syzbot

gfs2: fsid=syz:syz.0: G:  s:EX n:8/1 f:qb t:EX d:EX/0 a:0 v:0 r:8 m:20 p:0
gfs2: fsid=syz:syz.0:  H: s:EX f:cH e:0 p:5878 [syz-executor] gfs2_quota_sync+0x411/0x5a0 fs/gfs2/quota.c:1344
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kernel BUG at fs/gfs2/glock.c:1587!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5878 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:add_to_queue fs/gfs2/glock.c:1587 [inline]
RIP: 0010:gfs2_glock_nq+0x113b/0x1420 fs/gfs2/glock.c:1612
Code: 7b 42 36 fe 41 0f b7 0e 48 c7 c7 c0 a5 0f 8b 4c 89 e6 89 da e8 06 94 cf 06 31 ff 48 8b 74 24 08 ba 01 00 00 00 e8 b5 70 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:ffffc900033679f8 EFLAGS: 00010246
RAX: 022dc30304855c00 RBX: 0000000000000008 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: fffff5200066cf34
RBP: ffff88805f046920 R08: ffffffff8e8ad9ef R09: 0000000000000000
R10: fffff5200066cef0 R11: fffffbfff1d15b3e R12: ffff8880258a9280
R13: ffff888023f2ec18 R14: ffff888023f2ec5a R15: ffff888023f2ec22
FS:  00005555693fa500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555569415a28 CR3: 000000002bc8a000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 gfs2_glock_nq_init fs/gfs2/glock.h:252 [inline]
 do_sync+0x407/0xe50 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+0x43b/0x4d0 fs/namespace.c:1259
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 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+0xee/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+0x61/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2437d9bf17
Code: a2 c7 05 7c 96 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd630850e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f2437e0471f RCX: 00007f2437d9bf17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd630851a0
RBP: 00007ffd630851a0 R08: 00007ffd630861a0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd63086230
R13: 00007f2437e0471f R14: 000000000001434c R15: 00007ffd63086270
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:add_to_queue fs/gfs2/glock.c:1587 [inline]
RIP: 0010:gfs2_glock_nq+0x113b/0x1420 fs/gfs2/glock.c:1612
Code: 7b 42 36 fe 41 0f b7 0e 48 c7 c7 c0 a5 0f 8b 4c 89 e6 89 da e8 06 94 cf 06 31 ff 48 8b 74 24 08 ba 01 00 00 00 e8 b5 70 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:ffffc900033679f8 EFLAGS: 00010246
RAX: 022dc30304855c00 RBX: 0000000000000008 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: fffff5200066cf34
RBP: ffff88805f046920 R08: ffffffff8e8ad9ef R09: 0000000000000000
R10: fffff5200066cef0 R11: fffffbfff1d15b3e R12: ffff8880258a9280
R13: ffff888023f2ec18 R14: ffff888023f2ec5a R15: ffff888023f2ec22
FS:  00005555693fa500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555569415a28 CR3: 000000002bc8a000 CR4: 00000000003506e0