[v6.6] kernel BUG in gfs2_withdraw (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: c09fbcd31ae6 Linux 6.6.130
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=165930f2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=c5b35c4db8465904
dashboard link: https://syzkaller.appspot.com/bug?extid=8623802f4fb0eb61f2cf
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15de946a580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=115930f2580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/58165bbf9941/disk-c09fbcd3.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/73cbb84fb36b/vmlinux-c09fbcd3.xz
kernel image: https://storage.googleapis.com/syzbot-assets/744ea33ec44b/bzImage-c09fbcd3.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/c6abcc736865/mount_0.gz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=125930f2580000)

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+862380...@syzkaller.appspotmail.com

bh = 2073 (magic number)
function = gfs2_meta_buffer, file = fs/gfs2/meta_io.c, line = 503
gfs2: fsid=#���S��^Ѱ �~ o�� $� .s: about to withdraw this file system
------------[ cut here ]------------
kernel BUG at fs/gfs2/util.c:331!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5917 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:gfs2_withdraw+0x132c/0x13d0 fs/gfs2/util.c:331
Code: ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 5b fb ff ff 4c 89 ff 49 89 f6 e8 b1 ef 2d fe 4c 89 f6 e9 48 fb ff ff e8 b4 b3 d5 fd <0f> 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c a2 fb ff ff 4c 89 ff
RSP: 0018:ffffc900046cf320 EFLAGS: 00010293
RAX: ffffffff83b16c6c RBX: ffff888024938340 RCX: ffff888025ed5a00
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: ffffc900046cf4b8 R08: ffffc900046cf027 R09: 1ffff920008d9e04
R10: dffffc0000000000 R11: fffff520008d9e05 R12: ffff888024938000
R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff11004927015
FS: 000055555c4a7500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff816c4b53c CR3: 000000007c122000 CR4: 00000000003506f0
Call Trace:
<TASK>
gfs2_meta_check_ii+0x72/0x90 fs/gfs2/util.c:490
gfs2_metatype_check_i fs/gfs2/util.h:126 [inline]
gfs2_meta_buffer+0x236/0x310 fs/gfs2/meta_io.c:503
gfs2_meta_inode_buffer fs/gfs2/meta_io.h:72 [inline]
gfs2_inode_refresh+0xc1/0x1000 fs/gfs2/glops.c:488
gfs2_instantiate+0x162/0x220 fs/gfs2/glock.c:483
gfs2_glock_holder_ready fs/gfs2/glock.c:1362 [inline]
gfs2_glock_wait+0x1d4/0x2a0 fs/gfs2/glock.c:1382
gfs2_glock_nq_init fs/gfs2/glock.h:253 [inline]
gfs2_lookupi+0x3de/0x640 fs/gfs2/inode.c:328
gfs2_lookup_meta+0xb0/0x180 fs/gfs2/inode.c:279
init_journal+0x1c2/0x2330 fs/gfs2/ops_fstype.c:743
init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:886
gfs2_fill_super+0x17bc/0x1f30 fs/gfs2/ops_fstype.c:1266
get_tree_bdev+0x3f3/0x520 fs/super.c:1591
gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1344
vfs_get_tree+0x8c/0x280 fs/super.c:1764
do_new_mount+0x24b/0xa40 fs/namespace.c:3386
do_mount fs/namespace.c:3726 [inline]
__do_sys_mount fs/namespace.c:3935 [inline]
__se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff816b9da8a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe0f0f6ad8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffe0f0f6b60 RCX: 00007ff816b9da8a
RDX: 0000200000000400 RSI: 0000200000012500 RDI: 00007ffe0f0f6b20
RBP: 0000200000000400 R08: 00007ffe0f0f6b60 R09: 0000000000200001
R10: 0000000000200001 R11: 0000000000000246 R12: 0000200000012500
R13: 00007ffe0f0f6b20 R14: 0000000000012625 R15: 0000200000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gfs2_withdraw+0x132c/0x13d0 fs/gfs2/util.c:331
Code: ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 5b fb ff ff 4c 89 ff 49 89 f6 e8 b1 ef 2d fe 4c 89 f6 e9 48 fb ff ff e8 b4 b3 d5 fd <0f> 0b 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c a2 fb ff ff 4c 89 ff
RSP: 0018:ffffc900046cf320 EFLAGS: 00010293
RAX: ffffffff83b16c6c RBX: ffff888024938340 RCX: ffff888025ed5a00
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: ffffc900046cf4b8 R08: ffffc900046cf027 R09: 1ffff920008d9e04
R10: dffffc0000000000 R11: fffff520008d9e05 R12: ffff888024938000
R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff11004927015
FS: 000055555c4a7500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f476e1b0000 CR3: 000000007c122000 CR4: 00000000003506e0


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