------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=2 set at [] do_wait_for_common kernel/sched/completion.c:98 [inline] do not call blocking ops when !TASK_RUNNING; state=2 set at [] __wait_for_common kernel/sched/completion.c:121 [inline] do not call blocking ops when !TASK_RUNNING; state=2 set at [] wait_for_common kernel/sched/completion.c:132 [inline] do not call blocking ops when !TASK_RUNNING; state=2 set at [] wait_for_completion+0x272/0x5e0 kernel/sched/completion.c:153 WARNING: kernel/sched/core.c:9183 at __might_sleep+0x92/0xf0 kernel/sched/core.c:9179, CPU#0: kworker/0:2/1225 Modules linked in: CPU: 0 UID: 0 PID: 1225 Comm: kworker/0:2 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: kvm-irqfd-cleanup irqfd_shutdown RIP: 0010:__might_sleep+0xac/0xf0 kernel/sched/core.c:9179 Code: 00 00 48 89 3c 24 41 89 f5 4c 8d 35 ce a4 e6 0e 43 80 3c 3c 00 74 08 48 89 df e8 bf 45 a1 00 48 8b 0b 4c 89 f7 89 ee 48 89 ca <67> 48 0f b9 3a 44 89 ee 48 8b 3c 24 eb b5 44 89 f1 80 e1 07 80 c1 RSP: 0018:ffffc90000007c08 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880298137e8 RCX: ffffffff8be638b2 RDX: ffffffff8be638b2 RSI: 0000000000000002 RDI: ffffffff907d29a0 RBP: 0000000000000002 R08: 0000000000000100 R09: 1ffffffff20f456f R10: dffffc0000000000 R11: fffffbfff20f4570 R12: 1ffff110053026fd R13: 00000000000011d1 R14: ffffffff907d29a0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888124cd2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f7248c10 CR3: 000000007b376000 CR4: 00000000003526f0 Call Trace: __cancel_work_sync+0x6d/0x110 kernel/workqueue.c:4561 mmc_free_host+0x19/0x30 drivers/mmc/core/host.c:700 call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2374 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386 run_timer_base kernel/time/timer.c:2395 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405 handle_softirqs+0x226/0x860 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:220 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:229 Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 4a ab bb f5 48 89 df e8 02 23 bc f5 e8 ad 66 e8 f5 fb bf 01 00 00 00 22 32 ad f5 65 48 8b 05 9a 30 ad 07 48 85 c0 74 07 5b c3 cc cc RSP: 0018:ffffc90005867658 EFLAGS: 00000206 RAX: 000000000001cd27 RBX: ffff8880b863b240 RCX: 0000000000000001 RDX: 0000000000000006 RSI: ffffffff8e475f59 RDI: 0000000000000001 RBP: 1ffff110053023eb R08: ffffffff907a2b7f R09: 1ffffffff20f456f R10: dffffc0000000000 R11: fffffbfff20f4570 R12: ffff888029811f6c R13: dffffc0000000000 R14: ffffffff8be62670 R15: ffff888029811f58 sched_submit_work kernel/sched/core.c:7319 [inline] schedule+0xea/0x2b0 kernel/sched/core.c:7367 schedule_timeout+0xc0/0x2c0 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common kernel/sched/completion.c:121 [inline] wait_for_common kernel/sched/completion.c:132 [inline] wait_for_completion+0x2ca/0x5e0 kernel/sched/completion.c:153 __synchronize_srcu+0x23b/0x2f0 kernel/rcu/srcutree.c:1477 irqfd_shutdown+0xb9/0x1e0 virt/kvm/eventfd.c:131 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 89 3c 24 mov %rdi,(%rsp) 6: 41 89 f5 mov %esi,%r13d 9: 4c 8d 35 ce a4 e6 0e lea 0xee6a4ce(%rip),%r14 # 0xee6a4de 10: 43 80 3c 3c 00 cmpb $0x0,(%r12,%r15,1) 15: 74 08 je 0x1f 17: 48 89 df mov %rbx,%rdi 1a: e8 bf 45 a1 00 call 0xa145de 1f: 48 8b 0b mov (%rbx),%rcx 22: 4c 89 f7 mov %r14,%rdi 25: 89 ee mov %ebp,%esi 27: 48 89 ca mov %rcx,%rdx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 44 89 ee mov %r13d,%esi 32: 48 8b 3c 24 mov (%rsp),%rdi 36: eb b5 jmp 0xffffffed 38: 44 89 f1 mov %r14d,%ecx 3b: 80 e1 07 and $0x7,%cl 3e: 80 .byte 0x80 3f: c1 .byte 0xc1