------------[ cut here ]------------
do not call blocking ops when !TASK_RUNNING; state=2 set at [<ffffffff819fc8cd>] prepare_to_wait_event+0x3dd/0x480 kernel/sched/wait.c:317
WARNING: kernel/sched/core.c:9124 at __might_sleep+0x92/0xf0 kernel/sched/core.c:9120, CPU#0: syz.0.0/5309
Modules linked in:
CPU: 0 UID: 0 PID: 5309 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__might_sleep+0xac/0xf0 kernel/sched/core.c:9120
Code: 00 00 48 89 3c 24 41 89 f5 4c 8d 35 9e f8 c4 0e 43 80 3c 3c 00 74 08 48 89 df e8 ff 37 a0 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:ffffc9000e0cfae0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88801afc62f0 RCX: ffffffff819fc8cd
RDX: ffffffff819fc8cd RSI: 0000000000000002 RDI: ffffffff905b0810
RBP: 0000000000000002 R08: ffffc9000e0cfc27 R09: 0000000000000000
R10: ffffc9000e0cfc00 R11: fffff52001c19f85 R12: 1ffff110035f8c5e
R13: 000000000000026f R14: ffffffff905b0810 R15: dffffc0000000000
FS:  00007f6de49406c0(0000) GS:ffff88808c53e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 000000001fb33000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __mutex_lock_common kernel/locking/mutex.c:623 [inline]
 __mutex_lock+0x118/0x1550 kernel/locking/mutex.c:821
 class_mutex_constructor include/linux/mutex.h:253 [inline]
 futex_pivot_pending kernel/futex/core.c:1789 [inline]
 futex_hash_allocate+0x7fb/0xf00 kernel/futex/core.c:1872
 __do_sys_prctl kernel/sys.c:2885 [inline]
 __se_sys_prctl+0x78c/0x1910 kernel/sys.c:2534
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6de399e0d9
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:00007f6de493ffe8 EFLAGS: 00000246 ORIG_RAX: 000000000000009d
RAX: ffffffffffffffda RBX: 00007f6de3c25fa0 RCX: 00007f6de399e0d9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000004e
RBP: 00007f6de3a35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6de3c26038 R14: 00007f6de3c25fa0 R15: 00007fff75f95b28
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	48 89 3c 24          	mov    %rdi,(%rsp)
   6:	41 89 f5             	mov    %esi,%r13d
   9:	4c 8d 35 9e f8 c4 0e 	lea    0xec4f89e(%rip),%r14        # 0xec4f8ae
  10:	43 80 3c 3c 00       	cmpb   $0x0,(%r12,%r15,1)
  15:	74 08                	je     0x1f
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 ff 37 a0 00       	call   0xa0381e
  1f:	48 8b 0b             	mov    (%rbx),%rcx
  22:	4c 89 f7             	mov    %r14,%rdi
  25:	89 ee                	mov    %ebp,%esi
  27:	48 89 ca             	mov    %rcx,%rdx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	44 89 ee             	mov    %r13d,%esi
  32:	48 8b 3c 24          	mov    (%rsp),%rdi
  36:	eb b5                	jmp    0xffffffed
  38:	44 89 f1             	mov    %r14d,%ecx
  3b:	80 e1 07             	and    $0x7,%cl
  3e:	80                   	.byte 0x80
  3f:	c1                   	.byte 0xc1