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: 10722 Comm: syz.0.1500 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1471 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2331 [inline]
RIP: 0010:gfs2_dump_glock+0xbde/0x1830 fs/gfs2/glock.c:2445
Code: c6 05 54 5e 7f 0a 01 48 c7 c7 e0 15 d2 8a be 19 03 00 00 48 c7 c2 20 16 d2 8a e8 8d 18 d8 fd 4d 8d 7d 20 4c 89 fb 48 c1 eb 03 <42> 0f b6 04 23 84 c0 0f 85 9e 06 00 00 45 0f b7 37 44 89 f6 81 e6
RSP: 0018:ffffc9000dbff2a0 EFLAGS: 00010202
RAX: ffffffff838b8e6b RBX: 0000000000000004 RCX: 0000000000080000
RDX: ffffc9000ea29000 RSI: 000000000002c8d2 RDI: 000000000002c8d3
RBP: ffffc9000dbff590 R08: dffffc0000000000 R09: fffffbfff215c449
R10: fffffbfff215c449 R11: 1ffffffff215c448 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000020
FS:  00007f678e2196c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000008000 CR3: 000000002dfdb000 CR4: 00000000003506f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 gfs2_consist_inode_i+0xf1/0x110 fs/gfs2/util.c:467
 gfs2_dirent_scan+0x525/0x650 fs/gfs2/dir.c:602
 gfs2_dirent_search+0x2dd/0x7e0 fs/gfs2/dir.c:850
 gfs2_dir_search+0x49/0x220 fs/gfs2/dir.c:1650
 gfs2_lookupi+0x45f/0x640 fs/gfs2/inode.c:323
 __gfs2_lookup+0x8c/0x260 fs/gfs2/inode.c:871
 __lookup_slow+0x27d/0x3a0 fs/namei.c:1698
 lookup_slow+0x53/0x70 fs/namei.c:1715
 walk_component+0x2be/0x3f0 fs/namei.c:2006
 lookup_last fs/namei.c:2463 [inline]
 path_lookupat+0x169/0x440 fs/namei.c:2487
 filename_lookup+0x1f0/0x500 fs/namei.c:2516
 user_path_at_empty+0x3e/0x60 fs/namei.c:2913
 user_path_at include/linux/namei.h:57 [inline]
 do_mount fs/namespace.c:3418 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount+0x297/0x3c0 fs/namespace.c:3606
 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: 0033:0x7f678d38f749
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:00007f678e219038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f678d5e6090 RCX: 00007f678d38f749
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000000
RBP: 00007f678d413f91 R08: 0000200000000100 R09: 0000000000000000
R10: 0000000000800000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f678d5e6128 R14: 00007f678d5e6090 R15: 00007ffe6a4b1838
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1471 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2331 [inline]
RIP: 0010:gfs2_dump_glock+0xbde/0x1830 fs/gfs2/glock.c:2445
Code: c6 05 54 5e 7f 0a 01 48 c7 c7 e0 15 d2 8a be 19 03 00 00 48 c7 c2 20 16 d2 8a e8 8d 18 d8 fd 4d 8d 7d 20 4c 89 fb 48 c1 eb 03 <42> 0f b6 04 23 84 c0 0f 85 9e 06 00 00 45 0f b7 37 44 89 f6 81 e6
RSP: 0018:ffffc9000dbff2a0 EFLAGS: 00010202
RAX: ffffffff838b8e6b RBX: 0000000000000004 RCX: 0000000000080000
RDX: ffffc9000ea29000 RSI: 000000000002c8d2 RDI: 000000000002c8d3
RBP: ffffc9000dbff590 R08: dffffc0000000000 R09: fffffbfff215c449
R10: fffffbfff215c449 R11: 1ffffffff215c448 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000020
FS:  00007f678e2196c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe05ebdff8 CR3: 000000002dfdb000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c6 05 54 5e 7f 0a 01 	movb   $0x1,0xa7f5e54(%rip)        # 0xa7f5e5b
   7:	48 c7 c7 e0 15 d2 8a 	mov    $0xffffffff8ad215e0,%rdi
   e:	be 19 03 00 00       	mov    $0x319,%esi
  13:	48 c7 c2 20 16 d2 8a 	mov    $0xffffffff8ad21620,%rdx
  1a:	e8 8d 18 d8 fd       	call   0xfdd818ac
  1f:	4d 8d 7d 20          	lea    0x20(%r13),%r15
  23:	4c 89 fb             	mov    %r15,%rbx
  26:	48 c1 eb 03          	shr    $0x3,%rbx
* 2a:	42 0f b6 04 23       	movzbl (%rbx,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 9e 06 00 00    	jne    0x6d5
  37:	45 0f b7 37          	movzwl (%r15),%r14d
  3b:	44 89 f6             	mov    %r14d,%esi
  3e:	81                   	.byte 0x81
  3f:	e6                   	.byte 0xe6