gfs2: fsid=syz:syz.0: first mount done, others may mount
------------[ cut here ]------------
WARNING: CPU: 1 PID: 6599 at fs/gfs2/rgrp.c:2628 gfs2_check_blk_type+0x403/0x650 fs/gfs2/rgrp.c:2628
Modules linked in:
CPU: 1 UID: 0 PID: 6599 Comm: syz.0.16 Not tainted 6.16.0-rc5-syzkaller-00266-g3f31a806a62e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:gfs2_check_blk_type+0x403/0x650 fs/gfs2/rgrp.c:2628
Code: 04 28 84 c0 0f 85 f5 01 00 00 8b 1b 89 df 44 89 e6 e8 b1 34 c8 fd 44 39 e3 76 26 e8 e7 32 c8 fd 31 db eb 74 e8 de 32 c8 fd 90 <0f> 0b 90 bb f9 ff ff ff 49 bd 00 00 00 00 00 fc ff df e9 1c 01 00
RSP: 0018:ffffc900030e7820 EFLAGS: 00010293
RAX: ffffffff83f7ffec RBX: 0000000000000000 RCX: ffff8880793ada00
RDX: 0000000000000000 RSI: 0000000000000012 RDI: 0000000000000013
RBP: ffffc900030e7930 R08: ffff888059d8aee7 R09: 1ffff1100b3b15dc
R10: dffffc0000000000 R11: ffffed100b3b15dd R12: 0000000000000012
R13: 0000000000000013 R14: ffff88805dd9e028 R15: 1ffff1100bbb3c06
FS:  00007f973f24e6c0(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32b5ffff CR3: 0000000077039000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 gfs2_inode_lookup+0x9c5/0xb10 fs/gfs2/inode.c:178
 gfs2_lookup_by_inum+0x52/0x100 fs/gfs2/inode.c:251
 gfs2_get_dentry fs/gfs2/export.c:139 [inline]
 gfs2_fh_to_dentry+0x136/0x1f0 fs/gfs2/export.c:160
 exportfs_decode_fh_raw+0x17d/0x740 fs/exportfs/expfs.c:456
 do_handle_to_path+0xa4/0x1a0 fs/fhandle.c:257
 handle_to_path fs/fhandle.c:385 [inline]
 do_handle_open+0x6ab/0x850 fs/fhandle.c:403
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f973e38d169
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:00007f973f24e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007f973e5a5fa0 RCX: 00007f973e38d169
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000004
RBP: 00007f973e40e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f973e5a5fa0 R15: 00007ffdcf3f7498
 </TASK>