SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=18320 comm=syz.0.4391
incfs_lookup_dentry err:-40
general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 PID: 18320 Comm: syz.0.4391 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:d_backing_inode include/linux/dcache.h:552 [inline]
RIP: 0010:security_inode_getattr+0x47/0x140 security/security.c:1359
Code: 3c ff 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 57 65 80 ff 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 3a 65 80 ff 4d 8b 36 49 83 c6 0c
RSP: 0018:ffffc90000ddf6a0 EFLAGS: 00010206
RAX: 0000000000000006 RBX: ffffc90000ddf7a0 RCX: 0000000000080000
RDX: ffffc900066fe000 RSI: 0000000000000167 RDI: 0000000000000168
RBP: ffffc90000ddf6c8 R08: dffffc0000000000 R09: ffffc90000ddf8a0
R10: 0000000000000000 R11: 0000000000000008 R12: ffffc90000ddf7a0
R13: dffffc0000000000 R14: 0000000000000030 R15: ffffc90000ddfa60
FS:  00007f21c48886c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000012aa7d000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vfs_getattr+0x29/0x310 fs/stat.c:158
 ovl_getattr+0x359/0xe80 fs/overlayfs/inode.c:246
 vfs_getattr_nosec fs/stat.c:124 [inline]
 vfs_getattr+0x288/0x310 fs/stat.c:161
 incfs_getattr+0x271/0x350 fs/incfs/vfs.c:1726
 vfs_getattr_nosec fs/stat.c:124 [inline]
 vfs_getattr fs/stat.c:161 [inline]
 vfs_statx+0x391/0x660 fs/stat.c:233
 vfs_fstatat fs/stat.c:267 [inline]
 vfs_stat include/linux/fs.h:3440 [inline]
 __do_sys_newstat fs/stat.c:410 [inline]
 __se_sys_newstat+0xd8/0x350 fs/stat.c:406
 __x64_sys_newstat+0x5b/0x70 fs/stat.c:406
 x64_sys_call+0x411/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:5
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f21c398ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f21c4888038 EFLAGS: 00000246 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 00007f21c3bb5fa0 RCX: 00007f21c398ebe9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000200000000200
RBP: 00007f21c3a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f21c3bb6038 R14: 00007f21c3bb5fa0 R15: 00007ffebca936b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:d_backing_inode include/linux/dcache.h:552 [inline]
RIP: 0010:security_inode_getattr+0x47/0x140 security/security.c:1359
Code: 3c ff 4c 8d 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 57 65 80 ff 4d 8b 36 49 83 c6 30 4c 89 f0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 f7 e8 3a 65 80 ff 4d 8b 36 49 83 c6 0c
RSP: 0018:ffffc90000ddf6a0 EFLAGS: 00010206
RAX: 0000000000000006 RBX: ffffc90000ddf7a0 RCX: 0000000000080000
RDX: ffffc900066fe000 RSI: 0000000000000167 RDI: 0000000000000168
RBP: ffffc90000ddf6c8 R08: dffffc0000000000 R09: ffffc90000ddf8a0
R10: 0000000000000000 R11: 0000000000000008 R12: ffffc90000ddf7a0
R13: dffffc0000000000 R14: 0000000000000030 R15: ffffc90000ddfa60
FS:  00007f21c48886c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffe8 CR3: 000000012aa7d000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	3c ff                	cmp    $0xff,%al
   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 28 00       	cmpb   $0x0,(%rax,%r13,1)
  12:	74 08                	je     0x1c
  14:	4c 89 f7             	mov    %r14,%rdi
  17:	e8 57 65 80 ff       	call   0xff806573
  1c:	4d 8b 36             	mov    (%r14),%r14
  1f:	49 83 c6 30          	add    $0x30,%r14
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 3a 65 80 ff       	call   0xff806573
  39:	4d 8b 36             	mov    (%r14),%r14
  3c:	49 83 c6 0c          	add    $0xc,%r14