syzbot

gfs2: fsid=syz:syz.0: first mount done, others may mount
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WARNING: CPU: 1 PID: 4991 at fs/gfs2/rgrp.c:2628 gfs2_rbm_from_block fs/gfs2/rgrp.c:279 [inline]
WARNING: CPU: 1 PID: 4991 at fs/gfs2/rgrp.c:2628 gfs2_check_blk_type+0x449/0x670 fs/gfs2/rgrp.c:2627
Modules linked in:
CPU: 1 PID: 4991 Comm: syz-executor421 Not tainted 6.4.0-rc3-syzkaller-00008-gae8373a5add4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
RIP: 0010:gfs2_check_blk_type+0x449/0x670 fs/gfs2/rgrp.c:2628
Code: 85 d2 01 00 00 8b 1b 89 df 44 89 f6 e8 70 7b cf fd 4c 89 74 24 10 44 39 f3 76 21 e8 e1 79 cf fd 45 31 ed eb 6e e8 d7 79 cf fd <0f> 0b 41 bf f9 ff ff ff 48 8b 5c 24 18 e9 46 01 00 00 e8 c0 79 cf
RSP: 0018:ffffc9000398f8c0 EFLAGS: 00010293
RAX: ffffffff83bc0218 RBX: ffff88807cbec028 RCX: ffff888021570000
RDX: 0000000000000000 RSI: 0000000000000012 RDI: 0000000000000013
RBP: ffffc9000398f9d0 R08: ffffffff83bc020e R09: ffffed100ec36579
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100f97d806
R13: ffff88807cbec000 R14: 0000000000000012 R15: 0000000000000013
FS:  000055555717d300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005593d4247008 CR3: 0000000073740000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 gfs2_inode_lookup+0xb01/0xc50 fs/gfs2/inode.c:178
 gfs2_lookup_by_inum+0x51/0xf0 fs/gfs2/inode.c:250
 gfs2_get_dentry fs/gfs2/export.c:139 [inline]
 gfs2_fh_to_dentry+0x135/0x200 fs/gfs2/export.c:162
 exportfs_decode_fh_raw+0x144/0x590 fs/exportfs/expfs.c:435
 exportfs_decode_fh+0x3c/0x70 fs/exportfs/expfs.c:575
 do_handle_to_path fs/fhandle.c:152 [inline]
 handle_to_path fs/fhandle.c:207 [inline]
 do_handle_open+0x450/0x960 fs/fhandle.c:223
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f80733eb7b9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd20a75c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f80733eb7b9
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000004
RBP: 00007f80733ab050 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000124d6 R11: 0000000000000246 R12: 00007f80733ab0e0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>