: renamed from dummy0 (while UP)
------------[ cut here ]------------
do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffff85a68c7b>] hpet_read+0x21b/0x5a0 drivers/char/hpet.c:285
WARNING: kernel/sched/core.c:9120 at __might_sleep+0x94/0xc0 kernel/sched/core.c:9120, CPU#3: syz.6.2071/14890
Modules linked in:
CPU: 3 UID: 0 PID: 14890 Comm: syz.6.2071 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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 d7 50 0f 48 89 d1 <67> 48 0f b9 3a eb db e8 cd 1d a4 00 eb 9f 89 74 24 04 e8 f2 1d a4
RSP: 0018:ffffc9000d8cfba8 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: ffffffff8c52faa0 RCX: ffffffff85a68c7b
RDX: ffffffff85a68c7b RSI: 0000000000000001 RDI: ffffffff9125f4e0
RBP: 0000000000000131 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888029384a80
R13: 0000000000000000 R14: ffff888021c13340 R15: ffffed1005270c5e
FS:  0000000000000000(0000) GS:ffff888096ee3000(0063) knlGS:00000000f54adb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000080003000 CR3: 000000004bb61000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __might_fault+0x8b/0x140 mm/memory.c:7290
 hpet_read+0x48c/0x5a0 drivers/char/hpet.c:305
 vfs_read+0x1e4/0xb40 fs/read_write.c:572
 ksys_read+0x12a/0x250 fs/read_write.c:716
 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: 0023:0xf70befec
Code: Unable to access opcode bytes at 0xf70befc2.
RSP: 002b:00000000f54ad50c EFLAGS: 00000292 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000800031c0
RDX: 0000000000002020 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 d7 50 0f 	lea    0xf50d7ec(%rip),%rdi        # 0xf50d813
  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 cd 1d a4 00       	call   0xa41e03
  36:	eb 9f                	jmp    0xffffffd7
  38:	89 74 24 04          	mov    %esi,0x4(%rsp)
  3c:	e8                   	.byte 0xe8
  3d:	f2                   	repnz
  3e:	1d                   	.byte 0x1d
  3f:	a4                   	movsb  %ds:(%rsi),%es:(%rdi)