general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
CPU: 0 PID: 7875 Comm: syz.3.581 Not tainted 6.6.101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1502 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2308 [inline]
RIP: 0010:gfs2_dump_glock+0xd5f/0x1920 fs/gfs2/glock.c:2424
Code: 60 8e ef 8a be 14 03 00 00 48 c7 c2 a0 8e ef 8a e8 56 ae c8 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 10 06 00 00 48 89 5c 24 38 0f b7 1b 89
RSP: 0018:ffffc9000f6372c0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 00000000000000cb RCX: 0000000000080000
RDX: ffffc9000c9aa000 RSI: 00000000000115a8 RDI: 00000000000115a9
RBP: ffffc9000f6375b0 R08: dffffc0000000000 R09: 1ffffffff21b46a4
R10: dffffc0000000000 R11: fffffbfff21b46a5 R12: ffffffff839f0c4f
R13: 00000000000000ab R14: 0000000000000019 R15: 0000000000000000
FS:  00007f79a50716c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4e0bdfab10 CR3: 000000005d7c4000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 gfs2_consist_inode_i+0xf5/0x110 fs/gfs2/util.c:455
 gfs2_dirent_scan+0x525/0x650 fs/gfs2/dir.c:602
 gfs2_dirent_search+0x2e1/0x7e0 fs/gfs2/dir.c:850
 gfs2_dir_search+0x4d/0x220 fs/gfs2/dir.c:1650
 gfs2_lookupi+0x3d9/0x5a0 fs/gfs2/inode.c:339
 __gfs2_lookup+0x90/0x270 fs/gfs2/inode.c:896
 __lookup_slow+0x281/0x3b0 fs/namei.c:1694
 lookup_slow+0x53/0x70 fs/namei.c:1711
 walk_component+0x2be/0x3f0 fs/namei.c:2002
 lookup_last fs/namei.c:2459 [inline]
 path_lookupat+0x169/0x440 fs/namei.c:2483
 filename_lookup+0x1f4/0x510 fs/namei.c:2512
 user_path_at_empty+0x42/0x60 fs/namei.c:2909
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3708 [inline]
 __do_sys_mount fs/namespace.c:3920 [inline]
 __se_sys_mount+0x29b/0x3c0 fs/namespace.c:3897
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f79a418ebe9
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:00007f79a5071038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f79a43b5fa0 RCX: 00007f79a418ebe9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000000
RBP: 00007f79a4211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000081000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f79a43b6038 R14: 00007f79a43b5fa0 R15: 00007ffd90b444a8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1502 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2308 [inline]
RIP: 0010:gfs2_dump_glock+0xd5f/0x1920 fs/gfs2/glock.c:2424
Code: 60 8e ef 8a be 14 03 00 00 48 c7 c2 a0 8e ef 8a e8 56 ae c8 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 10 06 00 00 48 89 5c 24 38 0f b7 1b 89
RSP: 0018:ffffc9000f6372c0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 00000000000000cb RCX: 0000000000080000
RDX: ffffc9000c9aa000 RSI: 00000000000115a8 RDI: 00000000000115a9
RBP: ffffc9000f6375b0 R08: dffffc0000000000 R09: 1ffffffff21b46a4
R10: dffffc0000000000 R11: fffffbfff21b46a5 R12: ffffffff839f0c4f
R13: 00000000000000ab R14: 0000000000000019 R15: 0000000000000000
FS:  00007f79a50716c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe85a203f98 CR3: 000000005d7c4000 CR4: 00000000003506f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	8e ef                	mov    %edi,%gs
   2:	8a be 14 03 00 00    	mov    0x314(%rsi),%bh
   8:	48 c7 c2 a0 8e ef 8a 	mov    $0xffffffff8aef8ea0,%rdx
   f:	e8 56 ae c8 fd       	call   0xfdc8ae6a
  14:	49 8d 5d 20          	lea    0x20(%r13),%rbx
  18:	49 89 de             	mov    %rbx,%r14
  1b:	49 c1 ee 03          	shr    $0x3,%r14
  1f:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  26:	fc ff df
* 29:	41 0f b6 04 06       	movzbl (%r14,%rax,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 10 06 00 00    	jne    0x646
  36:	48 89 5c 24 38       	mov    %rbx,0x38(%rsp)
  3b:	0f b7 1b             	movzwl (%rbx),%ebx
  3e:	89                   	.byte 0x89