============================================ WARNING: possible recursive locking detected 5.13.0-rc5-syzkaller #0 Not tainted -------------------------------------------- kworker/u4:0/9 is trying to acquire lock: ffff888041926130 (&runtime->sleep){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] ffff888041926130 (&runtime->sleep){..-.}-{2:2}, at: io_poll_double_wake+0x246/0x810 fs/io_uring.c:4975 but task is already holding lock: ffff8880273d8130 (&runtime->sleep){..-.}-{2:2}, at: __wake_up_common_lock+0xb4/0x130 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 5 locks held by kworker/u4:0/9: #0: ffff8880256a1938 ((wq_completion)phy9){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8880256a1938 ((wq_completion)phy9){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff8880256a1938 ((wq_completion)phy9){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff8880256a1938 ((wq_completion)phy9){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline] #0: ffff8880256a1938 ((wq_completion)phy9){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff8880256a1938 ((wq_completion)phy9){+.+.}-{0:0}, at: process_one_work+0x771/0x13b0 kernel/workqueue.c:2247 #1: ffffc90000ce7db0 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0x13b0 kernel/workqueue.c:2251 #2: ffff88804199cd00 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1003 [inline] #2: ffff88804199cd00 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x8d/0xcd0 net/mac80211/ibss.c:1683 #3: ffff888022e9d108 (&group->lock){..-.}-{2:2}, at: snd_pcm_period_elapsed+0x17/0x1c0 sound/core/pcm_lib.c:1799 #4: ffff8880273d8130 (&runtime->sleep){..-.}-{2:2}, at: __wake_up_common_lock+0xb4/0x130 kernel/sched/wait.c:137 stack backtrace: CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.13.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy9 ieee80211_iface_work Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0xa5/0xe6 lib/dump_stack.c:120 print_deadlock_bug kernel/locking/lockdep.c:2831 [inline] check_deadlock kernel/locking/lockdep.c:2874 [inline] validate_chain kernel/locking/lockdep.c:3663 [inline] __lock_acquire.cold+0x149/0x399 kernel/locking/lockdep.c:4902 lock_acquire kernel/locking/lockdep.c:5512 [inline] lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] io_poll_double_wake+0x246/0x810 fs/io_uring.c:4975 __wake_up_common+0x147/0x650 kernel/sched/wait.c:108 __wake_up_common_lock+0xd0/0x130 kernel/sched/wait.c:138 snd_pcm_update_state+0x381/0x4e0 sound/core/pcm_lib.c:203 snd_pcm_update_hw_ptr0+0x73b/0x1a20 sound/core/pcm_lib.c:464 snd_pcm_period_elapsed+0x10d/0x1c0 sound/core/pcm_lib.c:1805 dummy_hrtimer_callback+0x7a/0x170 sound/drivers/dummy.c:377 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x4d7/0xb00 kernel/time/hrtimer.c:1601 hrtimer_run_softirq+0x176/0x340 kernel/time/hrtimer.c:1618 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559 invoke_softirq kernel/softirq.c:433 [inline] __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:191 Code: 74 24 10 e8 ba 22 06 f9 48 89 ef e8 52 9b 06 f9 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 c3 95 fa f8 65 8b 05 1c 99 b5 77 85 c0 74 0a 5b 5d c3 e8 c0 60 RSP: 0018:ffffc90000ce7888 EFLAGS: 00000206 RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff1c89eea RDX: 0000000000000000 RSI: ffffffff88ab0480 RDI: 0000000000000001 RBP: ffff8880ba026380 R08: 0000000000000001 R09: ffffffff8e429907 R10: 0000000000000001 R11: 0000000000000001 R12: ffff888024280d00 R13: 1ffff9200019cf19 R14: ffff8880242831e0 R15: ffff8880242831e0 hrtimer_start include/linux/hrtimer.h:422 [inline] mac80211_hwsim_bss_info_changed+0xbac/0xdd0 drivers/net/wireless/mac80211_hwsim.c:2026 drv_bss_info_changed+0x194/0x430 net/mac80211/driver-ops.h:177 __ieee80211_sta_join_ibss+0x9bc/0x1430 net/mac80211/ibss.c:381 ieee80211_sta_create_ibss.cold+0xb5/0x101 net/mac80211/ibss.c:1354 ieee80211_sta_find_ibss net/mac80211/ibss.c:1484 [inline] ieee80211_ibss_work.cold+0x23b/0x4c6 net/mac80211/ibss.c:1708 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2276 worker_thread+0x598/0xf80 kernel/workqueue.c:2422 kthread+0x36f/0x450 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294