watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.0:8766] Modules linked in: irq event stamp: 101654610 hardirqs last enabled at (101654609): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (101654609): [] _raw_spin_unlock_irqrestore+0x34/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (101654610): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (4328236): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4328145): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 8766 Comm: syz-executor.0 Not tainted 5.10.56 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:207 [inline] RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline] RIP: 0010:test_ti_thread_flag include/linux/thread_info.h:97 [inline] RIP: 0010:test_tsk_thread_flag include/linux/sched.h:1838 [inline] RIP: 0010:signal_pending include/linux/sched/signal.h:359 [inline] RIP: 0010:io_run_task_work_sig+0xbc/0x2e0 fs/io_uring.c:6983 Code: 08 00 00 00 65 48 8b 1c 25 40 ef 01 00 48 89 df e8 d9 da e6 ff 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 d2 01 00 00 48 8b 1b 31 ff 45 31 e4 48 c1 eb 02 83 e3 01 48 RSP: 0018:ffff888059e6fd88 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff888015938000 RCX: ffffffff8183b827 RDX: 1ffff11002b27000 RSI: 0000000000000008 RDI: ffff888015938000 RBP: ffff88800c62a780 R08: 0000000000000000 R09: ffff888015938007 R10: ffffed1002b27000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff888047b36000 R14: ffff888047b36450 R15: ffff888047b36000 FS: 00007fc1a445f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc1a445ed80 CR3: 000000005121c000 CR4: 0000000000350ef0 Call Trace: io_cqring_wait fs/io_uring.c:7042 [inline] __do_sys_io_uring_enter+0x826/0x1910 fs/io_uring.c:9116 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466609 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:00007fc1a445f188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609 RDX: 000000000000a349 RSI: 0000000000006828 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000020000180 R09: 0000000000000008 R10: 0000000000000003 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd9fa4ad5f R14: 00007fc1a445f300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8771 Comm: syz-executor.6 Not tainted 5.10.56 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:strlen+0x54/0x90 lib/string.c:568 Code: 75 48 80 7d 00 00 74 39 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 01 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a <38> ca 7f 04 84 d2 75 1f 80 38 00 75 de 48 83 c4 08 48 29 e8 5b 5d RSP: 0018:ffff888059b67bb8 EFLAGS: 00000002 RAX: ffffffff842f45ca RBX: dffffc0000000000 RCX: 0000000000000002 RDX: 0000000000000003 RSI: ffff8880489b8468 RDI: ffffffff842f45c0 RBP: ffffffff842f45c0 R08: 0000000000000000 R09: ffffffff8544fb4f R10: fffffbfff0a89f69 R11: 0000000000000001 R12: ffff8880489b8468 R13: ffff8880489b8000 R14: ffffffff84cfcac0 R15: ffff888059b67c88 FS: 00007fd27fa75700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f222000 CR3: 0000000048456000 CR4: 0000000000350ee0 Call Trace: strlen include/linux/string.h:321 [inline] trace_event_get_offsets_lock include/trace/events/lock.h:39 [inline] perf_trace_lock+0xac/0x490 include/trace/events/lock.h:39 trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x46c/0x6b0 kernel/locking/lockdep.c:5571 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_unlock_irqrestore+0x16/0x40 kernel/locking/spinlock.c:191 io_cqring_wait fs/io_uring.c:7052 [inline] __do_sys_io_uring_enter+0xded/0x1910 fs/io_uring.c:9116 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466609 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:00007fd27fa75188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 0000000000466609 RDX: 000000000000a349 RSI: 0000000000006828 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000020000180 R09: 0000000000000008 R10: 0000000000000003 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe714253af R14: 00007fd27fa75300 R15: 0000000000022000