------------[ cut here ]------------
do not call blocking ops when !TASK_RUNNING; state=2 set at [<ffffffff81e1d7dd>] prepare_to_wait_event+0x8d/0x720 kernel/sched/wait.c:317
WARNING: kernel/sched/core.c:9120 at __might_sleep+0x94/0xc0 kernel/sched/core.c:9120, CPU#1: syz.1.23/5933
Modules linked in:
CPU: 1 UID: 0 PID: 5933 Comm: syz.1.23 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+0x97/0xc0 kernel/sched/core.c:9120
Code: 8b 94 24 70 18 00 00 48 85 d2 75 14 48 83 c4 08 89 ee 48 89 df 31 d2 5b 5d 41 5c e9 33 fc ff ff 48 8d 3d ec 2e 50 0f 48 89 d1 <67> 48 0f b9 3a eb db e8 ad 27 a4 00 eb 9f 89 74 24 04 e8 d2 27 a4
RSP: 0018:ffffc90006cefb68 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: ffffffff8bcfc6a0 RCX: ffffffff81e1d7dd
RDX: ffffffff81e1d7dd RSI: 0000000000000002 RDI: ffffffff91256c00
RBP: 000000000000026f R08: ffffffff81fbd302 R09: 0000000000000000
R10: ffffc90006cefd20 R11: 0000000000000000 R12: ffff888022064a80
R13: 0000000000000000 R14: dffffc0000000000 R15: ffffffff8e80d220
FS:  0000000000000000(0000) GS:ffff888096ce7000(0063) knlGS:00000000f541db40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f724ea66 CR3: 000000006cc8d000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __mutex_lock_common kernel/locking/mutex.c:623 [inline]
 __mutex_lock+0x10e/0x1bd0 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+0xd22/0x1120 kernel/futex/core.c:1872
 futex_hash_prctl+0x1b8/0x390 kernel/futex/core.c:2027
 __do_sys_prctl+0x16dd/0x2270 kernel/sys.c:2885
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xe7/0x970 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf702efec
Code: Unable to access opcode bytes at 0xf702efc2.
RSP: 002b:00000000f541d50c EFLAGS: 00000292 ORIG_RAX: 00000000000000ac
RAX: ffffffffffffffda RBX: 000000000000004e RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	8b 94 24 70 18 00 00 	mov    0x1870(%rsp),%edx
   7:	48 85 d2             	test   %rdx,%rdx
   a:	75 14                	jne    0x20
   c:	48 83 c4 08          	add    $0x8,%rsp
  10:	89 ee                	mov    %ebp,%esi
  12:	48 89 df             	mov    %rbx,%rdi
  15:	31 d2                	xor    %edx,%edx
  17:	5b                   	pop    %rbx
  18:	5d                   	pop    %rbp
  19:	41 5c                	pop    %r12
  1b:	e9 33 fc ff ff       	jmp    0xfffffc53
  20:	48 8d 3d ec 2e 50 0f 	lea    0xf502eec(%rip),%rdi        # 0xf502f13
  27:	48 89 d1             	mov    %rdx,%rcx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	eb db                	jmp    0xc
  31:	e8 ad 27 a4 00       	call   0xa427e3
  36:	eb 9f                	jmp    0xffffffd7
  38:	89 74 24 04          	mov    %esi,0x4(%rsp)
  3c:	e8                   	.byte 0xe8
  3d:	d2 27                	shlb   %cl,(%rdi)
  3f:	a4                   	movsb  %ds:(%rsi),%es:(%rdi)