watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:32302] Modules linked in: watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.3:32274] irq event stamp: 4454437 Modules linked in: hardirqs last enabled at (4454436): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (4454436): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 irq event stamp: 4420129 hardirqs last disabled at (4454437): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1424): [] rcu_read_unlock_bh include/linux/rcupdate.h:717 [inline] softirqs last enabled at (1424): [] __dev_queue_xmit+0x1276/0x2a80 net/core/dev.c:3865 hardirqs last enabled at (4420128): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (4420128): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 softirqs last disabled at (1477): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (1477): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 CPU: 0 PID: 32302 Comm: syz-executor.4 Not tainted 4.19.207-syzkaller #0 hardirqs last disabled at (4420129): [] trace_hardirqs_off_thunk+0x1a/0x1c Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x56/0x80 kernel/locking/spinlock.c:192 softirqs last enabled at (2852): [] rcu_read_unlock_bh include/linux/rcupdate.h:717 [inline] softirqs last enabled at (2852): [] __dev_queue_xmit+0x1276/0x2a80 net/core/dev.c:3865 Code: 12 88 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 32 48 83 3d db 83 87 01 00 74 1f fb 66 0f 1f 44 00 00 01 00 00 00 e8 d0 9e b7 fa 65 8b 05 39 70 77 79 85 c0 74 05 5b softirqs last disabled at (2911): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2911): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 RSP: 0018:ffff8881f6807df0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 CPU: 1 PID: 32274 Comm: syz-executor.3 Not tainted 4.19.207-syzkaller #0 RAX: dffffc0000000000 RBX: ffff8881f6823a40 RCX: 0000000000000000 RDX: 1ffffffff1024033 RSI: 0000000000000000 RDI: ffffffff88120198 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RBP: ffff8881f6807df8 R08: ffffed103ed04749 R09: 0000000000000000 RIP: 0010:lock_acquire+0x1fb/0x3d0 kernel/locking/lockdep.c:3912 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881f6807e70 Code: ea 03 80 3c 02 00 0f 85 aa 01 00 00 48 83 3d 63 67 c6 06 00 0f 84 31 01 00 00 48 8b 7d c8 57 9d 0f 1f 44 00 00 48 8d 65 d8 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 65 8b 05 e4 e6 b5 7e 83 f8 3f 0f 87 R13: dffffc0000000000 R14: ffffffff852a4ee0 R15: ffff8881f6823a40 RSP: 0018:ffff8881f6907cf8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 FS: 00007f7f4cc3c700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 RAX: dffffc0000000000 RBX: ffff8881b9408330 RCX: 1ffff1103c6925e5 RDX: 1ffffffff1024031 RSI: 0000000000000000 RDI: 0000000000000282 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcb7e59c60 CR3: 00000001bddb1005 CR4: 00000000001606f0 RBP: ffff8881f6907d18 R08: 0000000000007a16 R09: 0000000000000000 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 R10: ffff8881e3492f08 R11: 0000000000000001 R12: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 Call Trace: FS: 00007fd2f13c2700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 expire_timers kernel/time/timer.c:1374 [inline] __run_timers kernel/time/timer.c:1696 [inline] __run_timers kernel/time/timer.c:1664 [inline] run_timer_softirq+0xb58/0x1180 kernel/time/timer.c:1709 CR2: 00007ffcb7e59c60 CR3: 00000001bc034001 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_softirq+0x25f/0x919 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 call_timer_fn+0x11a/0x510 kernel/time/timer.c:1335 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13e/0x540 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:do_futex+0x851/0x1530 kernel/futex.c:3891 Code: 48 8b b5 e8 fd ff ff 49 8b 7f 80 48 83 c6 10 e8 45 7f ff ff e9 bb fc ff ff 31 c9 89 de 4c 89 ef e8 d4 d0 ff ff e9 3d fd ff ff <41> c7 87 c0 fe ff ff ff ff ff ff b9 ff ff ff ff e9 37 fd ff ff 41 RSP: 0018:ffff8881ab35fb70 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000001 expire_timers kernel/time/timer.c:1375 [inline] __run_timers kernel/time/timer.c:1696 [inline] __run_timers kernel/time/timer.c:1664 [inline] run_timer_softirq+0xb63/0x1180 kernel/time/timer.c:1709 RDX: 0000000000000000 RSI: 0000000000000081 RDI: 000000000052bf0c RBP: ffff8881ab35fe00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000004b240a R12: ffffffffffffffda R13: 000000000052bf0c R14: 0000000000000000 R15: ffff8881ab35fdd8 __do_softirq+0x25f/0x919 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13e/0x540 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xaf/0xd0 kernel/locking/spinlock.c:184 Code: 88 01 12 88 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 28 48 83 3d f0 80 87 01 00 74 15 48 89 df 57 9d <0f> 1f 44 00 00 eb ad e8 3f d0 75 fa eb bb 0f 0b 0f 0b e8 aa f7 05 RSP: 0018:ffff8881ad0ef938 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000000282 RCX: 0000000000000000 __do_sys_futex kernel/futex.c:3950 [inline] __se_sys_futex kernel/futex.c:3918 [inline] __x64_sys_futex+0x1cb/0x3a0 kernel/futex.c:3918 RDX: 1ffffffff1024031 RSI: 0000000000000001 RDI: 0000000000000282 RBP: ffff8881ad0ef948 R08: ffffed103cf06182 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881e7830c08 R13: ffff8881e7830440 R14: ffff8881f692c400 R15: 0000000000000001 try_to_wake_up+0xc2/0xf20 kernel/sched/core.c:2056 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 wake_up_process kernel/sched/core.c:2124 [inline] wake_up_q+0xa4/0x100 kernel/sched/core.c:442 entry_SYSCALL_64_after_hwframe+0x49/0xbe futex_wake+0x340/0x5a0 kernel/futex.c:1706 RIP: 0033:0x461209 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:00007f7f4cc3c218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 000000000052bf08 RCX: 0000000000461209 RDX: 00000000004b240a RSI: 0000000000000081 RDI: 000000000052bf0c do_futex+0x5aa/0x1530 kernel/futex.c:3894 RBP: 000000000052bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000246 R12: 000000000052bf0c R13: 00007ffc3acff8cf R14: 00007f7f4cc3c300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 7: fc ff df a: 48 89 fa mov %rdi,%rdx d: 48 c1 ea 03 shr $0x3,%rdx 11: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 15: 75 32 jne 0x49 17: 48 83 3d db 83 87 01 cmpq $0x0,0x18783db(%rip) # 0x18783fa 1e: 00 1f: 74 1f je 0x40 21: fb sti 22: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) * 28: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction 2d: e8 d0 9e b7 fa callq 0xfab79f02 32: 65 8b 05 39 70 77 79 mov %gs:0x79777039(%rip),%eax # 0x79777072 39: 85 c0 test %eax,%eax 3b: 74 05 je 0x42 3d: 5b pop %rbx