watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.3:26111] Modules linked in: irq event stamp: 75870924 hardirqs last enabled at (75870923): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (75870923): [] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (75870924): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (10430662): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (10430651): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 26111 Comm: syz-executor.3 Not tainted 5.10.155 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 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: 3e 00 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 5a f4 44 fd 48 89 ef e8 32 ae 45 fd f6 c7 02 75 10 53 9d <65> ff 0d 44 6f 20 7c 5b 5d e9 fd 3f 3e 00 e8 a8 79 64 fd eb e9 66 RSP: 0018:ffff88804b01fd88 EFLAGS: 00000206 RAX: 000000000485b2cb RBX: 0000000000000206 RCX: 1ffffffff0acdb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e20008 RBP: ffff8880449ca450 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff8880449ca000 R14: ffff8880449ca450 R15: ffff8880449ca000 FS: 00007fbd4290f700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d525000 CR3: 000000004c610000 CR4: 0000000000350ee0 Call Trace: io_cqring_wait fs/io_uring.c:7055 [inline] __do_sys_io_uring_enter+0xdf1/0x1920 fs/io_uring.c:9131 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fbd45399b19 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:00007fbd4290f188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fbd454acf60 RCX: 00007fbd45399b19 RDX: 000000000000cab0 RSI: 0000000000003421 RDI: 0000000000000003 RBP: 00007fbd453f3f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9ebdd39f R14: 00007fbd4290f300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 26444 Comm: syz-executor.3 Not tainted 5.10.155 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:trace_lock_acquire include/trace/events/lock.h:13 [inline] RIP: 0010:lock_acquire+0xbc/0x490 kernel/locking/lockdep.c:5536 Code: 08 00 00 00 48 89 d0 48 89 54 24 08 48 c1 f8 06 48 8d 3c c5 88 0c 67 85 e8 81 ab 44 00 48 8b 54 24 08 48 0f a3 15 dc 10 40 04 <0f> 82 28 03 00 00 48 c7 c0 bc 1c 67 85 48 ba 00 00 00 00 00 fc ff RSP: 0018:ffff88803bcefc58 EFLAGS: 00000047 RAX: 0000000000000001 RBX: 1ffff1100779df8d RCX: ffffffff8126fb9f RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff85670c88 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff85670c8f R10: fffffbfff0ace191 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88804b787468 R15: 0000000000000000 FS: 00007fbd428cd700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbd428cd718 CR3: 000000004c610000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x36/0x60 kernel/locking/spinlock.c:159 finish_wait+0xb2/0x210 kernel/sched/wait.c:392 io_cqring_wait fs/io_uring.c:7055 [inline] __do_sys_io_uring_enter+0xdf1/0x1920 fs/io_uring.c:9131 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fbd45399b19 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:00007fbd428cd188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fbd454ad0e0 RCX: 00007fbd45399b19 RDX: 000000000000cab0 RSI: 0000000000003421 RDI: 0000000000000003 RBP: 00007fbd453f3f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe9ebdd39f R14: 00007fbd428cd300 R15: 0000000000022000 hpet: Lost 2 RTC interrupts ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 0f 1f 00 nopl (%rax) 3: 55 push %rbp 4: 48 89 fd mov %rdi,%rbp 7: 48 83 c7 18 add $0x18,%rdi b: 53 push %rbx c: 48 89 f3 mov %rsi,%rbx f: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 14: e8 5a f4 44 fd callq 0xfd44f473 19: 48 89 ef mov %rbp,%rdi 1c: e8 32 ae 45 fd callq 0xfd45ae53 21: f6 c7 02 test $0x2,%bh 24: 75 10 jne 0x36 26: 53 push %rbx 27: 9d popfq * 28: 65 ff 0d 44 6f 20 7c decl %gs:0x7c206f44(%rip) # 0x7c206f73 <-- trapping instruction 2f: 5b pop %rbx 30: 5d pop %rbp 31: e9 fd 3f 3e 00 jmpq 0x3e4033 36: e8 a8 79 64 fd callq 0xfd6479e3 3b: eb e9 jmp 0x26 3d: 66 data16