============================================ WARNING: possible recursive locking detected 5.16.0-rc5-syzkaller #0 Not tainted -------------------------------------------- syz-executor000/3592 is trying to acquire lock: ffff8881475ab130 (&runtime->sleep){....}-{2:2}, at: io_poll_double_wake+0x2be/0x820 fs/io_uring.c:5463 fs/io_uring.c:5463 but task is already holding lock: ffff888147d25130 (&runtime->sleep){....}-{2:2}, at: __wake_up_common_lock+0xb4/0x130 kernel/sched/wait.c:137 kernel/sched/wait.c:137 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&runtime->sleep); lock(&runtime->sleep); *** DEADLOCK *** May be due to missing lock nesting notation 3 locks held by syz-executor000/3592: #0: ffff888147d25440 (&runtime->oss.params_lock){+.+.}-{3:3}, at: snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1101 [inline] #0: ffff888147d25440 (&runtime->oss.params_lock){+.+.}-{3:3}, at: snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1101 [inline] sound/core/oss/pcm_oss.c:1121 #0: ffff888147d25440 (&runtime->oss.params_lock){+.+.}-{3:3}, at: snd_pcm_oss_get_active_substream+0x142/0x1c0 sound/core/oss/pcm_oss.c:1121 sound/core/oss/pcm_oss.c:1121 #1: ffff88814b037110 (&group->lock){....}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:374 [inline] #1: ffff88814b037110 (&group->lock){....}-{2:2}, at: snd_pcm_group_lock_irq sound/core/pcm_native.c:97 [inline] #1: ffff88814b037110 (&group->lock){....}-{2:2}, at: snd_pcm_stream_lock_irq sound/core/pcm_native.c:136 [inline] #1: ffff88814b037110 (&group->lock){....}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:374 [inline] sound/core/pcm_native.c:2150 #1: ffff88814b037110 (&group->lock){....}-{2:2}, at: snd_pcm_group_lock_irq sound/core/pcm_native.c:97 [inline] sound/core/pcm_native.c:2150 #1: ffff88814b037110 (&group->lock){....}-{2:2}, at: snd_pcm_stream_lock_irq sound/core/pcm_native.c:136 [inline] sound/core/pcm_native.c:2150 #1: ffff88814b037110 (&group->lock){....}-{2:2}, at: snd_pcm_drop+0x131/0x320 sound/core/pcm_native.c:2150 sound/core/pcm_native.c:2150 #2: ffff888147d25130 (&runtime->sleep){....}-{2:2}, at: __wake_up_common_lock+0xb4/0x130 kernel/sched/wait.c:137 kernel/sched/wait.c:137 stack backtrace: CPU: 1 PID: 3592 Comm: syz-executor000 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] __dump_stack lib/dump_stack.c:88 [inline] lib/dump_stack.c:106 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 lib/dump_stack.c:106 print_deadlock_bug kernel/locking/lockdep.c:2956 [inline] check_deadlock kernel/locking/lockdep.c:2999 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] print_deadlock_bug kernel/locking/lockdep.c:2956 [inline] kernel/locking/lockdep.c:5027 check_deadlock kernel/locking/lockdep.c:2999 [inline] kernel/locking/lockdep.c:5027 validate_chain kernel/locking/lockdep.c:3788 [inline] kernel/locking/lockdep.c:5027 __lock_acquire.cold+0x149/0x3ab kernel/locking/lockdep.c:5027 kernel/locking/lockdep.c:5027 lock_acquire kernel/locking/lockdep.c:5637 [inline] lock_acquire kernel/locking/lockdep.c:5637 [inline] kernel/locking/lockdep.c:5602 lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602 kernel/locking/lockdep.c:5602 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] kernel/locking/spinlock.c:162 _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 kernel/locking/spinlock.c:162 io_poll_double_wake+0x2be/0x820 fs/io_uring.c:5463 fs/io_uring.c:5463 __wake_up_common+0x147/0x650 kernel/sched/wait.c:108 kernel/sched/wait.c:108 __wake_up_common_lock+0xd0/0x130 kernel/sched/wait.c:138 kernel/sched/wait.c:138 snd_pcm_post_stop+0xb9/0x1f0 sound/core/pcm_native.c:1455 sound/core/pcm_native.c:1455 snd_pcm_action_single sound/core/pcm_native.c:1229 [inline] snd_pcm_action_single sound/core/pcm_native.c:1229 [inline] sound/core/pcm_native.c:1310 snd_pcm_action+0x143/0x170 sound/core/pcm_native.c:1310 sound/core/pcm_native.c:1310 snd_pcm_stop sound/core/pcm_native.c:1476 [inline] snd_pcm_stop sound/core/pcm_native.c:1476 [inline] sound/core/pcm_native.c:2155 snd_pcm_drop+0x1ab/0x320 sound/core/pcm_native.c:2155 sound/core/pcm_native.c:2155 snd_pcm_kernel_ioctl+0x2af/0x310 sound/core/pcm_native.c:3382 sound/core/pcm_native.c:3382 snd_pcm_oss_change_params_locked+0x13b8/0x3bf0 sound/core/oss/pcm_oss.c:958 sound/core/oss/pcm_oss.c:958 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1104 [inline] snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1104 [inline] sound/core/oss/pcm_oss.c:1121 snd_pcm_oss_get_active_substream+0x164/0x1c0 sound/core/oss/pcm_oss.c:1121 sound/core/oss/pcm_oss.c:1121 snd_pcm_oss_get_rate sound/core/oss/pcm_oss.c:1778 [inline] snd_pcm_oss_set_rate sound/core/oss/pcm_oss.c:1770 [inline] snd_pcm_oss_get_rate sound/core/oss/pcm_oss.c:1778 [inline] sound/core/oss/pcm_oss.c:2632 snd_pcm_oss_set_rate sound/core/oss/pcm_oss.c:1770 [inline] sound/core/oss/pcm_oss.c:2632 snd_pcm_oss_ioctl+0x144f/0x3430 sound/core/oss/pcm_oss.c:2632 sound/core/oss/pcm_oss.c:2632 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] vfs_ioctl fs/ioctl.c:51 [inline] fs/ioctl.c:860 __do_sys_ioctl fs/ioctl.c:874 [inline] fs/ioctl.c:860 __se_sys_ioctl fs/ioctl.c:860 [inline] fs/ioctl.c:860 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_x64 arch/x86/entry/common.c:50 [inline] arch/x86/entry/common.c:80 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f55de7ac229 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffec0f5d428 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f55de7ac229 RDX: 0000000020000240 RSI: 00000000c0045002 RDI: 0000000000000004 RBP: 00007f55de770210 R08: 0000000000000000 R09: 000000000000