gfs2: fsid=syz:syz.0:  H: s:SH f:H e:0 p:5453 [syz-executor.0] __gfs2_lookup+0xa4/0x270 fs/gfs2/inode.c:894
general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 0 PID: 5481 Comm: syz-executor.0 Not tainted 6.6.0-rc4-syzkaller-gce36c8b14987 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1457 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2259 [inline]
RIP: 0010:gfs2_dump_glock+0xf05/0x1ba0 fs/gfs2/glock.c:2375
Code: c6 05 59 ad c7 0a 01 48 c7 c7 40 af 4d 8b be ef 02 00 00 48 c7 c2 80 af 4d 8b e8 e6 f5 af fd 4d 8d 75 20 4d 89 f7 49 c1 ef 03 <43> 0f b6 04 27 84 c0 0f 85 b6 06 00 00 41 0f b7 1e 89 de 81 e6 00
RSP: 0018:ffffc90004faf160 EFLAGS: 00010202
RAX: ffffffff83bdb9b2 RBX: 0000000000000001 RCX: ffff88801a2e1dc0
RDX: 0000000000000000 RSI: ffffffff8b599c80 RDI: ffffffff8b599c40
RBP: ffffc90004faf450 R08: ffffffff83bdb99b R09: 1ffffffff20df670
R10: dffffc0000000000 R11: fffffbfff20df671 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000021 R15: 0000000000000004
FS:  00007f054310f6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcc64568378 CR3: 000000007dbef000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 gfs2_consist_inode_i+0xf5/0x110 fs/gfs2/util.c:456
 gfs2_dirent_scan+0x512/0x640 fs/gfs2/dir.c:602
 gfs2_dirent_search+0x30e/0x8c0 fs/gfs2/dir.c:850
 gfs2_dir_search+0xb2/0x2f0 fs/gfs2/dir.c:1650
 gfs2_lookupi+0x460/0x5d0 fs/gfs2/inode.c:338
 __gfs2_lookup+0xa4/0x270 fs/gfs2/inode.c:894
 gfs2_atomic_open+0x9e/0x230 fs/gfs2/inode.c:1295
 atomic_open fs/namei.c:3358 [inline]
 lookup_open fs/namei.c:3466 [inline]
 open_last_lookups fs/namei.c:3563 [inline]
 path_openat+0x1044/0x3180 fs/namei.c:3793
 do_filp_open+0x234/0x490 fs/namei.c:3823
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422
 do_sys_open fs/open.c:1437 [inline]
 __do_sys_openat fs/open.c:1453 [inline]
 __se_sys_openat fs/open.c:1448 [inline]
 __x64_sys_openat+0x247/0x290 fs/open.c:1448
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f054247cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f054310f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f054259c050 RCX: 00007f054247cae9
RDX: 0000000000000300 RSI: 0000000020000540 RDI: ffffffffffffff9c
RBP: 00007f05424c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f054259c050 R15: 00007ffd4e76c138
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1457 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2259 [inline]
RIP: 0010:gfs2_dump_glock+0xf05/0x1ba0 fs/gfs2/glock.c:2375
Code: c6 05 59 ad c7 0a 01 48 c7 c7 40 af 4d 8b be ef 02 00 00 48 c7 c2 80 af 4d 8b e8 e6 f5 af fd 4d 8d 75 20 4d 89 f7 49 c1 ef 03 <43> 0f b6 04 27 84 c0 0f 85 b6 06 00 00 41 0f b7 1e 89 de 81 e6 00
RSP: 0018:ffffc90004faf160 EFLAGS: 00010202
RAX: ffffffff83bdb9b2 RBX: 0000000000000001 RCX: ffff88801a2e1dc0
RDX: 0000000000000000 RSI: ffffffff8b599c80 RDI: ffffffff8b599c40
RBP: ffffc90004faf450 R08: ffffffff83bdb99b R09: 1ffffffff20df670
R10: dffffc0000000000 R11: fffffbfff20df671 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000021 R15: 0000000000000004
FS:  00007f054310f6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcc64568378 CR3: 000000007dbef000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c6 05 59 ad c7 0a 01 	movb   $0x1,0xac7ad59(%rip)        # 0xac7ad60
   7:	48 c7 c7 40 af 4d 8b 	mov    $0xffffffff8b4daf40,%rdi
   e:	be ef 02 00 00       	mov    $0x2ef,%esi
  13:	48 c7 c2 80 af 4d 8b 	mov    $0xffffffff8b4daf80,%rdx
  1a:	e8 e6 f5 af fd       	call   0xfdaff605
  1f:	4d 8d 75 20          	lea    0x20(%r13),%r14
  23:	4d 89 f7             	mov    %r14,%r15
  26:	49 c1 ef 03          	shr    $0x3,%r15
* 2a:	43 0f b6 04 27       	movzbl (%r15,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 b6 06 00 00    	jne    0x6ed
  37:	41 0f b7 1e          	movzwl (%r14),%ebx
  3b:	89 de                	mov    %ebx,%esi
  3d:	81                   	.byte 0x81
  3e:	e6 00                	out    %al,$0x0