watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.6:20426] Modules linked in: irq event stamp: 101195484 hardirqs last enabled at (101195483): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (101195483): [] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (101195484): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (3740): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (3685): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 20426 Comm: syz-executor.6 Not tainted 5.10.158 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:prepare_to_wait_exclusive+0x1a/0x2a0 kernel/sched/wait.c:262 Code: f0 47 00 48 8b 14 24 eb 82 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 41 54 49 89 fc 55 48 63 ea 53 <48> 89 f3 48 83 ec 50 48 c7 44 24 10 b3 8a b5 41 4c 8d 6c 24 10 48 RSP: 0018:ffff88800dff7d68 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: dffffc0000000000 RCX: ffffc9000523c000 RDX: 0000000000000001 RSI: ffff88800dff7e90 RDI: ffff88801d3ce450 RBP: 0000000000000001 R08: 0000000000000000 R09: ffff88801d3ce35f R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801d3ce450 R13: ffff88801d3ce000 R14: ffff88801d3ce450 R15: ffff88801d3ce000 FS: 00007f9cff82c700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d523000 CR3: 00000000466b8000 CR4: 0000000000350ef0 Call Trace: io_cqring_wait fs/io_uring.c:7043 [inline] __do_sys_io_uring_enter+0x825/0x1920 fs/io_uring.c:9171 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f9d022b6b19 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:00007f9cff82c188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f9d023c9f60 RCX: 00007f9d022b6b19 RDX: 0000000000004220 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00007f9d02310f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffcea0b1ef R14: 00007f9cff82c300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 20460 Comm: syz-executor.6 Not tainted 5.10.158 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__lock_release kernel/locking/lockdep.c:5272 [inline] RIP: 0010:lock_release+0x2d0/0x6b0 kernel/locking/lockdep.c:5585 Code: 04 02 84 c0 74 08 3c 03 0f 8e 22 03 00 00 48 89 da 45 89 a7 a8 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 75 03 00 00 49 8d bf a0 08 00 00 48 8b 1b 48 b8 00 00 00 00 RSP: 0018:ffff88804d527c38 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff88801b39eeb0 RCX: ffff88804d527c88 RDX: 1ffff11003673dd6 RSI: 0000000000000000 RDI: ffff88801b39eed2 RBP: 1ffff11009aa4f89 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000001 R14: ffff88801b39eea8 R15: ffff88801b39e600 FS: 00007f9cff7ea700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbb22f2c718 CR3: 00000000466b8000 CR4: 0000000000350ee0 Call Trace: __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_unlock_irqrestore+0x16/0x40 kernel/locking/spinlock.c:191 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] prepare_to_wait_exclusive+0x129/0x2a0 kernel/sched/wait.c:273 io_cqring_wait fs/io_uring.c:7043 [inline] __do_sys_io_uring_enter+0x825/0x1920 fs/io_uring.c:9171 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f9d022b6b19 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:00007f9cff7ea188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f9d023ca0e0 RCX: 00007f9d022b6b19 RDX: 0000000000004220 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00007f9d02310f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffcea0b1ef R14: 00007f9cff7ea300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: f0 47 00 48 8b lock rex.RXB add %r9b,-0x75(%r8) 5: 14 24 adc $0x24,%al 7: eb 82 jmp 0xffffff8b 9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 10: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 17: fc ff df 1a: 41 57 push %r15 1c: 41 56 push %r14 1e: 41 55 push %r13 20: 41 54 push %r12 22: 49 89 fc mov %rdi,%r12 25: 55 push %rbp 26: 48 63 ea movslq %edx,%rbp 29: 53 push %rbx * 2a: 48 89 f3 mov %rsi,%rbx <-- trapping instruction 2d: 48 83 ec 50 sub $0x50,%rsp 31: 48 c7 44 24 10 b3 8a movq $0x41b58ab3,0x10(%rsp) 38: b5 41 3a: 4c 8d 6c 24 10 lea 0x10(%rsp),%r13 3f: 48 rex.W