syzbot

gfs2: fsid=syz:syz.0: lock type: 8 req lock state : 1
gfs2: fsid=syz:syz.0: new: gfs2_glock_nq_init fs/gfs2/glock.h:244 [inline]
gfs2: fsid=syz:syz.0: new: do_sync+0x3b0/0xc00 fs/gfs2/quota.c:921
gfs2: fsid=syz:syz.0: pid: 4325
gfs2: fsid=syz:syz.0: lock type: 8 req lock state : 1
gfs2: fsid=syz:syz.0: G:  s:EX n:8/1 f:qb t:EX d:EX/0 a:0 v:0 r:5 m:20 p:0
gfs2: fsid=syz:syz.0:  H: s:EX f:cH e:0 p:4325 [syz-executor] gfs2_glock_nq_init fs/gfs2/glock.h:244 [inline]
gfs2: fsid=syz:syz.0:  H: s:EX f:cH e:0 p:4325 [syz-executor] do_sync+0x3b0/0xc00 fs/gfs2/quota.c:921
------------[ cut here ]------------
kernel BUG at fs/gfs2/glock.c:1503!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4325 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:1503 [inline]
RIP: 0010:gfs2_glock_nq+0x1011/0x1550 fs/gfs2/glock.c:1527
Code: b5 f1 57 fe 89 da 41 0f b7 0f 48 c7 c7 40 8f 4d 8a 4c 89 ee e8 10 2c 33 06 31 ff 48 8b 74 24 08 ba 01 00 00 00 e8 bf 8b ff ff <0f> 0b e8 08 89 13 fe e8 d3 37 9c fd e9 14 fa ff ff 4c 8d 7b 08 4d
RSP: 0018:ffffc900031bfa60 EFLAGS: 00010246
RAX: 5d2d6d2f293e8600 RBX: ffff88805b4adc38 RCX: ffff88801d39bb80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ad26b6
R10: fffffbfff1ad26b6 R11: 1ffffffff1ad26b5 R12: dffffc0000000000
R13: ffff88807b8ad2c0 R14: ffff888073c3c550 R15: ffff888073c3c55a
FS:  0000555590a35500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555590a505c8 CR3: 0000000029a9b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 gfs2_glock_nq_init fs/gfs2/glock.h:246 [inline]
 do_sync+0x3b8/0xc00 fs/gfs2/quota.c:921
 gfs2_quota_sync+0x32c/0x6f0 fs/gfs2/quota.c:1329
 gfs2_sync_fs+0x48/0xb0 fs/gfs2/super.c:647
 sync_filesystem+0xe6/0x220 fs/sync.c:56
 generic_shutdown_super+0x6b/0x300 fs/super.c:448
 kill_block_super+0x7c/0xe0 fs/super.c:1427
 deactivate_locked_super+0x93/0xf0 fs/super.c:335
 cleanup_mnt+0x418/0x4d0 fs/namespace.c:1148
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f6056e24a77
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:00007ffeae55fa68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f6056ea7d7d RCX: 00007f6056e24a77
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffeae55fb20
RBP: 00007ffeae55fb20 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffeae560bb0
R13: 00007f6056ea7d7d R14: 0000000000011b10 R15: 00007ffeae560bf0
 </TASK>
Modules linked in:
---[ end trace c2f1db0242d3dc25 ]---
RIP: 0010:add_to_queue fs/gfs2/glock.c:1503 [inline]
RIP: 0010:gfs2_glock_nq+0x1011/0x1550 fs/gfs2/glock.c:1527
Code: b5 f1 57 fe 89 da 41 0f b7 0f 48 c7 c7 40 8f 4d 8a 4c 89 ee e8 10 2c 33 06 31 ff 48 8b 74 24 08 ba 01 00 00 00 e8 bf 8b ff ff <0f> 0b e8 08 89 13 fe e8 d3 37 9c fd e9 14 fa ff ff 4c 8d 7b 08 4d
RSP: 0018:ffffc900031bfa60 EFLAGS: 00010246
RAX: 5d2d6d2f293e8600 RBX: ffff88805b4adc38 RCX: ffff88801d39bb80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc000000