slab gfs2_quotad start ffff88804ff67000 pointer offset 120 size 272 list_add corruption. prev->next should be next (ffff88801aec1e00), but was ffff88804ff67078. (prev=ffff88804ff67078). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:34! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 5829 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 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 62 4b 6d fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 83 2b 8f fd 49 8b 16 48 c7 c7 40 87 c0 8b 48 89 de 4c 89 f1 e8 2e a3 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:ffffc90003f1f958 EFLAGS: 00010246 RAX: 0000000000000075 RBX: ffff88801aec1e00 RCX: e89658c60a119800 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 1ffff110035d83c1 R08: ffffc90003f1f6e7 R09: 1ffff920007e3edc R10: dffffc0000000000 R11: fffff520007e3edd R12: 1ffff11009fece0f R13: dffffc0000000000 R14: ffff88804ff67078 R15: ffff88804ff67078 FS: 000055556cae2500(0000) GS:ffff888125f1b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa139200020 CR3: 000000005a9b1000 CR4: 0000000000350ef0 Call Trace: __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: 0033:0x7f9a8c790a77 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:00007ffd2424d268 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f9a8c813d7d RCX: 00007f9a8c790a77 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd2424d320 RBP: 00007ffd2424d320 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd2424e3b0 R13: 00007f9a8c813d7d R14: 00000000000469bd R15: 00007ffd2424e3f0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_add_valid_or_report+0x123/0x130 lib/list_debug.c:32 Code: e8 62 4b 6d fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 83 2b 8f fd 49 8b 16 48 c7 c7 40 87 c0 8b 48 89 de 4c 89 f1 e8 2e a3 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:ffffc90003f1f958 EFLAGS: 00010246 RAX: 0000000000000075 RBX: ffff88801aec1e00 RCX: e89658c60a119800 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 1ffff110035d83c1 R08: ffffc90003f1f6e7 R09: 1ffff920007e3edc R10: dffffc0000000000 R11: fffff520007e3edd R12: 1ffff11009fece0f R13: dffffc0000000000 R14: ffff88804ff67078 R15: ffff88804ff67078 FS: 000055556cae2500(0000) GS:ffff888125f1b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa139200020 CR3: 000000005a9b1000 CR4: 0000000000350ef0