wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 ====================================================== WARNING: possible circular locking dependency detected 6.6.0-rc4-next-20231005-syzkaller #0 Not tainted ------------------------------------------------------ kworker/1:0/23 is trying to acquire lock: ffff888079824578 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline] ffff888079824578 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x15d0 kernel/sched/core.c:4213 but task is already holding lock: ffffffff8cb98e18 ((console_sem).lock){-...}-{2:2}, at: up+0x16/0xb0 kernel/locking/semaphore.c:187 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 ((console_sem).lock){-...}-{2:2}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 down_trylock+0x12/0x70 kernel/locking/semaphore.c:139 __down_trylock_console_sem+0x40/0x140 kernel/printk/printk.c:323 console_trylock+0x73/0x130 kernel/printk/printk.c:2652 console_trylock_spinning kernel/printk/printk.c:1924 [inline] vprintk_emit+0x162/0x5f0 kernel/printk/printk.c:2303 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2329 pick_eevdf kernel/sched/fair.c:963 [inline] check_preempt_wakeup_fair+0x553/0x640 kernel/sched/fair.c:8108 wakeup_preempt+0x125/0x320 kernel/sched/core.c:2217 ttwu_do_activate+0x24f/0xd90 kernel/sched/core.c:3767 ttwu_queue kernel/sched/core.c:4008 [inline] try_to_wake_up+0x6bc/0x15d0 kernel/sched/core.c:4329 hrtimer_wakeup+0x47/0x60 kernel/time/hrtimer.c:1942 __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x203/0xc10 kernel/time/hrtimer.c:1752 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1063 [inline] __sysvec_apic_timer_interrupt+0x105/0x3f0 arch/x86/kernel/apic/apic.c:1080 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1074 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 __sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:527 orc_find arch/x86/kernel/unwind_orc.c:206 [inline] unwind_next_frame+0x1c3/0x2390 arch/x86/kernel/unwind_orc.c:494 __unwind_start+0x5a4/0x880 arch/x86/kernel/unwind_orc.c:760 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xaf/0x170 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:492 kvfree_call_rcu+0x70/0xbe0 kernel/rcu/tree.c:3385 kernfs_unlink_open_file+0x3b6/0x4b0 fs/kernfs/file.c:584 kernfs_fop_release+0xec/0x1e0 fs/kernfs/file.c:756 __fput+0x406/0xb60 fs/file_table.c:401 __fput_sync+0x47/0x50 fs/file_table.c:482 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __x64_sys_close+0x87/0xf0 fs/open.c:1557 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&rq->__lock){-.-.}-{2:2}: _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558 raw_spin_rq_lock kernel/sched/sched.h:1357 [inline] rq_lock kernel/sched/sched.h:1671 [inline] task_fork_fair+0x70/0x240 kernel/sched/fair.c:12399 sched_cgroup_fork+0x3cf/0x510 kernel/sched/core.c:4799 copy_process+0x4580/0x74b0 kernel/fork.c:2609 kernel_clone+0xfd/0x920 kernel/fork.c:2907 user_mode_thread+0xb4/0xf0 kernel/fork.c:2985 rest_init+0x27/0x2b0 init/main.c:691 arch_call_rest_init+0x13/0x30 init/main.c:823 start_kernel+0x39f/0x480 init/main.c:1068 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:556 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:537 secondary_startup_64_no_verify+0x166/0x16b -> #0 (&p->pi_lock){-.-.}-{2:2}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline] try_to_wake_up+0xb0/0x15d0 kernel/sched/core.c:4213 up+0x79/0xb0 kernel/locking/semaphore.c:191 __up_console_sem kernel/printk/printk.c:340 [inline] __console_unlock kernel/printk/printk.c:2699 [inline] console_unlock+0x1cf/0x260 kernel/printk/printk.c:3031 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2304 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2329 ieee80211_sta_find_ibss net/mac80211/ibss.c:1447 [inline] ieee80211_ibss_work+0xbae/0x14b0 net/mac80211/ibss.c:1666 ieee80211_iface_work+0xbdf/0xd90 net/mac80211/iface.c:1657 cfg80211_wiphy_work+0x24e/0x330 net/wireless/core.c:435 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 other info that might help us debug this: Chain exists of: &p->pi_lock --> &rq->__lock --> (console_sem).lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock((console_sem).lock); lock(&rq->__lock); lock((console_sem).lock); lock(&p->pi_lock); *** DEADLOCK *** 4 locks held by kworker/1:0/23: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605 #1: ffffc900001d7d80 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606 #2: ffff88802c588768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5870 [inline] #2: ffff88802c588768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: cfg80211_wiphy_work+0x2b/0x330 net/wireless/core.c:422 #3: ffffffff8cb98e18 ((console_sem).lock){-...}-{2:2}, at: up+0x16/0xb0 kernel/locking/semaphore.c:187 stack backtrace: CPU: 1 PID: 23 Comm: kworker/1:0 Not tainted 6.6.0-rc4-next-20231005-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 Workqueue: events cfg80211_wiphy_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 check_noncircular+0x311/0x3f0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3868 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5136 lock_acquire kernel/locking/lockdep.c:5753 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:518 [inline] try_to_wake_up+0xb0/0x15d0 kernel/sched/core.c:4213 up+0x79/0xb0 kernel/locking/semaphore.c:191 __up_console_sem kernel/printk/printk.c:340 [inline] __console_unlock kernel/printk/printk.c:2699 [inline] console_unlock+0x1cf/0x260 kernel/printk/printk.c:3031 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2304 vprintk+0x7b/0x90 kernel/printk/printk_safe.c:45 _printk+0xc8/0x100 kernel/printk/printk.c:2329 ieee80211_sta_find_ibss net/mac80211/ibss.c:1447 [inline] ieee80211_ibss_work+0xbae/0x14b0 net/mac80211/ibss.c:1666 ieee80211_iface_work+0xbdf/0xd90 net/mac80211/iface.c:1657 cfg80211_wiphy_work+0x24e/0x330 net/wireless/core.c:435 process_one_work+0x884/0x15c0 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50