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BUG: KASAN: slab-use-after-free in xfs_inode_item_push+0x396/0x670 fs/xfs/xfs_inode_item.c:798
Read of size 8 at addr ffff88806294f728 by task xfsaild/loop4/7413

CPU: 0 UID: 0 PID: 7413 Comm: xfsaild/loop4 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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+0x396/0x670 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+0xf55/0x28e0 fs/xfs/xfs_trans_ail.c:700
 kthread+0x388/0x470 kernel/kthread.c:467
 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 7400:
 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:4459 [inline]
 slab_alloc_node mm/slub.c:4788 [inline]
 kmem_cache_alloc_noprof+0x33b/0x680 mm/slub.c:4795
 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+0x378/0x540 fs/xfs/xfs_iops.c:1225
 touch_atime+0x2f8/0x6b0 fs/inode.c:2262
 file_accessed include/linux/fs.h:2263 [inline]
 filemap_read+0x105c/0x1240 mm/filemap.c:2872
 xfs_file_buffered_read+0x18e/0x330 fs/xfs/xfs_file.c:315
 xfs_file_read_iter+0x282/0x510 fs/xfs/xfs_file.c:340
 __kernel_read+0x50d/0x9c0 fs/read_write.c:532
 integrity_kernel_read+0x89/0xd0 security/integrity/iint.c:28
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
 ima_calc_file_hash+0x12cf/0x1800 security/integrity/ima/ima_crypto.c:568
 ima_collect_measurement+0x491/0x930 security/integrity/ima/ima_api.c:293
 process_measurement+0x12d9/0x1c90 security/integrity/ima/ima_main.c:407
 ima_file_check+0xe1/0x130 security/integrity/ima/ima_main.c:667
 security_file_post_open+0xb3/0x260 security/security.c:2652
 do_open fs/namei.c:4673 [inline]
 path_openat+0x2e82/0x38a0 fs/namei.c:4830
 do_file_open+0x23e/0x4a0 fs/namei.c:4859
 do_sys_openat2+0x113/0x200 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1383
 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:2670 [inline]
 slab_free mm/slub.c:6082 [inline]
 kmem_cache_free+0x185/0x690 mm/slub.c:6212
 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:467
 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 ffff88806294f6f8
 which belongs to the cache xfs_ili of size 328
The buggy address is located 48 bytes inside of
 freed 328-byte region [ffff88806294f6f8, ffff88806294f840)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88806294f880 pfn:0x6294e
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 ffff888140ac78c0 ffff88801f312288 ffffea00018a5410
raw: ffff88806294f880 0000000000140010 00000000f5000000 0000000000000000
head: 0080000000000240 ffff888140ac78c0 ffff88801f312288 ffffea00018a5410
head: ffff88806294f880 0000000000140010 00000000f5000000 0000000000000000
head: 0080000000000001 ffffea00018a5381 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 5911, tgid 5909 (syz.0.1), ts 82334410849, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
 prep_new_page mm/page_alloc.c:1892 [inline]
 get_page_from_freelist+0x28bb/0x2950 mm/page_alloc.c:3950
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5245
 alloc_slab_page mm/slub.c:3238 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3411
 new_slab mm/slub.c:3469 [inline]
 refill_objects+0x334/0x3c0 mm/slub.c:7091
 refill_sheaf+0x29/0x50 mm/slub.c:2787
 alloc_full_sheaf mm/slub.c:2808 [inline]
 __pcs_replace_empty_main+0x3ab/0x5f0 mm/slub.c:4546
 alloc_from_pcs mm/slub.c:4639 [inline]
 slab_alloc_node mm/slub.c:4773 [inline]
 kmem_cache_alloc_noprof+0x433/0x680 mm/slub.c:4795
 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_create+0x648/0xae0 fs/xfs/xfs_inode.c:721
 xfs_generic_create+0x413/0xb30 fs/xfs/xfs_iops.c:216
 xfs_vn_mkdir+0x37/0x50 fs/xfs/xfs_iops.c:309
 vfs_mkdir+0x40b/0x630 fs/namei.c:5233
 filename_mkdirat+0x289/0x520 fs/namei.c:5266
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88806294f600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88806294f680: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa
>ffff88806294f700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88806294f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88806294f800: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
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