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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 ffff88804aa96340 by task xfsaild/loop6/8520

CPU: 0 UID: 0 PID: 8520 Comm: xfsaild/loop6 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 8479:
 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:4191 [inline]
 slab_alloc_node mm/slub.c:4240 [inline]
 kmem_cache_alloc_noprof+0x143/0x310 mm/slub.c:4247
 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_trans_alloc_ichange+0x200/0x6e0 fs/xfs/xfs_trans.c:1252
 xfs_setattr_nonsize+0x402/0xcb0 fs/xfs/xfs_iops.c:839
 xfs_vn_setattr+0x28f/0x300 fs/xfs/xfs_iops.c:1180
 notify_change+0xb34/0xe60 fs/attr.c:552
 chown_common+0x40c/0x5c0 fs/open.c:791
 vfs_fchown fs/open.c:859 [inline]
 ksys_fchown+0xea/0x160 fs/open.c:871
 __do_sys_fchown fs/open.c:876 [inline]
 __se_sys_fchown fs/open.c:874 [inline]
 __x64_sys_fchown+0x7a/0x90 fs/open.c:874
 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 20:
 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:2422 [inline]
 slab_free mm/slub.c:4695 [inline]
 kmem_cache_free+0x195/0x510 mm/slub.c:4797
 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+0xbf3/0x1b50 kernel/rcu/tree.c:2949
 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:160
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 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 ffff88804aa96310
 which belongs to the cache xfs_ili of size 328
The buggy address is located 48 bytes inside of
 freed 328-byte region [ffff88804aa96310, ffff88804aa96458)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88804aa96498 pfn:0x4aa96
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 ffff88801f359280 dead000000000122 0000000000000000
raw: ffff88804aa96498 0000000080140011 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88801f359280 dead000000000122 0000000000000000
head: ffff88804aa96498 0000000080140011 00000000f5000000 0000000000000000
head: 0080000000000001 ffffea00012aa581 00000000ffffffff 00000000ffffffff
head: 00000007f3184282 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 5979, tgid 5978 (syz.0.8), ts 104473774401, free_ts 82949649570
 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:2492 [inline]
 allocate_slab+0x8a/0x370 mm/slub.c:2660
 new_slab mm/slub.c:2714 [inline]
 ___slab_alloc+0x8d1/0xdc0 mm/slub.c:3901
 __slab_alloc mm/slub.c:3992 [inline]
 __slab_alloc_node mm/slub.c:4067 [inline]
 slab_alloc_node mm/slub.c:4228 [inline]
 kmem_cache_alloc_noprof+0xe6/0x310 mm/slub.c:4247
 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+0x1500/0x3840 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
page last free pid 5826 tgid 5826 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 free_unref_folios+0xd66/0x1460 mm/page_alloc.c:2952
 folios_put_refs+0x569/0x670 mm/swap.c:997
 free_pages_and_swap_cache+0x277/0x520 mm/swap_state.c:264
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:397 [inline]
 tlb_flush_mmu+0x3a0/0x680 mm/mmu_gather.c:404
 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:497
 vms_clear_ptes+0x42c/0x540 mm/vma.c:1235
 vms_complete_munmap_vmas+0x206/0x8a0 mm/vma.c:1277
 do_vmi_align_munmap+0x369/0x440 mm/vma.c:1536
 do_vmi_munmap+0x253/0x2e0 mm/vma.c:1584
 __vm_munmap+0x23b/0x3d0 mm/vma.c:3155
 __do_sys_munmap mm/mmap.c:1080 [inline]
 __se_sys_munmap mm/mmap.c:1077 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:1077
 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

Memory state around the buggy address:
 ffff88804aa96200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88804aa96280: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc
>ffff88804aa96300: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff88804aa96380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88804aa96400: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
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