gfs2: fsid=syz:syz.0: fatal: invalid metadata block
  bh = 2075 (magic number)
  function = gfs2_meta_indirect_buffer, file = fs/gfs2/meta_io.c, line = 488
gfs2: fsid=syz:syz.0: about to withdraw this file system
general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 0 PID: 28192 Comm: syz-executor.2 Not tainted 5.10.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:signal_our_withdraw fs/gfs2/util.c:97 [inline]
RIP: 0010:gfs2_withdraw+0x2d6/0x13c0 fs/gfs2/util.c:294
Code: c1 e8 03 48 89 44 24 28 80 3c 18 00 74 08 48 89 ef e8 6e 34 5d fe 48 89 6c 24 20 48 8b 6d 00 48 83 c5 70 48 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 48 89 ef e8 4c 34 5d fe 48 8b 45 00 48 89 44 24
RSP: 0018:ffffc90016e37488 EFLAGS: 00010202
RAX: 000000000000000e RBX: dffffc0000000000 RCX: dba1f6a8c9610800
RDX: ffff888016e79a40 RSI: 0000000000000000 RDI: ffff88806eda0488
RBP: 0000000000000070 R08: ffffffff8359e9e3 R09: ffffed1017386068
R10: ffffed1017386068 R11: 0000000000000000 R12: ffffffff89fde320
R13: ffff88806eda00a8 R14: 1ffff1100ddb4058 R15: ffff88806eda0000
FS:  00007f65995d5700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000074b698 CR3: 000000002efa0000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 gfs2_meta_check_ii+0x70/0x80 fs/gfs2/util.c:450
 gfs2_metatype_check_i fs/gfs2/util.h:126 [inline]
 gfs2_meta_indirect_buffer+0x29a/0x370 fs/gfs2/meta_io.c:488
 gfs2_meta_inode_buffer fs/gfs2/meta_io.h:70 [inline]
 gfs2_inode_refresh+0x65/0xc30 fs/gfs2/glops.c:478
 inode_go_lock+0x12c/0x480 fs/gfs2/glops.c:508
 do_promote+0x4db/0xcb0 fs/gfs2/glock.c:395
 finish_xmote+0x88d/0x12d0 fs/gfs2/glock.c:562
 do_xmote+0xad9/0x14c0 fs/gfs2/glock.c:688
 gfs2_glock_nq+0xbd3/0x16a0 fs/gfs2/glock.c:1414
 gfs2_glock_nq_init fs/gfs2/glock.h:238 [inline]
 gfs2_lookupi+0x36f/0x4f0 fs/gfs2/inode.c:318
 gfs2_lookup_simple+0xa4/0x100 fs/gfs2/inode.c:269
 init_journal+0xff/0x2110 fs/gfs2/ops_fstype.c:714
 init_inodes fs/gfs2/ops_fstype.c:857 [inline]
 gfs2_fill_super+0x2725/0x3db0 fs/gfs2/ops_fstype.c:1184
 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1344
 gfs2_get_tree+0x4c/0x1f0 fs/gfs2/ops_fstype.c:1260
 vfs_get_tree+0x88/0x270 fs/super.c:1549
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x17b4/0x2a20 fs/namespace.c:3205
 do_mount fs/namespace.c:3218 [inline]
 __do_sys_mount fs/namespace.c:3426 [inline]
 __se_sys_mount+0x28c/0x320 fs/namespace.c:3403
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4608ca
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f65995d4a78 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f65995d4b10 RCX: 00000000004608ca
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f65995d4ad0
RBP: 00007f65995d4ad0 R08: 00007f65995d4b10 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020047a20
Modules linked in:
---[ end trace 4de3358490b24934 ]---
RIP: 0010:signal_our_withdraw fs/gfs2/util.c:97 [inline]
RIP: 0010:gfs2_withdraw+0x2d6/0x13c0 fs/gfs2/util.c:294
Code: c1 e8 03 48 89 44 24 28 80 3c 18 00 74 08 48 89 ef e8 6e 34 5d fe 48 89 6c 24 20 48 8b 6d 00 48 83 c5 70 48 89 e8 48 c1 e8 03 <80> 3c 18 00 74 08 48 89 ef e8 4c 34 5d fe 48 8b 45 00 48 89 44 24
RSP: 0018:ffffc90016e37488 EFLAGS: 00010202
RAX: 000000000000000e RBX: dffffc0000000000 RCX: dba1f6a8c9610800
RDX: ffff888016e79a40 RSI: 0000000000000000 RDI: ffff88806eda0488
RBP: 0000000000000070 R08: ffffffff8359e9e3 R09: ffffed1017386068
R10: ffffed1017386068 R11: 0000000000000000 R12: ffffffff89fde320
R13: ffff88806eda00a8 R14: 1ffff1100ddb4058 R15: ffff88806eda0000
FS:  00007f65995d5700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555ed3a9c160 CR3: 000000002efa0000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400