel: [ 199.767107] [<ffffffff81118dc2>] SyS_ioctl+0x52/0x7d Oct 5 15:48:53 fxa kernel: [ 199.767109] [<ffffffff8111b92a>] ? dput+0x3f/0x114 Oct 5 15:48:53 fxa kernel: [ 199.767112] [<ffffffff813695d6>] system_call_fastpath+0x1a/0x1f Oct 5 15:48:53 fxa pulseaudio[5108]: [pulseaudio] sink.c: Default and alternate sample rates are the same.