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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 ffff88805d533728 by task xfsaild/loop4/9430

CPU: 1 UID: 0 PID: 9430 Comm: xfsaild/loop4 Tainted: G        W           6.16.0-syzkaller-11952-g6e64f4580381 #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 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+0xd9b/0x2950 fs/xfs/xfs_trans_ail.c:700
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 9403:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:330 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4180 [inline]
 slab_alloc_node mm/slub.c:4229 [inline]
 kmem_cache_alloc_noprof+0x143/0x310 mm/slub.c:4236
 xfs_inode_item_init+0x33/0xd0 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_create+0x627/0xad0 fs/xfs/xfs_inode.c:721
 xfs_generic_create+0x3cc/0xad0 fs/xfs/xfs_iops.c:216
 lookup_open fs/namei.c:3708 [inline]
 open_last_lookups fs/namei.c:3807 [inline]
 path_openat+0x14fd/0x3840 fs/namei.c:4043
 do_filp_open+0x1fa/0x410 fs/namei.c:4073
 do_sys_openat2+0x121/0x1c0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_creat fs/open.c:1528 [inline]
 __se_sys_creat fs/open.c:1522 [inline]
 __x64_sys_creat+0x8f/0xc0 fs/open.c:1522
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 28:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:243 [inline]
 __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:275
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2417 [inline]
 slab_free mm/slub.c:4680 [inline]
 kmem_cache_free+0x195/0x510 mm/slub.c:4782
 xfs_inode_free_callback+0x14f/0x1c0 fs/xfs/xfs_icache.c:161
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core kernel/rcu/tree.c:2861 [inline]
 rcu_cpu_kthread+0xbf6/0x1b50 kernel/rcu/tree.c:2949
 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff88805d5336f8
 which belongs to the cache xfs_ili of size 328
The buggy address is located 48 bytes inside of
 freed 328-byte region [ffff88805d5336f8, ffff88805d533840)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805d532188 pfn:0x5d532
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88801ff9b640 dead000000000122 0000000000000000
raw: ffff88805d532188 000000008014000b 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88801ff9b640 dead000000000122 0000000000000000
head: ffff88805d532188 000000008014000b 00000000f5000000 0000000000000000
head: 0080000000000001 ffffea0001754c81 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000002
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7138, tgid 7135 (syz.3.230), ts 187734995712, free_ts 154480748013
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851
 prep_new_page mm/page_alloc.c:1859 [inline]
 get_page_from_freelist+0x2119/0x21b0 mm/page_alloc.c:3858
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148
 alloc_pages_mpol+0xd1/0x380 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:2487 [inline]
 allocate_slab+0x8a/0x370 mm/slub.c:2655
 new_slab mm/slub.c:2709 [inline]
 ___slab_alloc+0x8d1/0xdd0 mm/slub.c:3891
 __slab_alloc mm/slub.c:3981 [inline]
 __slab_alloc_node mm/slub.c:4056 [inline]
 slab_alloc_node mm/slub.c:4217 [inline]
 kmem_cache_alloc_noprof+0xe6/0x310 mm/slub.c:4236
 xfs_inode_item_init+0x33/0xd0 fs/xfs/xfs_inode_item.c:895
 xfs_trans_ijoin+0xe5/0x130 fs/xfs/libxfs/xfs_trans_inode.c:36
 xfs_vn_update_time+0x377/0x570 fs/xfs/xfs_iops.c:1225
 inode_update_time fs/inode.c:2075 [inline]
 __file_update_time fs/inode.c:2304 [inline]
 file_modified_flags+0x3fa/0x560 fs/inode.c:2375
 xfs_file_write_checks+0x997/0xa20 fs/xfs/xfs_file.c:495
 xfs_file_dio_write_aligned+0xd3/0x1b0 fs/xfs/xfs_file.c:689
 xfs_file_dio_write fs/xfs/xfs_file.c:914 [inline]
 xfs_file_write_iter+0x8b8/0xa60 fs/xfs/xfs_file.c:1126
 iter_file_splice_write+0x93c/0x1000 fs/splice.c:738
 do_splice_from fs/splice.c:935 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1158
page last free pid 5852 tgid 5852 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0xb59/0xce0 mm/page_alloc.c:2895
 free_large_kmalloc+0x13a/0x1f0 mm/slub.c:4805
 __btree_node_data_free+0x2bb/0x3a0 fs/bcachefs/btree_cache.c:107
 btree_node_data_free+0x13f/0x340 fs/bcachefs/btree_cache.c:122
 bch2_fs_btree_cache_exit+0x9c1/0x13c0 fs/bcachefs/btree_cache.c:609
 __bch2_fs_free fs/bcachefs/super.c:619 [inline]
 bch2_fs_release+0x2bb/0x830 fs/bcachefs/super.c:667
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x22b/0x480 lib/kobject.c:737
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1378
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88805d533600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805d533680: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa
>ffff88805d533700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88805d533780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805d533800: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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