================================================================== BUG: KASAN: use-after-free in xfs_iflush_cluster+0xc7/0x12e0 fs/xfs/xfs_inode.c:3653 Read of size 8 at addr ffff888074b7d190 by task xfsaild/loop2/4751 CPU: 1 PID: 4751 Comm: xfsaild/loop2 Not tainted 5.15.186-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 xfs_iflush_cluster+0xc7/0x12e0 fs/xfs/xfs_inode.c:3653 xfs_inode_item_push+0x1cd/0x2c0 fs/xfs/xfs_inode_item.c:567 xfsaild_push_item fs/xfs/xfs_trans_ail.c:414 [inline] xfsaild_push fs/xfs/xfs_trans_ail.c:472 [inline] xfsaild+0xce7/0x2780 fs/xfs/xfs_trans_ail.c:657 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 4755: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:725 [inline] xfs_inode_item_init+0x2f/0xc0 fs/xfs/xfs_inode_item.c:675 xfs_trans_ijoin+0xb2/0xe0 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_rename+0xa47/0x1c10 fs/xfs/xfs_inode.c:3178 xfs_vn_rename+0x2f6/0x3e0 fs/xfs/xfs_iops.c:475 vfs_rename+0xbbf/0x10d0 fs/namei.c:4832 do_renameat2+0xa83/0xf70 fs/namei.c:4985 __do_sys_rename fs/namei.c:5031 [inline] __se_sys_rename fs/namei.c:5029 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5029 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 20: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xea/0x170 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kmem_cache_free+0x8f/0x210 mm/slub.c:3515 xfs_inode_free_callback+0x1bc/0x230 fs/xfs/xfs_icache.c:142 rcu_do_batch kernel/rcu/tree.c:2523 [inline] rcu_core+0x962/0x15d0 kernel/rcu/tree.c:2763 handle_softirqs+0x328/0x820 kernel/softirq.c:576 run_ksoftirqd+0x98/0xf0 kernel/softirq.c:943 smpboot_thread_fn+0x4f6/0x970 kernel/smpboot.c:164 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 The buggy address belongs to the object at ffff888074b7d140 which belongs to the cache xfs_ili of size 256 The buggy address is located 80 bytes inside of 256-byte region [ffff888074b7d140, ffff888074b7d240) The buggy address belongs to the page: page:ffffea0001d2df40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x74b7d flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000122 ffff8881467bc640 raw: 0000000000000000 00000000800c000c 00000001ffffffff 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 0x112c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 4755, ts 102684386534, free_ts 89488689404 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5474 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1975 ___slab_alloc+0x81e/0xdf0 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x195/0x290 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:725 [inline] xfs_inode_item_init+0x2f/0xc0 fs/xfs/xfs_inode_item.c:675 xfs_trans_ijoin+0xb2/0xe0 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_rename+0xa28/0x1c10 fs/xfs/xfs_inode.c:3176 xfs_vn_rename+0x2f6/0x3e0 fs/xfs/xfs_iops.c:475 vfs_rename+0xbbf/0x10d0 fs/namei.c:4832 do_renameat2+0xa83/0xf70 fs/namei.c:4985 __do_sys_rename fs/namei.c:5031 [inline] __se_sys_rename fs/namei.c:5029 [inline] __x64_sys_rename+0x82/0x90 fs/namei.c:5029 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x94/0x280 mm/page_alloc.c:3396 free_slab mm/slub.c:2015 [inline] discard_slab mm/slub.c:2021 [inline] __unfreeze_partials+0x1a5/0x200 mm/slub.c:2507 put_cpu_partial+0x12d/0x190 mm/slub.c:2587 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3233 anon_vma_alloc mm/rmap.c:90 [inline] anon_vma_fork+0xe3/0x500 mm/rmap.c:356 dup_mmap kernel/fork.c:574 [inline] dup_mm kernel/fork.c:1466 [inline] copy_mm+0x9e3/0x1370 kernel/fork.c:1518 copy_process+0x17c6/0x3e00 kernel/fork.c:2290 kernel_clone+0x219/0x930 kernel/fork.c:2679 __do_sys_clone kernel/fork.c:2796 [inline] __se_sys_clone kernel/fork.c:2780 [inline] __x64_sys_clone+0x170/0x1c0 kernel/fork.c:2780 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff888074b7d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888074b7d100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb >ffff888074b7d180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888074b7d200: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888074b7d280: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================