------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [] do_wait+0x227/0xce0 kernel/exit.c:1503 WARNING: CPU: 0 PID: 3626 at kernel/sched/core.c:9656 __might_sleep+0x105/0x150 kernel/sched/core.c:9656 Modules linked in: CPU: 0 PID: 3626 Comm: syz-executor.1 Tainted: G W 5.17.0-syzkaller-12817-gcffb2b72d3ed #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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 cf 29 73 00 e9 26 ff ff ff 89 34 24 e8 d2 RSP: 0018:ffffc90000007d68 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff888074c31d00 RCX: 0000000000000000 RDX: ffff888074c31d00 RSI: ffffffff815fce18 RDI: fffff52000000f9f RBP: ffffffff8a2479c0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815f77ee R11: 0000000000000000 R12: 00000000000002fe R13: 0000000000000000 R14: ffffffff8a247dc0 R15: 0000000000000000 FS: 0000555555bf2400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e122000 CR3: 000000004597d000 CR4: 0000000000350ef0 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:__sanitizer_cov_trace_const_cmp4+0xc/0x70 kernel/kcov.c:286 Code: 00 00 00 48 89 7c 30 e8 48 89 4c 30 f0 4c 89 54 d8 20 48 89 10 5b c3 0f 1f 80 00 00 00 00 41 89 f8 bf 03 00 00 00 4c 8b 14 24 <89> f1 65 48 8b 34 25 00 70 02 00 e8 74 f9 ff ff 84 c0 74 4b 48 8b RSP: 0018:ffffc90003e0fb58 EFLAGS: 00000246 RAX: ffffc90003e0fd18 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1ffff920007c1fa3 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 0000000000000004 R08: 0000000000000004 R09: ffffffff8ba0a083 R10: ffffffff8146dff5 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888074c31d00 R14: 0000000000000004 R15: ffff8880282e9d00 eligible_pid kernel/exit.c:962 [inline] eligible_child kernel/exit.c:969 [inline] wait_consider_task+0x105/0x3c50 kernel/exit.c:1297 do_wait_thread kernel/exit.c:1400 [inline] do_wait+0x6ca/0xce0 kernel/exit.c:1517 kernel_wait4+0x14c/0x260 kernel/exit.c:1680 __do_sys_wait4+0x13f/0x150 kernel/exit.c:1708 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f406ce874e7 Code: 89 7c 24 10 48 89 4c 24 18 e8 35 50 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 65 50 02 00 8b 44 RSP: 002b:00007ffe31661a20 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000000097 RCX: 00007f406ce874e7 RDX: 0000000040000001 RSI: 00007ffe31661aac RDI: 00000000ffffffff RBP: 00007ffe31661aac R08: 0000000000000000 R09: 00007ffe31674080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 000000000002a14f R14: 0000000000000004 R15: 00007ffe31661b10 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 48 89 add %cl,-0x77(%rax) 5: 7c 30 jl 0x37 7: e8 48 89 4c 30 callq 0x304c8954 c: f0 4c 89 54 d8 20 lock mov %r10,0x20(%rax,%rbx,8) 12: 48 89 10 mov %rdx,(%rax) 15: 5b pop %rbx 16: c3 retq 17: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 1e: 41 89 f8 mov %edi,%r8d 21: bf 03 00 00 00 mov $0x3,%edi 26: 4c 8b 14 24 mov (%rsp),%r10 * 2a: 89 f1 mov %esi,%ecx <-- trapping instruction 2c: 65 48 8b 34 25 00 70 mov %gs:0x27000,%rsi 33: 02 00 35: e8 74 f9 ff ff callq 0xfffff9ae 3a: 84 c0 test %al,%al 3c: 74 4b je 0x89 3e: 48 rex.W 3f: 8b .byte 0x8b