Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 00[  534.082511][T10239] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 10239 Comm: syz.5.425 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:jfs_statfs+0x163/0x560 fs/jfs/super.c:128
Code: ed 48 c1 ed 03 49 be 00 00 00 00 00 fc ff df 42 80 7c 35 00 00 74 08 4c 89 ef e8 88 24 d7 fe 4d 8b 65 00 4c 89 e0 48 c1 e8 03 <42> 80 3c 30 00 74 08 4c 89 e7 e8 6e 24 d7 fe 4d 8b 34 24 4c 8d 63
RSP: 0018:ffffc9000cf4f690 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffc9000cf4fa90 RCX: 0000000000080000
RDX: ffffc9001ea1b000 RSI: 0000000000000c87 RDI: 0000000000000c88
RBP: 1ffff1100a621894 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000cf4f600 R11: ffffffff835766d0 R12: 0000000000000000
R13: ffff88805310c4a0 R14: dffffc0000000000 R15: ffff888061a38000
FS:  00007f741c46c6c0(0000) GS:ffff888126111000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe7b2c5000 CR3: 00000000636a0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 statfs_by_dentry fs/statfs.c:66 [inline]
 vfs_statfs+0x147/0x2d0 fs/statfs.c:90
 ovl_check_namelen fs/overlayfs/super.c:401 [inline]
 ovl_lower_dir fs/overlayfs/super.c:417 [inline]
 ovl_get_lowerstack fs/overlayfs/super.c:1197 [inline]
 ovl_fill_super_creds fs/overlayfs/super.c:1459 [inline]
 ovl_fill_super+0xb79/0x5d40 fs/overlayfs/super.c:1560
 vfs_get_super fs/super.c:1267 [inline]
 get_tree_nodev+0xbb/0x150 fs/super.c:1286
 vfs_get_tree+0x92/0x2a0 fs/super.c:1694
 fc_mount fs/namespace.c:1198 [inline]
 do_new_mount_fc fs/namespace.c:3765 [inline]
 do_new_mount+0x319/0xdc0 fs/namespace.c:3841
 do_mount fs/namespace.c:4174 [inline]
 __do_sys_mount fs/namespace.c:4390 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4367
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f741eacce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f741c46c028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f741ed46360 RCX: 00007f741eacce59
RDX: 0000200000000180 RSI: 0000200000000140 RDI: 0000000000000000
RBP: 00007f741eb62e6f R08: 0000200000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f741ed463f8 R14: 00007f741ed46360 R15: 00007ffe21777af8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:jfs_statfs+0x163/0x560 fs/jfs/super.c:128
Code: ed 48 c1 ed 03 49 be 00 00 00 00 00 fc ff df 42 80 7c 35 00 00 74 08 4c 89 ef e8 88 24 d7 fe 4d 8b 65 00 4c 89 e0 48 c1 e8 03 <42> 80 3c 30 00 74 08 4c 89 e7 e8 6e 24 d7 fe 4d 8b 34 24 4c 8d 63
RSP: 0018:ffffc9000cf4f690 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffc9000cf4fa90 RCX: 0000000000080000
RDX: ffffc9001ea1b000 RSI: 0000000000000c87 RDI: 0000000000000c88
RBP: 1ffff1100a621894 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc9000cf4f600 R11: ffffffff835766d0 R12: 0000000000000000
R13: ffff88805310c4a0 R14: dffffc0000000000 R15: ffff888061a38000
FS:  00007f741c46c6c0(0000) GS:ffff888126111000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe7b2c5000 CR3: 00000000636a0000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	ed                   	in     (%dx),%eax
   1:	48 c1 ed 03          	shr    $0x3,%rbp
   5:	49 be 00 00 00 00 00 	movabs $0xdffffc0000000000,%r14
   c:	fc ff df
   f:	42 80 7c 35 00 00    	cmpb   $0x0,0x0(%rbp,%r14,1)
  15:	74 08                	je     0x1f
  17:	4c 89 ef             	mov    %r13,%rdi
  1a:	e8 88 24 d7 fe       	call   0xfed724a7
  1f:	4d 8b 65 00          	mov    0x0(%r13),%r12
  23:	4c 89 e0             	mov    %r12,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 e7             	mov    %r12,%rdi
  34:	e8 6e 24 d7 fe       	call   0xfed724a7
  39:	4d 8b 34 24          	mov    (%r12),%r14
  3d:	4c                   	rex.WR
  3e:	8d                   	.byte 0x8d
  3f:	63                   	.byte 0x63