Oops: general protection fault, probably for non-canonical address 0xdffffc0103904b0f: 0000 [#1] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x000000081c825878-0x000000081c82587f]
CPU: 0 UID: 0 PID: 5783 Comm: syz-executor 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:__list_del_entry_valid_or_report+0xa6/0x190 lib/list_debug.c:65
Code: 4d 89 fc 49 c1 ec 03 43 80 3c 2c 00 74 08 4c 89 ff e8 8e 9a 77 fd 49 39 1f 0f 85 92 00 00 00 4d 8d 7e 08 4d 89 fc 49 c1 ec 03 <43> 80 3c 2c 00 74 08 4c 89 ff e8 6b 9a 77 fd 49 39 1f 0f 85 9e 00
RSP: 0000:ffffc90005a878c8 EFLAGS: 00010206
RAX: 1ffff11009eb38bb RBX: ffff88804f59c5d8 RCX: ffff888033c32480
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88804f59c5e0
RBP: 0000000000000001 R08: ffff88804f59c4cb R09: 1ffff11009eb3899
R10: dffffc0000000000 R11: ffffed1009eb389a R12: 0000000103904b0f
R13: dffffc0000000000 R14: 000000081c825870 R15: 000000081c825878
FS:  00005555709bf500(0000) GS:ffff88808ca5b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f666bb94000 CR3: 0000000041508000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __list_del_entry_valid include/linux/list.h:132 [inline]
 __list_del_entry include/linux/list.h:223 [inline]
 list_del_init include/linux/list.h:295 [inline]
 inode_cgwb_move_to_attached+0x294/0x580 fs/fs-writeback.c:323
 writeback_single_inode+0x671/0xdc0 fs/fs-writeback.c:1885
 write_inode_now+0x1c2/0x290 fs/fs-writeback.c:2953
 iput_final fs/inode.c:1956 [inline]
 iput+0x8c1/0xe80 fs/inode.c:2015
 jfs_umount+0x199/0x3c0 fs/jfs/jfs_umount.c:65
 jfs_put_super+0x8c/0x190 fs/jfs/super.c:194
 generic_shutdown_super+0x13d/0x2d0 fs/super.c:646
 kill_block_super+0x44/0x90 fs/super.c:1725
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f542699b2d7
Code: a2 c7 05 9c 42 20 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fffa1ebc508 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f5426a2bee3 RCX: 00007f542699b2d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffa1ebc5c0
RBP: 00007fffa1ebc5c0 R08: 00007fffa1ebd5c0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffa1ebd650
R13: 00007f5426a2bee3 R14: 000000000002a729 R15: 00007fffa1ebd690
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid_or_report+0xa6/0x190 lib/list_debug.c:65
Code: 4d 89 fc 49 c1 ec 03 43 80 3c 2c 00 74 08 4c 89 ff e8 8e 9a 77 fd 49 39 1f 0f 85 92 00 00 00 4d 8d 7e 08 4d 89 fc 49 c1 ec 03 <43> 80 3c 2c 00 74 08 4c 89 ff e8 6b 9a 77 fd 49 39 1f 0f 85 9e 00
RSP: 0000:ffffc90005a878c8 EFLAGS: 00010206
RAX: 1ffff11009eb38bb RBX: ffff88804f59c5d8 RCX: ffff888033c32480
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88804f59c5e0
RBP: 0000000000000001 R08: ffff88804f59c4cb R09: 1ffff11009eb3899
R10: dffffc0000000000 R11: ffffed1009eb389a R12: 0000000103904b0f
R13: dffffc0000000000 R14: 000000081c825870 R15: 000000081c825878
FS:  00005555709bf500(0000) GS:ffff88808ca5b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f666bb94000 CR3: 0000000041508000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	4d 89 fc             	mov    %r15,%r12
   3:	49 c1 ec 03          	shr    $0x3,%r12
   7:	43 80 3c 2c 00       	cmpb   $0x0,(%r12,%r13,1)
   c:	74 08                	je     0x16
   e:	4c 89 ff             	mov    %r15,%rdi
  11:	e8 8e 9a 77 fd       	call   0xfd779aa4
  16:	49 39 1f             	cmp    %rbx,(%r15)
  19:	0f 85 92 00 00 00    	jne    0xb1
  1f:	4d 8d 7e 08          	lea    0x8(%r14),%r15
  23:	4d 89 fc             	mov    %r15,%r12
  26:	49 c1 ec 03          	shr    $0x3,%r12
* 2a:	43 80 3c 2c 00       	cmpb   $0x0,(%r12,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 6b 9a 77 fd       	call   0xfd779aa4
  39:	49 39 1f             	cmp    %rbx,(%r15)
  3c:	0f                   	.byte 0xf
  3d:	85                   	.byte 0x85
  3e:	9e                   	sahf