syzbot

gfs2: fsid=$.]^(i_$.0: lock type: 8 req lock state : 1
gfs2: fsid=$.]^(i_$.0: G:  s:EX n:8/1 f:qb t:EX d:EX/0 a:0 v:0 r:7 m:20 p:0
gfs2: fsid=$.]^(i_$.0:  H: s:EX f:cH e:0 p:5904 [syz-executor] gfs2_quota_sync+0x411/0x5a0 fs/gfs2/quota.c:1344
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kernel BUG at fs/gfs2/glock.c:1589!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5904 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:add_to_queue fs/gfs2/glock.c:1589 [inline]
RIP: 0010:gfs2_glock_nq+0x113b/0x1420 fs/gfs2/glock.c:1614
Code: 2b c2 3c fe 41 0f b7 0e 48 c7 c7 00 8f ef 8a 4c 89 e6 89 da e8 16 eb c2 06 31 ff 48 8b 74 24 08 ba 01 00 00 00 e8 35 74 ff ff <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 45 f1 ff ff 4c 89 f7
RSP: 0018:ffffc900030579f8 EFLAGS: 00010246
RAX: a12cd7c2159a2400 RBX: 0000000000000008 RCX: ffff888026758000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888060d55ca0 R08: ffffffff8e4a836f R09: 1ffffffff1c9506d
R10: dffffc0000000000 R11: fffffbfff1c9506e R12: ffff8880643dd280
R13: ffff888077423c18 R14: ffff888077423c5a R15: ffff888077423c22
FS:  000055555bc4e500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555bc695c8 CR3: 000000002d52e000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 gfs2_glock_nq_init fs/gfs2/glock.h:252 [inline]
 do_sync+0x3c1/0xe00 fs/gfs2/quota.c:912
 gfs2_quota_sync+0x411/0x5a0 fs/gfs2/quota.c:1344
 gfs2_sync_fs+0x4c/0xb0 fs/gfs2/super.c:670
 sync_filesystem+0xea/0x220 fs/sync.c:56
 generic_shutdown_super+0x6f/0x2b0 fs/super.c:666
 kill_block_super+0x44/0x90 fs/super.c:1660
 deactivate_locked_super+0x97/0x100 fs/super.c:481
 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1250
 task_work_run+0x1ce/0x250 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7febd77901f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffc8461da88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007febd7811d7d RCX: 00007febd77901f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc8461db40
RBP: 00007ffc8461db40 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc8461ebd0
R13: 00007febd7811d7d R14: 0000000000019694 R15: 00007ffc8461ec10
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:add_to_queue fs/gfs2/glock.c:1589 [inline]
RIP: 0010:gfs2_glock_nq+0x113b/0x1420 fs/gfs2/glock.c:1614
Code: 2b c2 3c fe 41 0f b7 0e 48 c7 c7 00 8f ef 8a 4c 89 e6 89 da e8 16 eb c2 06 31 ff 48 8b 74 24 08 ba 01 00 00 00 e8 35 74 ff ff <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 45 f1 ff ff 4c 89 f7
RSP: 0018:ffffc900030579f8 EFLAGS: 00010246
RAX: a12cd7c2159a2400 RBX: 0000000000000008 RCX: ffff888026758000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888060d55ca0 R08: ffffffff8e4a836f R09: 1ffffffff1c9506d
R10: dffffc0000000000 R11: fffffbfff1c9506e R12: ffff8880643dd280
R13: ffff888077423c18 R14: ffff888077423c5a R15: ffff888077423c22
FS:  000055555bc4e500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555bc695c8 CR3: 000000002d52e000 CR4: 00000000003506e0