slab gfs2_quotad start ffff888030e6f000 pointer offset 120 size 272
list_add corruption. prev->next should be next (ffff88801ceb6800), but was ffff888030e6f078. (prev=ffff888030e6f078).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:34!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 0 PID: 18034 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__list_add_valid_or_report+0x123/0x130 lib/list_debug.c:32
Code: e8 e2 75 6d fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 13 56 8f fd 49 8b 16 48 c7 c7 40 86 c0 8b 48 89 de 4c 89 f1 e8 2e e6 8f 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:ffffc90003417958 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffff88801ceb6800 RCX: 971f42da94bacf00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 1ffff110039d6d01 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bbae40 R12: 1ffff110061cde0f
R13: dffffc0000000000 R14: ffff888030e6f078 R15: ffff888030e6f078
FS:  0000555568f6c500(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffee7ad6db8 CR3: 0000000074dc4000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:96 [inline]
 __list_add include/linux/list.h:158 [inline]
 list_add_tail include/linux/list.h:191 [inline]
 list_lru_add+0xf2/0x270 mm/list_lru.c:171
 qd_put+0x114/0x190 fs/gfs2/quota.c:342
 do_qc+0x488/0x5e0 fs/gfs2/quota.c:719
 do_sync+0x88d/0xc60 fs/gfs2/quota.c:966
 gfs2_quota_sync+0x359/0x460 fs/gfs2/quota.c:1357
 gfs2_sync_fs+0x4c/0xb0 fs/gfs2/super.c:658
 sync_filesystem+0xee/0x230 fs/sync.c:56
 generic_shutdown_super+0x6f/0x2c0 fs/super.c:622
 kill_block_super+0x44/0x90 fs/super.c:1722
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318
 task_work_run+0x1d4/0x260 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
 exit_to_user_mode_loop+0xef/0x4e0 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2c1/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fad27390a77
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:00007fff107d1fb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fad27413d7d RCX: 00007fad27390a77
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff107d2070
RBP: 00007fff107d2070 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff107d3100
R13: 00007fad27413d7d R14: 000000000023d89f R15: 00007fff107d3140
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0x123/0x130 lib/list_debug.c:32
Code: e8 e2 75 6d fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 13 56 8f fd 49 8b 16 48 c7 c7 40 86 c0 8b 48 89 de 4c 89 f1 e8 2e e6 8f 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:ffffc90003417958 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffff88801ceb6800 RCX: 971f42da94bacf00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 1ffff110039d6d01 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bbae40 R12: 1ffff110061cde0f
R13: dffffc0000000000 R14: ffff888030e6f078 R15: ffff888030e6f078
FS:  0000555568f6c500(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffee7ad6db8 CR3: 0000000074dc4000 CR4: 0000000000350ef0