loop0: detected capacity change from 0 to 32768
gfs2: fsid=noยล ar?d: Trying to join cluster "lock_nolock", "noยล ar?d"
gfs2: fsid=noยล ar?d: Now mounting FS (format 1801)...
syz-executor.0: attempt to access beyond end of device
loop0: rw=12288, sector=131072, nr_sectors = 8 limit=32768
BUG: kernel NULL pointer dereference, address: 000000000000002b
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 109bb1067 P4D 109bb1067 PUD 109bfc067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 2552 Comm: syz-executor.0 Not tainted 6.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:gfs2_lookup_simple+0x63/0xa0 fs/gfs2/inode.c:286
Code: ff ff ff ff 48 63 d0 89 44 24 04 e8 77 75 18 00 ba 01 00 00 00 48 89 ef f7 d0 48 89 e6 89 04 24 e8 f2 eb ff ff 48 85 c0 74 25 <48> 8b 50 30 c7 82 f0 00 00 00 40 0c 00 00 48 8b 54 24 10 65 48 2b
RSP: 0018:ffffc900022fbc30 EFLAGS: 00010282
RAX: fffffffffffffffb RBX: ffffffff82ae8bab RCX: ffffc900022fbb2c
RDX: 0000000000000000 RSI: ffffffff82ad1636 RDI: 00000000ffffffff
RBP: ffff88817db10638 R08: 0000000000000555 R09: ffff888105b63fd8
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffffc900022fbc90 R14: ffff888107f99268 R15: ffff88817db10638
FS:  00007ff6b6c8b6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000002b CR3: 0000000109b86000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 init_journal+0x13e/0xc70 fs/gfs2/ops_fstype.c:742
 init_inodes fs/gfs2/ops_fstype.c:885 [inline]
 gfs2_fill_super+0x948/0xf20 fs/gfs2/ops_fstype.c:1248
 get_tree_bdev+0x172/0x280 fs/super.c:1318
 gfs2_get_tree+0x20/0x90 fs/gfs2/ops_fstype.c:1333
 vfs_get_tree+0x1c/0x90 fs/super.c:1519
 do_new_mount fs/namespace.c:3335 [inline]
 path_mount+0x48a/0xb80 fs/namespace.c:3662
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount fs/namespace.c:3861 [inline]
 __x64_sys_mount+0x111/0x150 fs/namespace.c:3861
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff6b5e7e1ea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff6b6c8aee8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ff6b6c8af80 RCX: 00007ff6b5e7e1ea
RDX: 0000000020000000 RSI: 0000000020000040 RDI: 00007ff6b6c8af40
RBP: 0000000020000000 R08: 00007ff6b6c8af80 R09: 0000000000000819
R10: 0000000000000819 R11: 0000000000000246 R12: 0000000020000040
R13: 00007ff6b6c8af40 R14: 0000000000012607 R15: 0000000020000080
 </TASK>
Modules linked in:
CR2: 000000000000002b
---[ end trace 0000000000000000 ]---
RIP: 0010:gfs2_lookup_simple+0x63/0xa0 fs/gfs2/inode.c:286
Code: ff ff ff ff 48 63 d0 89 44 24 04 e8 77 75 18 00 ba 01 00 00 00 48 89 ef f7 d0 48 89 e6 89 04 24 e8 f2 eb ff ff 48 85 c0 74 25 <48> 8b 50 30 c7 82 f0 00 00 00 40 0c 00 00 48 8b 54 24 10 65 48 2b
RSP: 0018:ffffc900022fbc30 EFLAGS: 00010282
RAX: fffffffffffffffb RBX: ffffffff82ae8bab RCX: ffffc900022fbb2c
RDX: 0000000000000000 RSI: ffffffff82ad1636 RDI: 00000000ffffffff
RBP: ffff88817db10638 R08: 0000000000000555 R09: ffff888105b63fd8
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffffc900022fbc90 R14: ffff888107f99268 R15: ffff88817db10638
FS:  00007ff6b6c8b6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000002b CR3: 0000000109b86000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	ff 48 63             	decl   0x63(%rax)
   3:	d0 89 44 24 04 e8    	rorb   -0x17fbdbbc(%rcx)
   9:	77 75                	ja     0x80
   b:	18 00                	sbb    %al,(%rax)
   d:	ba 01 00 00 00       	mov    $0x1,%edx
  12:	48 89 ef             	mov    %rbp,%rdi
  15:	f7 d0                	not    %eax
  17:	48 89 e6             	mov    %rsp,%rsi
  1a:	89 04 24             	mov    %eax,(%rsp)
  1d:	e8 f2 eb ff ff       	call   0xffffec14
  22:	48 85 c0             	test   %rax,%rax
  25:	74 25                	je     0x4c
* 27:	48 8b 50 30          	mov    0x30(%rax),%rdx <-- trapping instruction
  2b:	c7 82 f0 00 00 00 40 	movl   $0xc40,0xf0(%rdx)
  32:	0c 00 00
  35:	48 8b 54 24 10       	mov    0x10(%rsp),%rdx
  3a:	65                   	gs
  3b:	48                   	rex.W
  3c:	2b                   	.byte 0x2b