watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.1:17616] Modules linked in: irq event stamp: 89478426 hardirqs last enabled at (89478425): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (89478425): [] _raw_spin_unlock_irqrestore+0x34/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (89478426): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (34673236): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (34673137): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 17616 Comm: syz-executor.1 Not tainted 5.10.123 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:84 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191 Code: 80 00 00 00 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 9a ff 47 fd 48 89 ef e8 82 b7 48 fd f6 c7 02 75 0c 53 9d <65> ff 0d 84 d9 23 7c 5b 5d c3 e8 dc 4b 67 fd eb ed 66 2e 0f 1f 84 RSP: 0018:ffff8880522bfd88 EFLAGS: 00000206 RAX: 0000000005555519 RBX: 0000000000000206 RCX: 1ffffffff0a8d8b1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83de95c4 RBP: ffff88801763c450 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff88801763c000 R14: ffff88801763c450 R15: ffff88801763c000 FS: 00007f86f1e46700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d322000 CR3: 0000000042e94000 CR4: 0000000000350ee0 Call Trace: io_cqring_wait fs/io_uring.c:7039 [inline] __do_sys_io_uring_enter+0xded/0x1900 fs/io_uring.c:9112 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f86f48d0b19 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:00007f86f1e46188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f86f49e3f60 RCX: 00007f86f48d0b19 RDX: 000000000000128e RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f86f492af6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff639ec66f R14: 00007f86f1e46300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 17639 Comm: syz-executor.3 Not tainted 5.10.123 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:mark_held_locks+0xa/0xe0 kernel/locking/lockdep.c:4117 Code: 48 c7 c7 78 09 47 85 e8 24 da 44 00 e9 e1 e7 ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 b8 00 00 00 00 00 fc ff df <41> 56 41 55 41 54 41 89 f4 55 48 89 fd 48 81 c7 a8 08 00 00 53 48 RSP: 0018:ffff888033c67cc0 EFLAGS: 00000002 RAX: dffffc0000000000 RBX: ffff888045ee0000 RCX: 1ffffffff0a8d8b1 RDX: 1ffff11008bdc111 RSI: 0000000000000002 RDI: ffff888045ee0000 RBP: ffff888045ee0000 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888044511450 R13: 1ffff1100678cfa5 R14: 0000000000000202 R15: ffff888033c67ea8 FS: 00007f666f018700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cf20000 CR3: 0000000044358000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __trace_hardirqs_on_caller kernel/locking/lockdep.c:4151 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4219 [inline] lockdep_hardirqs_on_prepare+0x129/0x3e0 kernel/locking/lockdep.c:4171 trace_hardirqs_on+0x5b/0x180 kernel/trace/trace_preemptirq.c:49 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x34/0x40 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:7026 [inline] __do_sys_io_uring_enter+0x821/0x1900 fs/io_uring.c:9112 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f6671aa2b19 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:00007f666f018188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f6671bb5f60 RCX: 00007f6671aa2b19 RDX: 000000000000128e RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f6671afcf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe4f9cdf0f R14: 00007f666f018300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 80 00 00 addb $0x0,(%rax) 3: 00 00 add %al,(%rax) 5: 55 push %rbp 6: 48 89 fd mov %rdi,%rbp 9: 48 83 c7 18 add $0x18,%rdi d: 53 push %rbx e: 48 89 f3 mov %rsi,%rbx 11: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 16: e8 9a ff 47 fd callq 0xfd47ffb5 1b: 48 89 ef mov %rbp,%rdi 1e: e8 82 b7 48 fd callq 0xfd48b7a5 23: f6 c7 02 test $0x2,%bh 26: 75 0c jne 0x34 28: 53 push %rbx 29: 9d popfq * 2a: 65 ff 0d 84 d9 23 7c decl %gs:0x7c23d984(%rip) # 0x7c23d9b5 <-- trapping instruction 31: 5b pop %rbx 32: 5d pop %rbp 33: c3 retq 34: e8 dc 4b 67 fd callq 0xfd674c15 39: eb ed jmp 0x28 3b: 66 data16 3c: 2e cs 3d: 0f .byte 0xf 3e: 1f (bad) 3f: 84 .byte 0x84