------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [] do_wait+0x227/0xce0 kernel/exit.c:1503 WARNING: CPU: 1 PID: 3695 at kernel/sched/core.c:9656 __might_sleep+0x105/0x150 kernel/sched/core.c:9656 Modules linked in: CPU: 1 PID: 3695 Comm: syz-executor.3 Not tainted 5.17.0-syzkaller-11138-gf022814633e1 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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 f1 cb 89 e8 9f 30 c9 07 <0f> 0b e9 75 ff ff ff e8 6f 49 73 00 e9 26 ff ff ff 89 34 24 e8 72 RSP: 0018:ffffc90000528d68 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88801ad78000 RCX: 0000000000000000 RDX: ffff88801ad78000 RSI: ffffffff816015a8 RDI: fffff520000a519f RBP: ffffffff8a248c40 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff815fbf7e R11: 0000000000000000 R12: 00000000000002fe R13: 0000000000000000 R14: ffffffff8a249040 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88802cb00000(0063) knlGS:0000000057131380 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7360000 CR3: 000000006aff2000 CR4: 0000000000150ee0 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:638 RIP: 0010:rcu_read_lock_held_common kernel/rcu/update.c:120 [inline] RIP: 0010:rcu_read_lock_sched_held+0x2/0x70 kernel/rcu/update.c:123 Code: 49 c1 ec 09 49 83 f4 01 41 83 e4 01 44 89 e0 41 5c c3 45 31 e4 44 89 e0 41 5c c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 54 <41> bc 01 00 00 00 e8 63 4b fb 07 85 c0 75 06 44 89 e0 41 5c c3 e8 RSP: 0018:ffffc90002b3fb88 EFLAGS: 00000283 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff815da7a1 RDX: fffffbfff1b6c7e3 RSI: 0000000000000008 RDI: ffffffff8db63f10 RBP: 1ffff92000567f75 R08: 0000000000000000 R09: ffffffff8db63f17 R10: fffffbfff1b6c7e2 R11: 0000000000000001 R12: ffffffff8ba0a098 R13: ffff88801ad78000 R14: 0000000000000000 R15: ffff88801ad78610 trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x522/0x720 kernel/locking/lockdep.c:5652 __raw_read_unlock include/linux/rwlock_api_smp.h:231 [inline] _raw_read_unlock+0x12/0x40 kernel/locking/spinlock.c:260 do_wait+0x4f8/0xce0 kernel/exit.c:1529 kernel_wait4+0x14c/0x260 kernel/exit.c:1680 __do_compat_sys_wait4+0x137/0x150 kernel/exit.c:1738 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f46549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000fff3ef60 EFLAGS: 00000282 ORIG_RAX: 0000000000000072 RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00000000fff3f030 RDX: 0000000040000001 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000bb8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 49 c1 ec 09 shr $0x9,%r12 4: 49 83 f4 01 xor $0x1,%r12 8: 41 83 e4 01 and $0x1,%r12d c: 44 89 e0 mov %r12d,%eax f: 41 5c pop %r12 11: c3 retq 12: 45 31 e4 xor %r12d,%r12d 15: 44 89 e0 mov %r12d,%eax 18: 41 5c pop %r12 1a: c3 retq 1b: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 22: 00 00 00 00 26: 66 90 xchg %ax,%ax 28: 41 54 push %r12 * 2a: 41 bc 01 00 00 00 mov $0x1,%r12d <-- trapping instruction 30: e8 63 4b fb 07 callq 0x7fb4b98 35: 85 c0 test %eax,%eax 37: 75 06 jne 0x3f 39: 44 89 e0 mov %r12d,%eax 3c: 41 5c pop %r12 3e: c3 retq 3f: e8 .byte 0xe8