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#3: syz.7.5825/25674
Modules linked in:
CPU: 3 UID: 0 PID: 25674 Comm: syz.7.5825 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 0f 05 eb fb 48 89 df 5b 5d e9 05 05 eb fb e8 90 82 8d fb 90 <0f> 0b 90 eb c2 e8 45 dd f6 fb eb db 48 89 ef e8 3b dd f6 fb eb a5
RSP: 0018:ffffc90003aff9c0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880248a5000 RCX: ffffffff8b6f2a27
RDX: ffff888022e54980 RSI: ffffffff8678cbd0 RDI: ffff8880248a5000
RBP: ffff8880248a5650 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88805391fb40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880976e2000(0063) knlGS:00000000f5426b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000003111fff8 CR3: 000000004dedf000 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+0x694/0x1750 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+0xde/0x660 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: 0023:0xf73fd579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 2e 8d b4 26 00 00 00 00 8d b4 26 00 00 00
RSP: 002b:00000000f542650c EFLAGS: 00000292 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000001269
RDX: 0000000080000180 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), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	2e 8d b4 26 00 00 00 	cs lea 0x0(%rsi,%riz,1),%esi
  37:	00
  38:	8d                   	.byte 0x8d
  39:	b4 26                	mov    $0x26,%ah
  3b:	00 00                	add    %al,(%rax)