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BUG: KASAN: slab-use-after-free in xfs_inode_item_push+0x396/0x720 fs/xfs/xfs_inode_item.c:798
Read of size 8 at addr ffff88804e105bc0 by task xfsaild/loop2/7063

CPU: 0 UID: 0 PID: 7063 Comm: xfsaild/loop2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xba/0x230 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 xfs_inode_item_push+0x396/0x720 fs/xfs/xfs_inode_item.c:798
 xfsaild_push_item fs/xfs/xfs_trans_ail.c:390 [inline]
 xfsaild_push fs/xfs/xfs_trans_ail.c:518 [inline]
 xfsaild+0x10c6/0x2b00 fs/xfs/xfs_trans_ail.c:700
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 7064:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4542 [inline]
 slab_alloc_node mm/slub.c:4869 [inline]
 kmem_cache_alloc_noprof+0x33b/0x680 mm/slub.c:4876
 xfs_inode_item_init+0x33/0xd0 fs/xfs/xfs_inode_item.c:926
 xfs_trans_ijoin+0xe5/0x130 fs/xfs/libxfs/xfs_trans_inode.c:36
 xfs_vn_update_time+0x378/0x5a0 fs/xfs/xfs_iops.c:1225
 touch_atime+0x2f8/0x6b0 fs/inode.c:2271
 pick_link+0xb5d/0xfe0 fs/namei.c:2046
 step_into_slowpath+0x547/0x7e0 fs/namei.c:2124
 step_into fs/namei.c:2149 [inline]
 walk_component fs/namei.c:2285 [inline]
 lookup_last fs/namei.c:2780 [inline]
 path_lookupat+0x433/0x8c0 fs/namei.c:2804
 filename_lookup+0x256/0x5d0 fs/namei.c:2833
 do_sys_truncate+0xbb/0x1c0 fs/open.c:140
 __do_sys_truncate fs/open.c:154 [inline]
 __se_sys_truncate fs/open.c:152 [inline]
 __x64_sys_truncate+0x5b/0x70 fs/open.c:152
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 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:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2692 [inline]
 slab_free mm/slub.c:6168 [inline]
 kmem_cache_free+0x185/0x6b0 mm/slub.c:6298
 xfs_inode_free_callback+0x14f/0x1c0 fs/xfs/xfs_icache.c:161
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core kernel/rcu/tree.c:2869 [inline]
 rcu_cpu_kthread+0x99e/0x1470 kernel/rcu/tree.c:2957
 smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 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 ffff88804e105b90
 which belongs to the cache xfs_ili of size 328
The buggy address is located 48 bytes inside of
 freed 328-byte region [ffff88804e105b90, ffff88804e105cd8)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88804e104930 pfn:0x4e104
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000240(workingset|head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000240 ffff888140aed000 ffffea0001384190 ffffea0001386d10
raw: ffff88804e104930 0000000800140012 00000000f5000000 0000000000000000
head: 0080000000000240 ffff888140aed000 ffffea0001384190 ffffea0001386d10
head: ffff88804e104930 0000000800140012 00000000f5000000 0000000000000000
head: 0080000000000001 ffffea0001384101 00000000ffffffff 00000000ffffffff
head: 00000007fb74c7b8 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 5914, tgid 5913 (syz.1.6), ts 120792410829, free_ts 105426244576
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889
 prep_new_page mm/page_alloc.c:1897 [inline]
 get_page_from_freelist+0x28bb/0x2950 mm/page_alloc.c:3962
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250
 alloc_slab_page mm/slub.c:3296 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3485
 new_slab mm/slub.c:3543 [inline]
 refill_objects+0x334/0x3c0 mm/slub.c:7178
 __pcs_replace_empty_main+0x371/0x5c0 mm/slub.c:-1
 alloc_from_pcs mm/slub.c:4720 [inline]
 slab_alloc_node mm/slub.c:4854 [inline]
 kmem_cache_alloc_noprof+0x433/0x680 mm/slub.c:4876
 xfs_inode_item_init+0x33/0xd0 fs/xfs/xfs_inode_item.c:926
 xfs_trans_ijoin+0xe5/0x130 fs/xfs/libxfs/xfs_trans_inode.c:36
 xfs_icreate+0xea/0x170 fs/xfs/xfs_inode.c:605
 xfs_qm_qino_alloc+0x266/0x730 fs/xfs/xfs_qm.c:962
 xfs_qm_init_quotainos+0x7bd/0xa00 fs/xfs/xfs_qm.c:1779
 xfs_qm_init_quotainfo+0x17c/0x1270 fs/xfs/xfs_qm.c:788
 xfs_qm_mount_quotas+0xa6/0x670 fs/xfs/xfs_qm.c:1633
 xfs_mountfs+0x1b16/0x22e0 fs/xfs/xfs_mount.c:1189
 xfs_fs_fill_super+0x11b5/0x1600 fs/xfs/xfs_super.c:1938
page last free pid 5785 tgid 5785 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1433 [inline]
 free_unref_folios+0xe7b/0x1c70 mm/page_alloc.c:3040
 folios_put_refs+0x56f/0x680 mm/swap.c:1002
 free_pages_and_swap_cache+0x2e7/0x5b0 mm/swap_state.c:423
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:138 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:151 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:398 [inline]
 tlb_flush_mmu+0x6d3/0xa30 mm/mmu_gather.c:405
 tlb_finish_mmu+0xf9/0x230 mm/mmu_gather.c:530
 unmap_region+0x2a5/0x330 mm/vma.c:488
 vms_clear_ptes mm/vma.c:1284 [inline]
 vms_complete_munmap_vmas+0x493/0xc60 mm/vma.c:1326
 do_vmi_align_munmap+0x3bd/0x4d0 mm/vma.c:1585
 do_vmi_munmap+0x252/0x2d0 mm/vma.c:1633
 __vm_munmap+0x22c/0x3d0 mm/vma.c:3254
 __do_sys_munmap mm/mmap.c:1078 [inline]
 __se_sys_munmap mm/mmap.c:1075 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:1075
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88804e105a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88804e105b00: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc
>ffff88804e105b80: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff88804e105c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88804e105c80: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
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