watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.2:7639] Modules linked in: irq event stamp: 77362050 hardirqs last enabled at (77362049): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (77362049): [] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (77362050): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (102036): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (101935): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 7639 Comm: syz-executor.2 Not tainted 5.10.161 #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 ea c5 44 fd 48 89 ef e8 c2 7f 45 fd f6 c7 02 75 10 53 9d <65> ff 0d 44 3d 20 7c 5b 5d e9 fd 0d 3e 00 e8 d8 51 64 fd eb e9 66 RSP: 0018:ffff88803aea7d00 EFLAGS: 00000202 RAX: 00000000049c7381 RBX: 0000000000000202 RCX: 1ffffffff0acdae9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e23208 RBP: ffff888044a8d450 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888044a8d450 R13: 1ffff110075d4fa5 R14: 0000000000000202 R15: ffff88803aea7ea8 FS: 00007fda2bfed700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d227000 CR3: 000000001b50a000 CR4: 0000000000350ef0 Call Trace: 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: 0033:0x7fda2ea77b19 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:00007fda2bfed188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fda2eb8af60 RCX: 00007fda2ea77b19 RDX: 0000000000009b4e RSI: 000000000000690e RDI: 0000000000000004 RBP: 00007fda2ead1f6d R08: 0000000020000340 R09: 0000000000000008 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffe32f3f0f R14: 00007fda2bfed300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7635 Comm: syz-executor.1 Not tainted 5.10.161 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:finish_wait+0x6c/0x210 kernel/sched/wait.c:377 Code: 90 13 00 00 30 db 23 81 48 b8 00 00 00 00 00 fc ff df 65 48 8b 2c 25 80 6f 02 00 48 8d 7d 10 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 3b 01 00 00 48 c7 45 10 00 00 00 00 48 8d 6b 18 48 b8 00 00 RSP: 0018:ffff888019d2fd60 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff888019d2fe90 RCX: ffffc90009c2d000 RDX: 1ffff11008b04992 RSI: ffff888019d2fe90 RDI: ffff888045824c90 RBP: ffff888045824c80 R08: 0000000000000000 R09: ffff8880445cf35f R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880445cf450 R13: ffff8880445cf000 R14: ffff8880445cf450 R15: ffff8880445cf000 FS: 00007f940a09d700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f422000 CR3: 000000001b508000 CR4: 0000000000350ee0 Call Trace: io_cqring_wait fs/io_uring.c:7056 [inline] __do_sys_io_uring_enter+0xdf1/0x1920 fs/io_uring.c:9171 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f940cb27b19 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:00007f940a09d188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007f940cc3af60 RCX: 00007f940cb27b19 RDX: 0000000000009b4e RSI: 000000000000690e RDI: 0000000000000004 RBP: 00007f940cb81f6d R08: 0000000020000340 R09: 0000000000000008 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc8b47c16f R14: 00007f940a09d300 R15: 0000000000022000 ---------------- 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 ea c5 44 fd callq 0xfd44c603 19: 48 89 ef mov %rbp,%rdi 1c: e8 c2 7f 45 fd callq 0xfd457fe3 21: f6 c7 02 test $0x2,%bh 24: 75 10 jne 0x36 26: 53 push %rbx 27: 9d popfq * 28: 65 ff 0d 44 3d 20 7c decl %gs:0x7c203d44(%rip) # 0x7c203d73 <-- trapping instruction 2f: 5b pop %rbx 30: 5d pop %rbp 31: e9 fd 0d 3e 00 jmpq 0x3e0e33 36: e8 d8 51 64 fd callq 0xfd645213 3b: eb e9 jmp 0x26 3d: 66 data16