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.s: fatal: invalid metadata block - bh = 21 (bad magic number), function = gfs2_meta_buffer, file = fs/gfs2/meta_io.c, line = 499
gfs2: fsid=syz:syz.s: about to withdraw this file system
------------[ cut here ]------------
kernel BUG at fs/gfs2/util.c:331!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5318 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~bpo12+1 04/01/2014
RIP: 0010:gfs2_withdraw+0x1376/0x1430 fs/gfs2/util.c:331
Code: ff ff 48 8b 4c 24 18 80 e1 07 80 c1 03 38 c1 0f 8c 55 fb ff ff 48 8b 7c 24 18 e8 75 84 22 fe e9 46 fb ff ff e8 5b 5c bb fd 90 <0f> 0b 48 8b 4c 24 18 80 e1 07 80 c1 03 38 c1 0f 8c ab fb ff ff 48
RSP: 0018:ffffc9000d4c6e00 EFLAGS: 00010283
RAX: ffffffff84044745 RBX: ffffc9000d4c6ec0 RCX: 0000000000100000
RDX: ffffc9000e6d3000 RSI: 0000000000008d4b RDI: 0000000000008d4c
RBP: ffffc9000d4c6fa0 R08: ffff88801fc24293 R09: 1ffff11003f84852
R10: dffffc0000000000 R11: ffffed1003f84853 R12: dffffc0000000000
R13: 1ffff92001a98dd4 R14: 1ffff11007d79015 R15: 0000000000000004
FS:  00007f102f2cc6c0(0000) GS:ffff88808d306000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6ef43ba000 CR3: 0000000011589000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 gfs2_metatype_check_i fs/gfs2/util.h:126 [inline]
 gfs2_meta_buffer+0x225/0x2e0 fs/gfs2/meta_io.c:499
 __fillup_metapath+0x153/0x350 fs/gfs2/bmap.c:334
 lookup_metapath fs/gfs2/bmap.c:361 [inline]
 __gfs2_iomap_get+0x70f/0x13d0 fs/gfs2/bmap.c:907
 gfs2_iomap_get fs/gfs2/bmap.c:1420 [inline]
 gfs2_block_map+0x22c/0x670 fs/gfs2/bmap.c:1232
 gfs2_write_alloc_required+0x369/0x620 fs/gfs2/bmap.c:2335
 gfs2_jdesc_check+0x21a/0x2f0 fs/gfs2/super.c:118
 check_journal_clean+0x158/0x310 fs/gfs2/util.c:69
 init_journal+0x17f8/0x2260 fs/gfs2/ops_fstype.c:793
 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:851
 gfs2_fill_super+0x1923/0x20d0 fs/gfs2/ops_fstype.c:1255
 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1691
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1337
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1751
 fc_mount fs/namespace.c:1208 [inline]
 do_new_mount_fc fs/namespace.c:3651 [inline]
 do_new_mount+0x302/0xa10 fs/namespace.c:3727
 do_mount fs/namespace.c:4050 [inline]
 __do_sys_mount fs/namespace.c:4238 [inline]
 __se_sys_mount+0x313/0x410 fs/namespace.c:4215
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f102e39066a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f102f2cbe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f102f2cbef0 RCX: 00007f102e39066a
RDX: 0000200000000400 RSI: 0000200000012500 RDI: 00007f102f2cbeb0
RBP: 0000200000000400 R08: 00007f102f2cbef0 R09: 0000000000200000
R10: 0000000000200000 R11: 0000000000000246 R12: 0000200000012500
R13: 00007f102f2cbeb0 R14: 00000000000125ea R15: 0000200000000300
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gfs2_withdraw+0x1376/0x1430 fs/gfs2/util.c:331
Code: ff ff 48 8b 4c 24 18 80 e1 07 80 c1 03 38 c1 0f 8c 55 fb ff ff 48 8b 7c 24 18 e8 75 84 22 fe e9 46 fb ff ff e8 5b 5c bb fd 90 <0f> 0b 48 8b 4c 24 18 80 e1 07 80 c1 03 38 c1 0f 8c ab fb ff ff 48
RSP: 0018:ffffc9000d4c6e00 EFLAGS: 00010283
RAX: ffffffff84044745 RBX: ffffc9000d4c6ec0 RCX: 0000000000100000
RDX: ffffc9000e6d3000 RSI: 0000000000008d4b RDI: 0000000000008d4c
RBP: ffffc9000d4c6fa0 R08: ffff88801fc24293 R09: 1ffff11003f84852
R10: dffffc0000000000 R11: ffffed1003f84853 R12: dffffc0000000000
R13: 1ffff92001a98dd4 R14: 1ffff11007d79015 R15: 0000000000000004
FS:  00007f102f2cc6c0(0000) GS:ffff88808d306000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dde305cc10 CR3: 0000000011589000 CR4: 0000000000352ef0