watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz-executor.4:26917] Modules linked in: irq event stamp: 11820185 hardirqs last enabled at (11820184): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 hardirqs last disabled at (11820185): [] sysvec_apic_timer_interrupt+0xa/0xb0 arch/x86/kernel/apic/apic.c:1100 softirqs last enabled at (10700446): [] invoke_softirq kernel/softirq.c:433 [inline] softirqs last enabled at (10700446): [] __irq_exit_rcu+0x245/0x280 kernel/softirq.c:637 softirqs last disabled at (10700449): [] invoke_softirq kernel/softirq.c:433 [inline] softirqs last disabled at (10700449): [] __irq_exit_rcu+0x245/0x280 kernel/softirq.c:637 CPU: 1 PID: 26917 Comm: syz-executor.4 Not tainted 5.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_acquire+0x1f6/0x720 kernel/locking/lockdep.c:5516 Code: f6 84 24 a1 00 00 00 02 0f 85 8d 02 00 00 f7 c3 00 02 00 00 49 bd 00 00 00 00 00 fc ff df 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 4b c7 44 3d 09 00 00 00 00 43 c7 44 3d RSP: 0018:ffffc90000dc06a0 EFLAGS: 00000206 RAX: 1ffff920001b80e8 RBX: 0000000000000246 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000000 RBP: ffffc90000dc0820 R08: dffffc0000000000 R09: fffffbfff204d7b1 R10: fffffbfff204d7b1 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001b80dc FS: 00007efdb844b700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2ef22000 CR3: 0000000081b31000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:267 rcu_read_lock include/linux/rcupdate.h:657 [inline] __ieee80211_beacon_get+0xb6/0x1e80 net/mac80211/tx.c:4765 ieee80211_beacon_get_tim+0xb7/0x830 net/mac80211/tx.c:4950 ieee80211_beacon_get include/net/mac80211.h:4938 [inline] mac80211_hwsim_beacon_tx+0xe0/0x870 drivers/net/wireless/mac80211_hwsim.c:1799 __iterate_interfaces+0x23e/0x4b0 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0x9b/0x120 net/mac80211/util.c:829 mac80211_hwsim_beacon+0xa4/0x180 drivers/net/wireless/mac80211_hwsim.c:1852 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1601 hrtimer_run_softirq+0x176/0x1e0 kernel/time/hrtimer.c:1618 __do_softirq+0x372/0x7a6 kernel/softirq.c:559 invoke_softirq kernel/softirq.c:433 [inline] __irq_exit_rcu+0x245/0x280 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 RIP: 0010:lock_acquire+0x1f6/0x720 kernel/locking/lockdep.c:5516 Code: f6 84 24 a1 00 00 00 02 0f 85 8d 02 00 00 f7 c3 00 02 00 00 49 bd 00 00 00 00 00 fc ff df 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 4b c7 44 3d 09 00 00 00 00 43 c7 44 3d RSP: 0018:ffffc90001adfa80 EFLAGS: 00000206 RAX: 1ffff9200035bf64 RBX: 0000000000000246 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc90001adfbf8 R08: dffffc0000000000 R09: fffffbfff204d7b3 R10: fffffbfff204d7b3 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff9200035bf58 __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] task_lock include/linux/sched/task.h:168 [inline] chroot_fs_refs+0xbf/0x5c0 fs/fs_struct.c:66 __do_sys_pivot_root fs/namespace.c:3811 [inline] __se_sys_pivot_root+0x1ef5/0x2060 fs/namespace.c:3728 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007efdb844b188 EFLAGS: 00000246 ORIG_RAX: 000000000000009b RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000020000180 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffd8d7fd20f R14: 00007efdb844b300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10118 Comm: kworker/u4:6 Not tainted 5.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound call_usermodehelper_exec_work RIP: 0010:queued_write_lock_slowpath+0x161/0x480 kernel/locking/qrwlock.c:78 Code: 43 8a 04 2e 84 c0 0f 85 ad 00 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 8b 07 3d 00 01 00 00 74 36 f3 90 43 0f b6 04 2e <84> c0 74 eb 44 89 f9 80 e1 07 80 c1 03 38 c1 7c de 4c 89 ff e8 86 RSP: 0018:ffffc90001b3f560 EFLAGS: 00000006 RAX: 0000000000000000 RBX: 1ffff92000367eb6 RCX: ffffffff8163304a RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8cc0a040 RBP: ffffc90001b3f610 R08: dffffc0000000000 R09: fffffbfff1981409 R10: fffffbfff1981409 R11: 0000000000000000 R12: ffffc90001b3f5b0 R13: dffffc0000000000 R14: 1ffffffff1981408 R15: ffffffff8cc0a040 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005575f42b4b58 CR3: 0000000017b89000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: queued_write_lock include/asm-generic/qrwlock.h:97 [inline] do_raw_write_lock+0x38a/0x4e0 kernel/locking/spinlock_debug.c:207 __raw_write_lock_irq include/linux/rwlock_api_smp.h:197 [inline] _raw_write_lock_irq+0xba/0xf0 kernel/locking/spinlock.c:311 copy_process+0x306c/0x57f0 kernel/fork.c:2235 kernel_clone+0x21a/0x7d0 kernel/fork.c:2503 kernel_thread+0x146/0x1c0 kernel/fork.c:2555 call_usermodehelper_exec_work+0x57/0x220 kernel/umh.c:174 process_one_work+0x833/0x10c0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294