================================================================== BUG: KASAN: slab-use-after-free in xfs_inode_item_push+0x3c3/0x6d0 fs/xfs/xfs_inode_item.c:800 Read of size 8 at addr ffff8880569e0550 by task xfsaild/loop5/10969 CPU: 0 UID: 0 PID: 10969 Comm: xfsaild/loop5 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 xfs_inode_item_push+0x3c3/0x6d0 fs/xfs/xfs_inode_item.c:800 xfsaild_push_item fs/xfs/xfs_trans_ail.c:390 [inline] xfsaild_push fs/xfs/xfs_trans_ail.c:518 [inline] xfsaild+0xd95/0x2940 fs/xfs/xfs_trans_ail.c:700 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 10954: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:339 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:365 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4770 [inline] slab_alloc_node mm/slub.c:5068 [inline] kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5075 xfs_inode_item_init+0x33/0xc0 fs/xfs/xfs_inode_item.c:895 xfs_trans_ijoin+0xe5/0x130 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_icreate+0xe4/0x160 fs/xfs/xfs_inode.c:605 xfs_qm_qino_alloc+0x232/0x6a0 fs/xfs/xfs_qm.c:1010 xfs_qm_init_quotainos+0x73c/0x980 fs/xfs/xfs_qm.c:1822 xfs_qm_init_quotainfo+0x181/0x1160 fs/xfs/xfs_qm.c:836 xfs_qm_mount_quotas+0xa6/0x670 fs/xfs/xfs_qm.c:1676 xfs_mountfs+0x1af2/0x22c0 fs/xfs/xfs_mount.c:1187 xfs_fs_fill_super+0x11b3/0x1600 fs/xfs/xfs_super.c:1924 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1691 vfs_get_tree+0x92/0x2b0 fs/super.c:1751 fc_mount fs/namespace.c:1274 [inline] do_new_mount_fc fs/namespace.c:3726 [inline] do_new_mount+0x302/0xa10 fs/namespace.c:3802 do_mount fs/namespace.c:4125 [inline] __do_sys_mount fs/namespace.c:4324 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4301 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 13: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2474 [inline] slab_free mm/slub.c:6181 [inline] kmem_cache_free+0x19a/0x690 mm/slub.c:6292 xfs_inode_free_callback+0x14f/0x1c0 fs/xfs/xfs_icache.c:161 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core+0xcab/0x1770 kernel/rcu/tree.c:2861 handle_softirqs+0x286/0x870 kernel/softirq.c:579 do_softirq+0xec/0x180 kernel/softirq.c:480 __local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:407 spin_unlock_bh include/linux/spinlock.h:396 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:835 [inline] nsim_dev_trap_report_work+0x7c7/0xb80 drivers/net/netdevsim/dev.c:866 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff8880569e0520 which belongs to the cache xfs_ili of size 264 The buggy address is located 48 bytes inside of freed 264-byte region [ffff8880569e0520, ffff8880569e0628) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x569e0 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff8881476978c0 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x52c50(GFP_NOFS|__GFP_RECLAIMABLE|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 6431, tgid 6430 (syz.4.78), ts 114598714466, free_ts 98532164782 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3869 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5159 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:2986 [inline] allocate_slab+0x8a/0x330 mm/slub.c:3154 new_slab mm/slub.c:3208 [inline] ___slab_alloc+0xbd1/0x13f0 mm/slub.c:4480 __slab_alloc+0x55/0xa0 mm/slub.c:4571 __slab_alloc_node mm/slub.c:4646 [inline] slab_alloc_node mm/slub.c:5056 [inline] kmem_cache_alloc_noprof+0x3f9/0x6e0 mm/slub.c:5075 xfs_inode_item_init+0x33/0xc0 fs/xfs/xfs_inode_item.c:895 xfs_trans_ijoin+0xe5/0x130 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_icreate+0xe4/0x160 fs/xfs/xfs_inode.c:605 xfs_qm_qino_alloc+0x232/0x6a0 fs/xfs/xfs_qm.c:1010 xfs_qm_init_quotainos+0x73c/0x980 fs/xfs/xfs_qm.c:1822 xfs_qm_init_quotainfo+0x181/0x1160 fs/xfs/xfs_qm.c:836 xfs_qm_mount_quotas+0xa6/0x670 fs/xfs/xfs_qm.c:1676 xfs_mountfs+0x1af2/0x22c0 fs/xfs/xfs_mount.c:1187 page last free pid 5230 tgid 5230 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2906 discard_slab mm/slub.c:3252 [inline] __put_partials+0x146/0x170 mm/slub.c:3715 put_cpu_partial+0x17c/0x250 mm/slub.c:3790 __slab_free+0x2b9/0x390 mm/slub.c:5615 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:349 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4770 [inline] slab_alloc_node mm/slub.c:5068 [inline] __kmalloc_cache_noprof+0x36f/0x6f0 mm/slub.c:5452 kmalloc_noprof include/linux/slab.h:956 [inline] kzalloc_noprof include/linux/slab.h:1090 [inline] kernfs_fop_open+0x397/0xca0 fs/kernfs/file.c:641 do_dentry_open+0x953/0x13f0 fs/open.c:965 vfs_open+0x3b/0x340 fs/open.c:1095 do_open fs/namei.c:3895 [inline] path_openat+0x2ee5/0x3830 fs/namei.c:4054 do_filp_open+0x1fa/0x410 fs/namei.c:4081 do_sys_openat2+0x121/0x1c0 fs/open.c:1435 do_sys_open fs/open.c:1450 [inline] __do_sys_openat fs/open.c:1466 [inline] __se_sys_openat fs/open.c:1461 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1461 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 Memory state around the buggy address: ffff8880569e0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880569e0480: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff8880569e0500: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880569e0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880569e0600: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb ==================================================================