Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 5328 Comm: syz-executor Not tainted 6.10.0-rc7-syzkaller-00141-g43db1e03c086 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:list_add_tail include/linux/list.h:183 [inline]
RIP: 0010:list_lru_add+0x1b1/0x390 mm/list_lru.c:97
Code: 89 ef e8 72 93 1c 00 48 8b 45 00 48 8b 4c 24 30 48 8d 6c 08 40 4c 8d 6d 08 4d 89 ec 49 c1 ec 03 48 b8 00 00 00 00 00 fc ff df <41> 80 3c 04 00 74 08 4c 89 ef e8 40 93 1c 00 4c 8b 7d 08 4c 89 f7
RSP: 0018:ffffc9000308fb98 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 1ffff1100c51f037 RCX: 0000000000000000
RDX: 0000000000000003 RSI: ffffffff8bcaccc0 RDI: ffffffff8c202880
RBP: 0000000000000000 R08: ffffffff8fad94af R09: 1ffffffff1f5b295
R10: dffffc0000000000 R11: fffffbfff1f5b296 R12: 0000000000000001
R13: 0000000000000008 R14: ffff8880628f81b8 R15: 0000000000000000
FS:  000055556e100500(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe8413ae28 CR3: 0000000029508000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __inode_add_lru fs/inode.c:467 [inline]
 iput_final fs/inode.c:1718 [inline]
 iput+0x87a/0x930 fs/inode.c:1767
 __dentry_kill+0x20d/0x630 fs/dcache.c:607
 dput+0x19f/0x2b0 fs/dcache.c:849
 shrink_dcache_for_umount+0x7d/0x130 fs/dcache.c:1559
 generic_shutdown_super+0x6a/0x2d0 fs/super.c:620
 bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2052
 deactivate_locked_super+0xc6/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1267
 task_work_run+0x251/0x310 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x360 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa099b76f07
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 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 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe8413b5d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fa099b76f07
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe8413b690
RBP: 00007ffe8413b690 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe8413c750
R13: 00007fa099be3515 R14: 0000000000022886 R15: 0000000000021fc9
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:list_add_tail include/linux/list.h:183 [inline]
RIP: 0010:list_lru_add+0x1b1/0x390 mm/list_lru.c:97
Code: 89 ef e8 72 93 1c 00 48 8b 45 00 48 8b 4c 24 30 48 8d 6c 08 40 4c 8d 6d 08 4d 89 ec 49 c1 ec 03 48 b8 00 00 00 00 00 fc ff df <41> 80 3c 04 00 74 08 4c 89 ef e8 40 93 1c 00 4c 8b 7d 08 4c 89 f7
RSP: 0018:ffffc9000308fb98 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 1ffff1100c51f037 RCX: 0000000000000000
RDX: 0000000000000003 RSI: ffffffff8bcaccc0 RDI: ffffffff8c202880
RBP: 0000000000000000 R08: ffffffff8fad94af R09: 1ffffffff1f5b295
R10: dffffc0000000000 R11: fffffbfff1f5b296 R12: 0000000000000001
R13: 0000000000000008 R14: ffff8880628f81b8 R15: 0000000000000000
FS:  000055556e100500(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe8413ae28 CR3: 0000000029508000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	89 ef                	mov    %ebp,%edi
   2:	e8 72 93 1c 00       	call   0x1c9379
   7:	48 8b 45 00          	mov    0x0(%rbp),%rax
   b:	48 8b 4c 24 30       	mov    0x30(%rsp),%rcx
  10:	48 8d 6c 08 40       	lea    0x40(%rax,%rcx,1),%rbp
  15:	4c 8d 6d 08          	lea    0x8(%rbp),%r13
  19:	4d 89 ec             	mov    %r13,%r12
  1c:	49 c1 ec 03          	shr    $0x3,%r12
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	41 80 3c 04 00       	cmpb   $0x0,(%r12,%rax,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ef             	mov    %r13,%rdi
  34:	e8 40 93 1c 00       	call   0x1c9379
  39:	4c 8b 7d 08          	mov    0x8(%rbp),%r15
  3d:	4c 89 f7             	mov    %r14,%rdi