------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=402 set at [] need_more_worker kernel/workqueue.c:2364 [inline] do not call blocking ops when !TASK_RUNNING; state=402 set at [] worker_thread+0xd6/0x1080 kernel/workqueue.c:2404 WARNING: CPU: 0 PID: 8 at kernel/sched/core.c:9656 __might_sleep+0x105/0x150 kernel/sched/core.c:9656 Modules linked in: CPU: 0 PID: 8 Comm: kworker/u4:0 Tainted: G W 5.17.0-syzkaller-11407-gae085d7f9365 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: 0x0 (events_unbound) RIP: 0010:__might_sleep+0x105/0x150 kernel/sched/core.c:9656 Code: 70 02 00 48 8d bb f0 16 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 75 34 48 8b 93 f0 16 00 00 48 c7 c7 00 df cb 89 e8 96 47 c8 07 <0f> 0b e9 75 ff ff ff e8 9f 2a 73 00 e9 26 ff ff ff 89 34 24 e8 a2 RSP: 0018:ffffc90000007d68 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff888010e45700 RCX: 0000000000000000 RDX: ffff888010e45700 RSI: ffffffff815fce18 RDI: fffff52000000f9f RBP: ffffffff8a247980 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff815f77ee R11: 0000000000000000 R12: 00000000000002fe R13: 0000000000000000 R14: ffffffff8a247d80 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f6f36110 CR3: 000000000ba8e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: blk_release_queue+0x1f/0x320 block/blk-sysfs.c:766 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:753 blkg_free.part.0+0x112/0x1f0 block/blk-cgroup.c:86 blkg_free block/blk-cgroup.c:78 [inline] __blkg_release+0x105/0x160 block/blk-cgroup.c:102 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0x7b1/0x1880 kernel/rcu/tree.c:2786 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:wq_worker_sleeping+0x2/0x250 kernel/workqueue.c:893 Code: 2b 00 e8 c8 cc b2 ff eb ae 4c 89 e7 e8 07 cd 76 00 eb c6 e8 90 cc 76 00 e9 14 ff ff ff e8 96 cc 76 00 e9 44 ff ff ff 90 41 54 <55> 48 89 fd 53 e8 64 24 2b 00 48 89 ef e8 7c ee 00 00 4c 8d 60 68 RSP: 0018:ffffc900000d7e18 EFLAGS: 00000202 RAX: 0000000004208060 RBX: ffff888010e45700 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff817ee411 RDI: ffff888010e45700 RBP: ffff888010e45700 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff817ee3f8 R11: 0000000000000000 R12: ffff888010e4572c R13: 0000000000000000 R14: ffff888010db4a00 R15: ffff888010c69800 sched_submit_work kernel/sched/core.c:6422 [inline] schedule+0x151/0x1f0 kernel/sched/core.c:6451 worker_thread+0x15c/0x1080 kernel/workqueue.c:2457 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 ---------------- Code disassembly (best guess): 0: 2b 00 sub (%rax),%eax 2: e8 c8 cc b2 ff callq 0xffb2cccf 7: eb ae jmp 0xffffffb7 9: 4c 89 e7 mov %r12,%rdi c: e8 07 cd 76 00 callq 0x76cd18 11: eb c6 jmp 0xffffffd9 13: e8 90 cc 76 00 callq 0x76cca8 18: e9 14 ff ff ff jmpq 0xffffff31 1d: e8 96 cc 76 00 callq 0x76ccb8 22: e9 44 ff ff ff jmpq 0xffffff6b 27: 90 nop 28: 41 54 push %r12 * 2a: 55 push %rbp <-- trapping instruction 2b: 48 89 fd mov %rdi,%rbp 2e: 53 push %rbx 2f: e8 64 24 2b 00 callq 0x2b2498 34: 48 89 ef mov %rbp,%rdi 37: e8 7c ee 00 00 callq 0xeeb8 3c: 4c 8d 60 68 lea 0x68(%rax),%r12