watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.7:37886] Modules linked in: irq event stamp: 60186774 hardirqs last enabled at (60186773): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (60186773): [] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (60186774): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1095 softirqs last enabled at (60144852): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (60144843): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 37886 Comm: syz-executor.7 Not tainted 5.10.148 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:196 Code: ff ff ff b8 08 00 00 00 4d 8b 17 49 8b 16 48 0f bd c8 48 63 c9 e9 5e ff ff ff 4c 01 d2 49 89 17 e9 cd fd ff ff 90 48 8b 34 24 <65> 48 8b 14 25 80 6f 02 00 65 8b 05 ac 45 c2 7e a9 00 01 ff 00 74 RSP: 0018:ffff88804b997d60 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffff888047bd9000 RCX: ffffffff8185f693 RDX: 0000000000000000 RSI: ffffffff8185f69c RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888047bd935f R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff888047bd9040 FS: 00007feea9d30700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2d624000 CR3: 000000004bf3e000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: io_cqring_overflow_flush fs/io_uring.c:1729 [inline] io_cqring_overflow_flush+0xac/0x160 fs/io_uring.c:1721 io_cqring_wait fs/io_uring.c:7041 [inline] __do_sys_io_uring_enter+0x813/0x1910 fs/io_uring.c:9128 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7feeac7bab19 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:00007feea9d30188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007feeac8cdf60 RCX: 00007feeac7bab19 RDX: 000000000000e3ae RSI: 0000000000000003 RDI: 0000000000000004 RBP: 00007feeac814f6d R08: 00000000200001c0 R09: 0000000000000008 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcf461cb3f R14: 00007feea9d30300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 37884 Comm: syz-executor.0 Not tainted 5.10.148 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_pc+0x45/0x60 kernel/kcov.c:202 Code: f6 c4 01 74 35 8b 82 64 13 00 00 85 c0 74 2b 8b 82 40 13 00 00 83 f8 02 75 20 48 8b 8a 48 13 00 00 8b 92 44 13 00 00 48 8b 01 <48> 83 c0 01 48 39 c2 76 07 48 89 34 c1 48 89 01 e9 26 16 e0 02 66 RSP: 0018:ffff888043bdfcd8 EFLAGS: 00000046 RAX: 000000000003ffff RBX: 0000000000000000 RCX: ffffc90003421000 RDX: 0000000000040000 RSI: ffffffff814673bd RDI: 0000000000000005 RBP: ffffffff83e1bca8 R08: 0000000000000000 R09: ffff888047bdf453 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888047bdf450 R13: 1ffff1100877bfa5 R14: 0000000000000202 R15: ffff888043bdfea8 FS: 00007fd4899a3700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000047c94000 CR4: 0000000000350ee0 Call Trace: arch_static_branch arch/x86/include/asm/jump_label.h:25 [inline] static_key_false include/linux/jump_label.h:200 [inline] trace_irq_enable_rcuidle include/trace/events/preemptirq.h:40 [inline] trace_hardirqs_on+0x7d/0x180 kernel/trace/trace_preemptirq.c:44 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x38/0x40 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:7042 [inline] __do_sys_io_uring_enter+0x825/0x1910 fs/io_uring.c:9128 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7fd48c42db19 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:00007fd4899a3188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fd48c540f60 RCX: 00007fd48c42db19 RDX: 000000000000e3ae RSI: 0000000000000003 RDI: 0000000000000004 RBP: 00007fd48c487f6d R08: 00000000200001c0 R09: 0000000000000008 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe8486f6cf R14: 00007fd4899a3300 R15: 0000000000022000 hpet: Lost 2 RTC interrupts hpet: Lost 2 RTC interrupts ---------------- Code disassembly (best guess), 3 bytes skipped: 0: b8 08 00 00 00 mov $0x8,%eax 5: 4d 8b 17 mov (%r15),%r10 8: 49 8b 16 mov (%r14),%rdx b: 48 0f bd c8 bsr %rax,%rcx f: 48 63 c9 movslq %ecx,%rcx 12: e9 5e ff ff ff jmpq 0xffffff75 17: 4c 01 d2 add %r10,%rdx 1a: 49 89 17 mov %rdx,(%r15) 1d: e9 cd fd ff ff jmpq 0xfffffdef 22: 90 nop 23: 48 8b 34 24 mov (%rsp),%rsi * 27: 65 48 8b 14 25 80 6f mov %gs:0x26f80,%rdx <-- trapping instruction 2e: 02 00 30: 65 8b 05 ac 45 c2 7e mov %gs:0x7ec245ac(%rip),%eax # 0x7ec245e3 37: a9 00 01 ff 00 test $0xff0100,%eax 3c: 74 .byte 0x74