gfs2: fsid=syz:syz.0:  H: s:UN f: e:0 p:0 [‰ö1Ò[A\A]A^A_]ée] 0x249143b0807a913d
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 1 UID: 0 PID: 5521 Comm: syz.1.29 Not tainted 6.12.0-rc3-next-20241016-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1456 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2284 [inline]
RIP: 0010:gfs2_dump_glock+0xf05/0x1bb0 fs/gfs2/glock.c:2400
Code: c6 05 17 fd 21 0c 01 48 c7 c7 a0 6f 4f 8c be 53 03 00 00 48 c7 c2 e0 6f 4f 8c e8 c6 5d 8b 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:ffffc9000334f6a0 EFLAGS: 00010202
RAX: ffffffff83e55182 RBX: 0000000000000001 RCX: ffff888029773c00
RDX: 0000000000000000 RSI: ffffffff8c6119e0 RDI: ffffffff8c6119a0
RBP: ffffc9000334f990 R08: ffffffff83e5516b R09: 1ffffffff285d300
R10: dffffc0000000000 R11: fffffbfff285d301 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000020 R15: 0000000000000004
FS:  00007fa3dd2616c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c001a31180 CR3: 00000000261aa000 CR4: 00000000003526f0
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:457
 gfs2_dirent_scan+0x52b/0x670
 gfs2_dir_read+0x82f/0x1af0 fs/gfs2/dir.c:1602
 gfs2_readdir+0x14b/0x1b0 fs/gfs2/file.c:116
 iterate_dir+0x571/0x800 fs/readdir.c:108
 __do_sys_getdents fs/readdir.c:324 [inline]
 __se_sys_getdents+0x1ef/0x4d0 fs/readdir.c:309
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa3dc37dff9
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:00007fa3dd261038 EFLAGS: 00000246
 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007fa3dc535f80 RCX: 00007fa3dc37dff9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007fa3dc3f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa3dc535f80 R15: 00007ffccad72908
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1456 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2284 [inline]
RIP: 0010:gfs2_dump_glock+0xf05/0x1bb0 fs/gfs2/glock.c:2400
Code: c6 05 17 fd 21 0c 01 48 c7 c7 a0 6f 4f 8c be 53 03 00 00 48 c7 c2 e0 6f 4f 8c e8 c6 5d 8b 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:ffffc9000334f6a0 EFLAGS: 00010202

RAX: ffffffff83e55182 RBX: 0000000000000001 RCX: ffff888029773c00
RDX: 0000000000000000 RSI: ffffffff8c6119e0 RDI: ffffffff8c6119a0
RBP: ffffc9000334f990 R08: ffffffff83e5516b R09: 1ffffffff285d300
R10: dffffc0000000000 R11: fffffbfff285d301 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000020 R15: 0000000000000004
FS:  00007fa3dd2616c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c001a31180 CR3: 00000000261aa000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c6 05 17 fd 21 0c 01 	movb   $0x1,0xc21fd17(%rip)        # 0xc21fd1e
   7:	48 c7 c7 a0 6f 4f 8c 	mov    $0xffffffff8c4f6fa0,%rdi
   e:	be 53 03 00 00       	mov    $0x353,%esi
  13:	48 c7 c2 e0 6f 4f 8c 	mov    $0xffffffff8c4f6fe0,%rdx
  1a:	e8 c6 5d 8b fd       	call   0xfd8b5de5
  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