gfs2: fsid=syz:syz.0: first mount done, others may mount
gfs2: fsid=syz:syz.0: found 1 quota changes
 slab gfs2_quotad start ffff888056827000 pointer offset 120 size 272
list_add corruption. prev->next should be next (ffff88801b69c200), but was ffff888056827078. (prev=ffff888056827078).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:34!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 26134 Comm: syz.3.4190 Not tainted 6.15.0-rc4-syzkaller-00296-ge8ab83e34bdc #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
RIP: 0010:__list_add_valid_or_report+0x123/0x130 lib/list_debug.c:32
Code: e8 a2 7d 43 fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 c3 4d 63 fd 49 8b 16 48 c7 c7 60 d4 c1 8b 48 89 de 4c 89 f1 e8 ee 29 69 fc 90 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90005377ad8 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffff88801b69c200 RCX: c962f8be0d786b00
RDX: ffffc9001433a000 RSI: 000000000000c86e RDI: 000000000000c86f
RBP: 1ffff110036d3841 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba4b4 R12: 1ffff1100ad04e0f
R13: dffffc0000000000 R14: ffff888056827078 R15: ffff888056827078
FS:  00007f36eb1296c0(0000) GS:ffff8881260cb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d31fffc CR3: 000000002832e000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:88 [inline]
 __list_add include/linux/list.h:150 [inline]
 list_add_tail include/linux/list.h:183 [inline]
 list_lru_add+0xf2/0x270 mm/list_lru.c:167
 qd_put+0x114/0x190 fs/gfs2/quota.c:342
 gfs2_quota_sync+0x3c4/0x460 fs/gfs2/quota.c:1361
 gfs2_sync_fs+0x4c/0xb0 fs/gfs2/super.c:670
 sync_filesystem+0xee/0x230 fs/sync.c:56
 gfs2_reconfigure+0xbb/0xb20 fs/gfs2/ops_fstype.c:1550
 reconfigure_super+0x227/0x890 fs/super.c:1083
 do_remount fs/namespace.c:3368 [inline]
 path_mount+0xd18/0xfe0 fs/namespace.c:4203
 do_mount fs/namespace.c:4224 [inline]
 __do_sys_mount fs/namespace.c:4435 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4412
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f36ea38e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f36eb129038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f36ea5b5fa0 RCX: 00007f36ea38e969
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007f36ea410ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000003376039 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f36ea5b5fa0 R15: 00007ffeac704908
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0x123/0x130 lib/list_debug.c:32
Code: e8 a2 7d 43 fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 c3 4d 63 fd 49 8b 16 48 c7 c7 60 d4 c1 8b 48 89 de 4c 89 f1 e8 ee 29 69 fc 90 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90005377ad8 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffff88801b69c200 RCX: c962f8be0d786b00
RDX: ffffc9001433a000 RSI: 000000000000c86e RDI: 000000000000c86f
RBP: 1ffff110036d3841 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bba4b4 R12: 1ffff1100ad04e0f
R13: dffffc0000000000 R14: ffff888056827078 R15: ffff888056827078
FS:  00007f36eb1296c0(0000) GS:ffff8881260cb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d31fffc CR3: 000000002832e000 CR4: 0000000000350ef0