------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=2 set at [] prepare_to_wait_event+0x40e/0x560 kernel/sched/wait.c:329 WARNING: CPU: 0 PID: 3726 at kernel/sched/core.c:9660 __might_sleep+0xb0/0xe0 kernel/sched/core.c:9656 Modules linked in: CPU: 0 PID: 3726 Comm: kworker/0:8 Tainted: G W 5.17.0-syzkaller-13430-g787af64d05cd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events pwq_unbound_release_workfn RIP: 0010:__might_sleep+0xb0/0xe0 kernel/sched/core.c:9656 Code: b0 0c 01 42 80 3c 23 00 74 08 48 89 ef e8 d8 d5 7a 00 48 8b 4d 00 48 c7 c7 80 b6 8e 8a 44 89 ee 48 89 ca 31 c0 e8 50 b2 f2 ff <0f> 0b eb b7 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 72 ff ff ff 48 89 RSP: 0018:ffffc90000007b38 EFLAGS: 00010246 RAX: 0fe7b53542bdd100 RBX: 1ffff110047c0a1e RCX: ffff888023e03a00 RDX: 0000000000000101 RSI: 0000000000000101 RDI: 0000000000000000 RBP: ffff888023e050f0 R08: ffffffff816b4962 R09: fffff52000000eb9 R10: fffff52000000eb9 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000002 R14: 00000000000002fe R15: ffffffff8c6b5bf2 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc0bfad6c20 CR3: 000000007a85c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: blk_release_queue+0x2e/0x2a0 block/blk-sysfs.c:766 kobject_cleanup+0x1c0/0x280 lib/kobject.c:705 blkg_free+0x2d0/0x320 block/blk-cgroup.c:86 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0xa85/0x1700 kernel/rcu/tree.c:2786 __do_softirq+0x392/0x7a3 kernel/softirq.c:558 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 Code: 21 3f fd ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 7e 15 3d f7 48 89 df e8 06 c7 3e f7 e8 c1 72 62 f7 fb bf 01 00 00 00 16 2a 31 f7 65 8b 05 b7 33 d8 75 85 c0 74 02 5b c3 e8 ec 1c d6 RSP: 0018:ffffc90003a9f768 EFLAGS: 00000286 RAX: 0fe7b53542bdd100 RBX: ffff8880b9a39400 RCX: ffff888023e03a00 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffc90003a9f9f0 R08: ffffffff818caeb0 R09: ffffed1017347281 R10: ffffed1017347281 R11: 0000000000000000 R12: ffff888023e03a00 R13: 1ffff92000753f6c R14: ffff888023e03a2c R15: dffffc0000000000 sched_submit_work kernel/sched/core.c:6422 [inline] schedule+0x6e/0x1b0 kernel/sched/core.c:6451 synchronize_rcu_expedited+0x5c1/0x740 kernel/rcu/tree_exp.h:857 synchronize_rcu+0xfe/0x1a0 kernel/rcu/tree.c:3789 lockdep_unregister_key+0x4fd/0x5d0 kernel/locking/lockdep.c:6334 wq_unregister_lockdep kernel/workqueue.c:3490 [inline] pwq_unbound_release_workfn+0x245/0x290 kernel/workqueue.c:3728 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x2a3/0x2d0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 ---------------- Code disassembly (best guess): 0: 21 3f and %edi,(%rdi) 2: fd std 3: ff 90 53 48 89 fb callq *-0x476b7ad(%rax) 9: 48 83 c7 18 add $0x18,%rdi d: 48 8b 74 24 08 mov 0x8(%rsp),%rsi 12: e8 7e 15 3d f7 callq 0xf73d1595 17: 48 89 df mov %rbx,%rdi 1a: e8 06 c7 3e f7 callq 0xf73ec725 1f: e8 c1 72 62 f7 callq 0xf76272e5 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 16 2a 31 f7 callq 0xf7312a45 <-- trapping instruction 2f: 65 8b 05 b7 33 d8 75 mov %gs:0x75d833b7(%rip),%eax # 0x75d833ed 36: 85 c0 test %eax,%eax 38: 74 02 je 0x3c 3a: 5b pop %rbx 3b: c3 retq 3c: e8 .byte 0xe8 3d: ec in (%dx),%al 3e: 1c d6 sbb $0xd6,%al