WARNING: CPU: 2 PID: 0 at kernel/workqueue.c:2255 __queue_work+0xd03/0x1160 kernel/workqueue.c:2254 Modules linked in: CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__queue_work+0xd03/0x1160 kernel/workqueue.c:2254 Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 4b 04 00 00 48 8b 75 18 4c 89 fa 48 c7 c7 a0 03 ac 8b e8 be 1e f7 ff 90 <0f> 0b 90 90 e9 2f f7 ff ff e8 ff 79 38 00 90 0f 0b 90 e9 b4 f5 ff RSP: 0018:ffffc90000648be8 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff817a4388 RDX: ffff88801e2a4880 RSI: ffffffff817a4395 RDI: 0000000000000001 RBP: ffff8880382b4970 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff920000c918f R13: 0000000000000101 R14: ffffffff81833490 R15: ffff88806561f178 FS: 0000000000000000(0000) GS:ffff8880d68b2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fed5b36c600 CR3: 0000000057bcb000 CR4: 0000000000352ef0 Call Trace: call_timer_fn+0x197/0x620 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1793 [inline] __run_timers+0x569/0x960 kernel/time/timer.c:2372 __run_timer_base kernel/time/timer.c:2384 [inline] __run_timer_base kernel/time/timer.c:2376 [inline] run_timer_base+0x114/0x190 kernel/time/timer.c:2393 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2403 handle_softirqs+0x219/0x8e0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:finish_task_switch.isra.0+0x22a/0xc10 kernel/sched/core.c:5225 Code: fb 09 00 00 44 8b 05 b9 89 22 0f 45 85 c0 0f 85 be 01 00 00 4c 89 e7 e8 a4 f6 ff ff e8 6f 69 3a 00 fb 65 48 8b 1d 5e c5 4d 12 <48> 8d bb 18 16 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 RSP: 0018:ffffc90000187bd8 EFLAGS: 00000202 RAX: 0000000000760c67 RBX: ffff88801e2a4880 RCX: ffffffff81c3831f RDX: 0000000000000000 RSI: ffffffff8de52c58 RDI: ffffffff8c163280 RBP: ffffc90000187c20 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff90ab7297 R11: 0000000000000000 R12: ffff88806a63a300 R13: ffff88801e29c880 R14: ffff88806a63a300 R15: ffff88806a63b170 context_switch kernel/sched/core.c:5360 [inline] __schedule+0x1198/0x5de0 kernel/sched/core.c:6961 schedule_idle+0x5c/0x90 kernel/sched/core.c:7084 do_idle+0x2b6/0x510 kernel/sched/idle.c:358 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:428 start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:315 common_startup_64+0x13e/0x148 ---------------- Code disassembly (best guess): 0: fb sti 1: 09 00 or %eax,(%rax) 3: 00 44 8b 05 add %al,0x5(%rbx,%rcx,4) 7: b9 89 22 0f 45 mov $0x450f2289,%ecx c: 85 c0 test %eax,%eax e: 0f 85 be 01 00 00 jne 0x1d2 14: 4c 89 e7 mov %r12,%rdi 17: e8 a4 f6 ff ff call 0xfffff6c0 1c: e8 6f 69 3a 00 call 0x3a6990 21: fb sti 22: 65 48 8b 1d 5e c5 4d mov %gs:0x124dc55e(%rip),%rbx # 0x124dc588 29: 12 * 2a: 48 8d bb 18 16 00 00 lea 0x1618(%rbx),%rdi <-- trapping instruction 31: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 38: fc ff df 3b: 48 89 fa mov %rdi,%rdx 3e: 48 rex.W 3f: c1 .byte 0xc1