gfs2: fsid=syz:syz.0:  H: s:UN f: e:0 p:0 [(ended)] 0xffff888020bbdf50
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 1 UID: 0 PID: 7069 Comm: syz.1.67 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1470 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2278 [inline]
RIP: 0010:gfs2_dump_glock+0xfbb/0x1bc0 fs/gfs2/glock.c:2398
Code: c0 d1 f0 8b be 4b 03 00 00 48 c7 c2 00 d2 f0 8b e8 8a cb a6 fd 49 8d 5d 20 49 89 de 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 0f 85 28 06 00 00 48 89 5c 24 28 0f b7 1b 89
RSP: 0000:ffffc90003397220 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000020 RCX: ffff8880345e3c00
RDX: 0000000000000000 RSI: ffffffff8c0370e0 RDI: ffffffff8c0370a0
RBP: ffffc90003397510 R08: 0000000000000000 R09: ffffffff83f7cd6b
R10: dffffc0000000000 R11: fffffbfff1f87d67 R12: ffffffff83f7cd6b
R13: 0000000000000000 R14: 0000000000000004 R15: 0000000000000000
FS:  00007f20a4a9e6c0(0000) GS:ffff888125afa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f61fe084000 CR3: 000000007803c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 gfs2_consist_inode_i+0xf5/0x110 fs/gfs2/util.c:446
 gfs2_dirent_scan+0x545/0x690 fs/gfs2/dir.c:-1
 gfs2_dirent_search+0x2cb/0x710 fs/gfs2/dir.c:854
 gfs2_dir_search+0x4c/0x220 fs/gfs2/dir.c:1651
 gfs2_lookupi+0x3d9/0x5a0 fs/gfs2/inode.c:340
 __gfs2_lookup+0x8f/0x270 fs/gfs2/inode.c:975
 gfs2_atomic_open+0x92/0x220 fs/gfs2/inode.c:1377
 atomic_open fs/namei.c:3568 [inline]
 lookup_open fs/namei.c:3679 [inline]
 open_last_lookups fs/namei.c:3807 [inline]
 path_openat+0xf66/0x3830 fs/namei.c:4043
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_open fs/open.c:1458 [inline]
 __se_sys_open fs/open.c:1454 [inline]
 __x64_sys_open+0x11e/0x150 fs/open.c:1454
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f20a3d7dff9
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:00007f20a4a9e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f20a3f36058 RCX: 00007f20a3d7dff9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007f20a3df0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f20a3f36058 R15: 00007fff65efea88
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1470 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2278 [inline]
RIP: 0010:gfs2_dump_glock+0xfbb/0x1bc0 fs/gfs2/glock.c:2398
Code: c0 d1 f0 8b be 4b 03 00 00 48 c7 c2 00 d2 f0 8b e8 8a cb a6 fd 49 8d 5d 20 49 89 de 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 0f 85 28 06 00 00 48 89 5c 24 28 0f b7 1b 89
RSP: 0000:ffffc90003397220 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000020 RCX: ffff8880345e3c00
RDX: 0000000000000000 RSI: ffffffff8c0370e0 RDI: ffffffff8c0370a0
RBP: ffffc90003397510 R08: 0000000000000000 R09: ffffffff83f7cd6b
R10: dffffc0000000000 R11: fffffbfff1f87d67 R12: ffffffff83f7cd6b
R13: 0000000000000000 R14: 0000000000000004 R15: 0000000000000000
FS:  00007f20a4a9e6c0(0000) GS:ffff888125afa000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555593b28808 CR3: 000000007803c000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	c0 d1 f0             	rcl    $0xf0,%cl
   3:	8b be 4b 03 00 00    	mov    0x34b(%rsi),%edi
   9:	48 c7 c2 00 d2 f0 8b 	mov    $0xffffffff8bf0d200,%rdx
  10:	e8 8a cb a6 fd       	call   0xfda6cb9f
  15:	49 8d 5d 20          	lea    0x20(%r13),%rbx
  19:	49 89 de             	mov    %rbx,%r14
  1c:	49 c1 ee 03          	shr    $0x3,%r14
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	41 0f b6 04 06       	movzbl (%r14,%rax,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 28 06 00 00    	jne    0x65f
  37:	48 89 5c 24 28       	mov    %rbx,0x28(%rsp)
  3c:	0f b7 1b             	movzwl (%rbx),%ebx
  3f:	89                   	.byte 0x89