gfs2: fsid=syz:syz.0: first mount done, others may mount
------------[ cut here ]------------
error
WARNING: fs/gfs2/rgrp.c:2628 at gfs2_check_blk_type+0x2da/0x370 fs/gfs2/rgrp.c:2628, CPU#0: syz-executor.0/5964
Modules linked in:
CPU: 0 UID: 0 PID: 5964 Comm: syz-executor.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:gfs2_check_blk_type+0x2da/0x370 fs/gfs2/rgrp.c:2628
Code: 89 e7 e8 79 a5 f9 ff eb a8 89 44 24 08 89 4c 24 18 e8 ca ae 07 fe 48 63 44 24 08 8b 4c 24 18 e9 ab fe ff ff e8 f7 c9 99 fd 90 <0f> 0b 90 41 bf f9 ff ff ff e9 6c ff ff ff 41 bf ea ff ff ff e9 6e
RSP: 0018:ffffc90004237910 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff92000846f26 RCX: ffffffff846ee4d4
RDX: ffff888025b74a80 RSI: ffffffff846ee669 RDI: ffff888025b74a80
RBP: ffffc90004237a20 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff9 R11: ffffffff81d553f2 R12: ffffc90004237970
R13: 0000000000000012 R14: ffff88803edd6af0 R15: 00000000fffffff9
FS:  00007fe3c406f6c0(0000) GS:ffff8880d6383000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe3c32e1c4e CR3: 000000003fd59000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 gfs2_inode_lookup+0x765/0x920 fs/gfs2/inode.c:192
 gfs2_lookup_by_inum+0x48/0x100 fs/gfs2/inode.c:265
 gfs2_get_dentry fs/gfs2/export.c:139 [inline]
 gfs2_fh_to_dentry+0x18e/0x200 fs/gfs2/export.c:160
 exportfs_decode_fh_raw+0x167/0x760 fs/exportfs/expfs.c:457
 do_handle_to_path fs/fhandle.c:274 [inline]
 handle_to_path fs/fhandle.c:397 [inline]
 do_handle_open+0x744/0xce0 fs/fhandle.c:421
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe3c326e3b9
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 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe3c406f078 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007fe3c33abf80 RCX: 00007fe3c326e3b9
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000004
RBP: 00007fe3c32cf498 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fe3c33abf80 R15: 00007ffcaecc0618
 </TASK>