R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
------------[ cut here ]------------
!list_empty(&mtd->part.node)
WARNING: drivers/mtd/mtdpart.c:37 at release_mtd_partition+0x71/0x90 drivers/mtd/mtdpart.c:37, CPU#2: syz.3.1063/9859
Modules linked in:
CPU: 2 UID: 0 PID: 9859 Comm: syz.3.1063 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:release_mtd_partition+0x71/0x90 drivers/mtd/mtdpart.c:37
Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 1e 48 8b 7b 38 e8 7f 15 de fb 48 89 df 5b 5d e9 75 15 de fb e8 b0 d5 7e fb 90 <0f> 0b 90 eb c2 e8 85 2a ea fb eb db 48 89 ef e8 7b 2a ea fb eb a5
RSP: 0000:ffffc900047479c0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888050b5f000 RCX: ffffffff8b867f17
RDX: ffff88802907c900 RSI: ffffffff86892230 RDI: ffff888050b5f000
RBP: ffff888050b5f650 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88806b4ed1c0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88809735a000(0063) knlGS:00000000f53edb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f53cbff4 CR3: 000000004d4b7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 mtd_release+0xa0/0xd0 drivers/mtd/mtdcore.c:101
 device_release+0xa4/0x240 drivers/base/core.c:2565
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1f7/0x640 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3797
 add_mtd_device+0xbd7/0x17a0 drivers/mtd/mtdcore.c:802
 mtd_add_partition+0x30a/0x660 drivers/mtd/mtdpart.c:279
 mtdchar_blkpg_ioctl+0x207/0x250 drivers/mtd/mtdchar.c:562
 mtdchar_compat_ioctl+0x3d6/0x440 drivers/mtd/mtdchar.c:1322
 __do_compat_sys_ioctl fs/ioctl.c:695 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x2cf/0x360 fs/ioctl.c:638
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xe3/0x8c0 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: 0023:0xf6ffef6c
Code: d2 74 05 c1 e8 0c 89 02 8b 5d fc 31 c0 c9 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 58 b8 77 00 00 00 cd 80 0f 0b 8d b6 00 00 00 00 b8 ad
RSP: 002b:00000000f53ed50c EFLAGS: 00000292 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000001269
RDX: 0000000080000680 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:	d2 74 05 c1          	shlb   %cl,-0x3f(%rbp,%rax,1)
   4:	e8 0c 89 02 8b       	call   0x8b028915
   9:	5d                   	pop    %rbp
   a:	fc                   	cld
   b:	31 c0                	xor    %eax,%eax
   d:	c9                   	leave
   e:	c3                   	ret
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	0f 1f 00             	nopl   (%rax)
  21:	51                   	push   %rcx
  22:	52                   	push   %rdx
  23:	55                   	push   %rbp
  24:	89 e5                	mov    %esp,%ebp
  26:	0f 34                	sysenter
  28:	cd 80                	int    $0x80
* 2a:	5d                   	pop    %rbp <-- trapping instruction
  2b:	5a                   	pop    %rdx
  2c:	59                   	pop    %rcx
  2d:	c3                   	ret
  2e:	58                   	pop    %rax
  2f:	b8 77 00 00 00       	mov    $0x77,%eax
  34:	cd 80                	int    $0x80
  36:	0f 0b                	ud2
  38:	8d b6 00 00 00 00    	lea    0x0(%rsi),%esi
  3e:	b8                   	.byte 0xb8
  3f:	ad                   	lods   %ds:(%rsi),%eax