watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.6:11544] Modules linked in: irq event stamp: 13668506 hardirqs last enabled at (13668505): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (13668505): [] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (13668506): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (13643940): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (13643935): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 11544 Comm: syz-executor.6 Not tainted 5.10.163 #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: 3d 00 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 9a c0 43 fd 48 89 ef e8 72 7a 44 fd f6 c7 02 75 10 53 9d <65> ff 0d b4 32 1f 7c 5b 5d e9 6d 03 3d 00 e8 f8 52 63 fd eb e9 66 RSP: 0018:ffff888034d67638 EFLAGS: 00000202 RAX: 0000000000d09099 RBX: 0000000000000202 RCX: 1ffffffff0cfcb8a RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e33c98 RBP: ffff8880093ba550 R08: 0000000000000001 R09: ffffffff86797737 R10: fffffbfff0cf2ee6 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000202 FS: 00007f1b83db4700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557235ccf050 CR3: 0000000046d24000 CR4: 0000000000350ee0 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] __wake_up_common_lock+0xde/0x140 kernel/sched/wait.c:125 io_cqring_ev_posted+0x163/0x370 io_uring/io_uring.c:1636 io_req_complete_post+0x347/0x780 io_uring/io_uring.c:1855 io_poll_task_func+0x1f1/0x2d0 io_uring/io_uring.c:5400 tctx_task_work+0x196/0x740 io_uring/io_uring.c:2196 task_work_run+0xe2/0x1a0 kernel/task_work.c:161 tracehook_notify_signal include/linux/tracehook.h:211 [inline] io_run_task_work io_uring/io_uring.c:2460 [inline] io_run_task_work io_uring/io_uring.c:2456 [inline] io_uring_try_cancel_requests+0x67d/0xb50 io_uring/io_uring.c:9556 io_uring_cancel_generic.cold+0x44a/0x44f io_uring/io_uring.c:9705 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x26b/0x26a0 kernel/exit.c:766 do_group_exit+0x125/0x310 kernel/exit.c:908 get_signal+0x4bc/0x2340 kernel/signal.c:2751 arch_do_signal_or_restart+0x2b7/0x1990 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:274 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f1b8683eb19 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:00007f1b83db4218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f1b86951f68 RCX: 00007f1b8683eb19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f1b86951f68 RBP: 00007f1b86951f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1b86951f6c R13: 00007ffcd629729f R14: 00007f1b83db4300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 11576 Comm: syz-executor.5 Not tainted 5.10.163 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__wake_up_common+0x1b0/0x4c0 kernel/sched/wait.c:86 Code: 5b 5d 41 5c 41 5d 41 5e 41 5f e9 db 5b fc 02 49 8d 54 24 18 48 89 d0 48 c1 e8 03 80 3c 28 00 0f 85 fc 01 00 00 49 8b 44 24 18 <4d> 89 e0 48 83 e8 18 48 39 14 24 74 c1 49 89 c4 e9 3c ff ff ff 48 RSP: 0018:ffff88803527f5f0 EFLAGS: 00000046 RAX: ffff8880540c4a30 RBX: 0000000000000007 RCX: ffffffff81eba233 RDX: ffff8880540c48f0 RSI: ffffffff81eba2dd RDI: 0000000000000005 RBP: dffffc0000000000 R08: ffff8880540c4798 R09: ffff88803527f688 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880540c48d8 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000008000001 FS: 00007fbb2f6fe700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557235cb6e5c CR3: 0000000050b32000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __wake_up_common_lock+0xd0/0x140 kernel/sched/wait.c:123 io_cqring_ev_posted+0x163/0x370 io_uring/io_uring.c:1636 io_req_complete_post+0x347/0x780 io_uring/io_uring.c:1855 io_poll_task_func+0x1f1/0x2d0 io_uring/io_uring.c:5400 tctx_task_work+0x196/0x740 io_uring/io_uring.c:2196 task_work_run+0xe2/0x1a0 kernel/task_work.c:161 tracehook_notify_signal include/linux/tracehook.h:211 [inline] io_run_task_work io_uring/io_uring.c:2460 [inline] io_run_task_work io_uring/io_uring.c:2456 [inline] io_uring_try_cancel_requests+0x67d/0xb50 io_uring/io_uring.c:9556 io_uring_cancel_generic.cold+0x44a/0x44f io_uring/io_uring.c:9705 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x26b/0x26a0 kernel/exit.c:766 do_group_exit+0x125/0x310 kernel/exit.c:908 get_signal+0x4bc/0x2340 kernel/signal.c:2751 arch_do_signal_or_restart+0x2b7/0x1990 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x38/0x230 kernel/entry/common.c:274 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fbb32188b19 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:00007fbb2f6fe188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 00000000000076d3 RBX: 00007fbb3229bf60 RCX: 00007fbb32188b19 RDX: 0000000000000000 RSI: 00000000000076d3 RDI: 0000000000000005 RBP: 00007fbb321e2f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe8be577ef R14: 00007fbb2f6fe300 R15: 0000000000022000 hpet: Lost 4 RTC interrupts ---------------- Code disassembly (best guess): 0: 3d 00 0f 1f 00 cmp $0x1f0f00,%eax 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 c0 43 fd callq 0xfd43c0b5 1b: 48 89 ef mov %rbp,%rdi 1e: e8 72 7a 44 fd callq 0xfd447a95 23: f6 c7 02 test $0x2,%bh 26: 75 10 jne 0x38 28: 53 push %rbx 29: 9d popfq * 2a: 65 ff 0d b4 32 1f 7c decl %gs:0x7c1f32b4(%rip) # 0x7c1f32e5 <-- trapping instruction 31: 5b pop %rbx 32: 5d pop %rbp 33: e9 6d 03 3d 00 jmpq 0x3d03a5 38: e8 f8 52 63 fd callq 0xfd635335 3d: eb e9 jmp 0x28 3f: 66 data16