loop0: detected capacity change from 0 to 32768
gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents in 3ms
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+0x420/0x670 fs/gfs2/rgrp.c:2628, CPU#0: syz.0.0/5341
Modules linked in:
CPU: 0 UID: 0 PID: 5341 Comm: syz.0.0 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+0x420/0x670 fs/gfs2/rgrp.c:2628
Code: 04 28 84 c0 0f 85 fa 01 00 00 8b 1b 89 df 44 89 e6 e8 b4 1e 9d fd 44 39 e3 76 26 e8 ea 1c 9d fd 31 db eb 74 e8 e1 1c 9d fd 90 <0f> 0b 90 bb f9 ff ff ff 49 bd 00 00 00 00 00 fc ff df e9 10 01 00
RSP: 0000:ffffc9000e51f820 EFLAGS: 00010283
RAX: ffffffff8428c369 RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000ed62000 RSI: 00000000000009a7 RDI: 00000000000009a8
RBP: ffffc9000e51f930 R08: ffff888047bbc647 R09: 1ffff11008f778c8
R10: dffffc0000000000 R11: ffffed1008f778c9 R12: 0000000000000044
R13: 0000000000000047 R14: ffff888011c43b18 R15: 1ffff11002388764
FS:  00007f07ef3326c0(0000) GS:ffff88808c809000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f07ee60e4b0 CR3: 000000001f0f7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 gfs2_inode_lookup+0xade/0xc50 fs/gfs2/inode.c:192
 gfs2_lookup_by_inum+0x52/0x100 fs/gfs2/inode.c:265
 gfs2_get_dentry fs/gfs2/export.c:139 [inline]
 gfs2_fh_to_dentry+0x136/0x1f0 fs/gfs2/export.c:160
 exportfs_decode_fh_raw+0x1c8/0x760 fs/exportfs/expfs.c:457
 do_handle_to_path+0xa4/0x1a0 fs/fhandle.c:274
 handle_to_path fs/fhandle.c:397 [inline]
 do_handle_open+0x6dc/0x970 fs/fhandle.c:421
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f07ee39c819
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:00007f07ef331fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007f07ee615fa0 RCX: 00007f07ee39c819
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000004
RBP: 00007f07ee432c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f07ee616038 R14: 00007f07ee615fa0 R15: 00007fff9b0eca88
 </TASK>