------------[ cut here ]------------
do not call blocking ops when !TASK_RUNNING; state=2 set at [<ffffffff819fc8cd>] prepare_to_wait_event+0x3dd/0x480
WARNING: kernel/sched/core.c:9124 at __might_sleep+0x92/0xf0, CPU#1: syz.5.357/7818
Modules linked in:
CPU: 1 UID: 0 PID: 7818 Comm: syz.5.357 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__might_sleep+0xac/0xf0
Code: 00 00 48 89 3c 24 41 89 f5 4c 8d 35 9e 8b c4 0e 43 80 3c 3c 00 74 08 48 89 df e8 0f 8e 9e 00 48 8b 0b 4c 89 f7 89 ee 48 89 ca <67> 48 0f b9 3a 44 89 ee 48 8b 3c 24 eb b5 44 89 f1 80 e1 07 80 c1
RSP: 0018:ffffc9000406fae0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888114353630 RCX: ffffffff819fc8cd
RDX: ffffffff819fc8cd RSI: 0000000000000002 RDI: ffffffff905a9b10
RBP: 0000000000000002 R08: ffffc9000406fc27 R09: 0000000000000000
R10: ffffc9000406fc00 R11: fffff5200080df85 R12: 1ffff1102286a6c6
R13: 000000000000026f R14: ffffffff905a9b10 R15: dffffc0000000000
FS:  00007f001c08d6c0(0000) GS:ffff8882a8f55000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f001c08cff8 CR3: 00000001bdaa8000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __mutex_lock+0x118/0x1550
 futex_hash_allocate+0x7fb/0xf00
 __se_sys_prctl+0x78c/0x1910
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f001b19e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f001c08d028 EFLAGS: 00000246 ORIG_RAX: 000000000000009d
RAX: ffffffffffffffda RBX: 00007f001b425fa0 RCX: 00007f001b19e0d9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000004e
RBP: 00007f001b235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f001b426038 R14: 00007f001b425fa0 R15: 00007ffcf990c078
 </TASK>
