gfs2: fsid=syz:syz.0:  H: s:SH f:H e:0 p:6952 [syz.0.362] __gfs2_lookup+0xad/0x2a0 fs/gfs2/inode.c:896
general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 1 PID: 6997 Comm: syz.0.362 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:1500 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2306 [inline]
RIP: 0010:gfs2_dump_glock+0xe1f/0x1a50 fs/gfs2/glock.c:2422
Code: c2 a0 a2 0f 8b e8 f1 58 c0 fd ba 20 00 00 00 48 8d bc 24 c0 00 00 00 31 f6 e8 fd bf 36 fe 4d 8d 7c 24 20 4d 89 fd 49 c1 ed 03 <43> 0f b6 44 35 00 84 c0 0f 85 78 06 00 00 41 0f b7 1f 89 de 81 e6
RSP: 0018:ffffc90005397740 EFLAGS: 00010207
RAX: ffffc90005397800 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90005397820
RBP: ffffc90005397a30 R08: ffffc9000539781f R09: 0000000000000000
R10: ffffc90005397800 R11: fffff52000a72f04 R12: 0000000000000046
R13: 000000000000000c R14: dffffc0000000000 R15: 0000000000000066
FS:  00007f43fdac46c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d722ff8 CR3: 000000007b917000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 gfs2_consist_inode_i+0xf5/0x110 fs/gfs2/util.c:446
 gfs2_dirent_scan+0x525/0x650 fs/gfs2/dir.c:602
 gfs2_dir_read+0x7d5/0x1800 fs/gfs2/dir.c:1599
 gfs2_readdir+0x16d/0x1e0 fs/gfs2/file.c:116
 iterate_dir+0x1c2/0x580 fs/readdir.c:106
 __do_sys_getdents64 fs/readdir.c:405 [inline]
 __se_sys_getdents64+0xf6/0x270 fs/readdir.c:390
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f43fcb9aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f43fdac4028 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f43fce16090 RCX: 00007f43fcb9aeb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f43fcc08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f43fce16128 R14: 00007f43fce16090 R15: 00007ffd2648d4c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pid_is_meaningful fs/gfs2/glock.c:1500 [inline]
RIP: 0010:dump_holder fs/gfs2/glock.c:2306 [inline]
RIP: 0010:gfs2_dump_glock+0xe1f/0x1a50 fs/gfs2/glock.c:2422
Code: c2 a0 a2 0f 8b e8 f1 58 c0 fd ba 20 00 00 00 48 8d bc 24 c0 00 00 00 31 f6 e8 fd bf 36 fe 4d 8d 7c 24 20 4d 89 fd 49 c1 ed 03 <43> 0f b6 44 35 00 84 c0 0f 85 78 06 00 00 41 0f b7 1f 89 de 81 e6
RSP: 0018:ffffc90005397740 EFLAGS: 00010207
RAX: ffffc90005397800 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90005397820
RBP: ffffc90005397a30 R08: ffffc9000539781f R09: 0000000000000000
R10: ffffc90005397800 R11: fffff52000a72f04 R12: 0000000000000046
R13: 000000000000000c R14: dffffc0000000000 R15: 0000000000000066
FS:  00007f43fdac46c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d722ff8 CR3: 000000007b917000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
   0:	c2 a0 a2             	ret    $0xa2a0
   3:	0f 8b e8 f1 58 c0    	jnp    0xc058f1f1
   9:	fd                   	std
   a:	ba 20 00 00 00       	mov    $0x20,%edx
   f:	48 8d bc 24 c0 00 00 	lea    0xc0(%rsp),%rdi
  16:	00
  17:	31 f6                	xor    %esi,%esi
  19:	e8 fd bf 36 fe       	call   0xfe36c01b
  1e:	4d 8d 7c 24 20       	lea    0x20(%r12),%r15
  23:	4d 89 fd             	mov    %r15,%r13
  26:	49 c1 ed 03          	shr    $0x3,%r13
* 2a:	43 0f b6 44 35 00    	movzbl 0x0(%r13,%r14,1),%eax <-- trapping instruction
  30:	84 c0                	test   %al,%al
  32:	0f 85 78 06 00 00    	jne    0x6b0
  38:	41 0f b7 1f          	movzwl (%r15),%ebx
  3c:	89 de                	mov    %ebx,%esi
  3e:	81                   	.byte 0x81
  3f:	e6                   	.byte 0xe6