------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [] do_wait+0x227/0xce0 kernel/exit.c:1504 WARNING: CPU: 0 PID: 3762 at kernel/sched/core.c:9656 __might_sleep+0x105/0x150 kernel/sched/core.c:9656 Modules linked in: CPU: 0 PID: 3762 Comm: syz-executor.4 Tainted: G W 5.17.0-syzkaller-13430-g787af64d05cd #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 e0 c8 cb 89 e8 3a b3 c8 07 <0f> 0b e9 75 ff ff ff e8 1f 95 72 00 e9 26 ff ff ff 89 34 24 e8 22 RSP: 0018:ffffc90000007d68 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff888079cba2c0 RCX: 0000000000000000 RDX: ffff888079cba2c0 RSI: ffffffff815efad8 RDI: fffff52000000f9f RBP: ffffffff8a23f2c0 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff815ea4ae R11: 0000000000000000 R12: 00000000000002fe R13: 0000000000000000 R14: ffffffff8a23f6c0 R15: 0000000000000000 FS: 000055555683b400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0023596000 CR3: 00000000162fe000 CR4: 00000000003526f0 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:do_raw_read_unlock+0x44/0x70 kernel/locking/spinlock_debug.c:181 Code: b6 04 02 84 c0 74 04 3c 03 7e 3b 81 7b 08 ed 1e af de 75 18 be 04 00 00 00 48 89 df e8 a5 d0 65 00 b8 00 fe ff ff f0 0f c1 03 <5b> c3 e8 e5 01 8c 02 85 c0 74 df 48 c7 c6 c0 94 cc 89 48 89 df e8 RSP: 0018:ffffc90003cdfc70 EFLAGS: 00000247 RAX: 0000000000000200 RBX: ffffffff8ba0a080 RCX: ffffffff815d0f8b RDX: fffffbfff1741411 RSI: 0000000000000004 RDI: ffffffff8ba0a080 RBP: ffffffff8ba0a080 R08: 0000000000000001 R09: ffffffff8ba0a083 R10: fffffbfff1741410 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888079cba2c0 R14: 0000000000000000 R15: ffff888079cba8d0 __raw_read_unlock include/linux/rwlock_api_smp.h:232 [inline] _raw_read_unlock+0x1a/0x40 kernel/locking/spinlock.c:260 do_wait+0x4f8/0xce0 kernel/exit.c:1530 kernel_wait4+0x14c/0x260 kernel/exit.c:1681 __do_sys_wait4+0x13f/0x150 kernel/exit.c:1709 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: 0033:0x7ffb768874e7 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:00007fff2326d100 EFLAGS: 00000293 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 00000000000004fd RCX: 00007ffb768874e7 RDX: 0000000040000001 RSI: 00007fff2326d18c RDI: 00000000ffffffff RBP: 00007fff2326d18c R08: 0000000000000000 R09: 00007fff23397080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032 R13: 000000000005576e R14: 0000000000000004 R15: 00007fff2326d1f0 ---------------- Code disassembly (best guess): 0: b6 04 mov $0x4,%dh 2: 02 84 c0 74 04 3c 03 add 0x33c0474(%rax,%rax,8),%al 9: 7e 3b jle 0x46 b: 81 7b 08 ed 1e af de cmpl $0xdeaf1eed,0x8(%rbx) 12: 75 18 jne 0x2c 14: be 04 00 00 00 mov $0x4,%esi 19: 48 89 df mov %rbx,%rdi 1c: e8 a5 d0 65 00 callq 0x65d0c6 21: b8 00 fe ff ff mov $0xfffffe00,%eax 26: f0 0f c1 03 lock xadd %eax,(%rbx) * 2a: 5b pop %rbx <-- trapping instruction 2b: c3 retq 2c: e8 e5 01 8c 02 callq 0x28c0216 31: 85 c0 test %eax,%eax 33: 74 df je 0x14 35: 48 c7 c6 c0 94 cc 89 mov $0xffffffff89cc94c0,%rsi 3c: 48 89 df mov %rbx,%rdi 3f: e8 .byte 0xe8