general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]
CPU: 1 PID: 4754 Comm: syz.4.152 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:d_backing_inode include/linux/dcache.h:553 [inline]
RIP: 0010:security_inode_getattr+0x42/0x120 security/security.c:1346
Code: d7 fd 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 bc fb 1c fe 4d 8b 36 49 83 c6 68 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 f7 e8 9f fb 1c fe 4d 8b 36 49 83 c6 0c
RSP: 0018:ffffc900030af308 EFLAGS: 00010202
RAX: 000000000000000d RBX: ffffc900030af690 RCX: 0000000000080000
RDX: ffffc9000d621000 RSI: 0000000000006485 RDI: 0000000000006486
RBP: ffffc900030af898 R08: ffffc900030af69f R09: ffffc900030af690
R10: dffffc0000000000 R11: fffff52000615ed4 R12: dffffc0000000000
R13: ffffc900030af6a0 R14: 0000000000000068 R15: ffffc900030af690
FS:  00007f7e42a546c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3291bff8 CR3: 00000000239f4000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vfs_getattr+0x26/0x3a0 fs/stat.c:157
 ovl_copy_up_one fs/overlayfs/copy_up.c:965 [inline]
 ovl_copy_up_flags+0x44e/0x1eb0 fs/overlayfs/copy_up.c:1051
 ovl_maybe_copy_up+0x14f/0x180 fs/overlayfs/copy_up.c:1083
 ovl_open+0x9b/0x1f0 fs/overlayfs/file.c:149
 do_dentry_open+0x7ff/0xf80 fs/open.c:826
 do_open fs/namei.c:3616 [inline]
 path_openat+0x26f5/0x2fa0 fs/namei.c:3750
 do_filp_open+0x1e2/0x410 fs/namei.c:3777
 file_open_name+0x15f/0x1b0 fs/open.c:1200
 acct_on kernel/acct.c:216 [inline]
 __do_sys_acct kernel/acct.c:309 [inline]
 __se_sys_acct+0x10f/0x7b0 kernel/acct.c:296
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7e4481b629
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:00007f7e42a54028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a3
RAX: ffffffffffffffda RBX: 00007f7e44a95090 RCX: 00007f7e4481b629
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f7e448b1b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7e44a95128 R14: 00007f7e44a95090 R15: 00007fff2b8ddb08
 </TASK>
Modules linked in:
---[ end trace 395193302e616a2f ]---
RIP: 0010:d_backing_inode include/linux/dcache.h:553 [inline]
RIP: 0010:security_inode_getattr+0x42/0x120 security/security.c:1346
Code: d7 fd 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 bc fb 1c fe 4d 8b 36 49 83 c6 68 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 f7 e8 9f fb 1c fe 4d 8b 36 49 83 c6 0c
RSP: 0018:ffffc900030af308 EFLAGS: 00010202
RAX: 000000000000000d RBX: ffffc900030af690 RCX: 0000000000080000
RDX: ffffc9000d621000 RSI: 0000000000006485 RDI: 0000000000006486
RBP: ffffc900030af898 R08: ffffc900030af69f R09: ffffc900030af690
R10: dffffc0000000000 R11: fffff52000615ed4 R12: dffffc0000000000
R13: ffffc900030af6a0 R14: 0000000000000068 R15: ffffc900030af690
FS:  00007f7e42a546c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f67ce2e6158 CR3: 00000000239f4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	d7                   	xlat   %ds:(%rbx)
   1:	fd                   	std
   2:	4c 8d 73 08          	lea    0x8(%rbx),%r14
   6:	4c 89 f0             	mov    %r14,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  12:	74 08                	je     0x1c
  14:	4c 89 f7             	mov    %r14,%rdi
  17:	e8 bc fb 1c fe       	call   0xfe1cfbd8
  1c:	4d 8b 36             	mov    (%r14),%r14
  1f:	49 83 c6 68          	add    $0x68,%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 9f fb 1c fe       	call   0xfe1cfbd8
  39:	4d 8b 36             	mov    (%r14),%r14
  3c:	49 83 c6 0c          	add    $0xc,%r14