================================================================== BUG: KASAN: use-after-free in xfs_iflush_cluster+0xbda/0x1050 fs/xfs/xfs_inode.c:3646 Read of size 8 at addr ffff88806dca3690 by task xfsaild/loop4/6740 CPU: 0 PID: 6740 Comm: xfsaild/loop4 Not tainted 5.15.185-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x41/0x5e lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x6c/0x309 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:451 xfs_iflush_cluster+0xbda/0x1050 fs/xfs/xfs_inode.c:3646 xfs_inode_item_push+0x1c7/0x2c0 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+0x80f/0x1e00 fs/xfs/xfs_trans_ail.c:657 kthread+0x30c/0x3d0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Allocated by task 6699: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x61/0x80 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x223/0x370 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:725 [inline] xfs_inode_item_init+0x1b/0xb0 fs/xfs/xfs_inode_item.c:675 xfs_trans_ijoin+0x9b/0xf0 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_create+0xa73/0xf80 fs/xfs/xfs_inode.c:1056 xfs_generic_create+0x228/0x620 fs/xfs/xfs_iops.c:197 lookup_open.isra.0+0xe3b/0x1680 fs/namei.c:3462 open_last_lookups fs/namei.c:3532 [inline] path_openat+0x7e3/0x2360 fs/namei.c:3739 do_filp_open+0x199/0x3d0 fs/namei.c:3769 do_sys_openat2+0x11e/0x400 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_open fs/open.c:1277 [inline] __se_sys_open fs/open.c:1273 [inline] __x64_sys_open+0xfd/0x1a0 fs/open.c:1273 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 4260: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:360 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free mm/kasan/common.c:328 [inline] __kasan_slab_free+0xe0/0x110 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook mm/slub.c:1731 [inline] slab_free mm/slub.c:3499 [inline] kmem_cache_free+0x7e/0x470 mm/slub.c:3515 xfs_inode_free_callback+0x195/0x2a0 fs/xfs/xfs_icache.c:142 rcu_do_batch kernel/rcu/tree.c:2523 [inline] rcu_core+0x549/0x11b0 kernel/rcu/tree.c:2763 handle_softirqs+0x1ef/0x520 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu kernel/softirq.c:659 [inline] irq_exit_rcu+0xd0/0x110 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0x6a/0x90 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 The buggy address belongs to the object at ffff88806dca3640 which belongs to the cache xfs_ili of size 256 The buggy address is located 80 bytes inside of 256-byte region [ffff88806dca3640, ffff88806dca3740) The buggy address belongs to the page: page:ffffea0001b728c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6dca3 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001cdda40 0000000400000004 ffff888140df2b40 raw: 0000000000000000 00000000000c000c 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 3336, ts 90276061288, free_ts 54850664194 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1369/0x31f0 mm/page_alloc.c:4192 __alloc_pages+0x1b2/0x440 mm/page_alloc.c:5474 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab+0x2eb/0x430 mm/slub.c:1912 new_slab mm/slub.c:1975 [inline] ___slab_alloc+0xa4b/0xfe0 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+0x31f/0x370 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:725 [inline] xfs_inode_item_init+0x1b/0xb0 fs/xfs/xfs_inode_item.c:675 xfs_trans_ijoin+0x9b/0xf0 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_trans_alloc_dir+0x188/0x3f0 fs/xfs/xfs_trans.c:1246 xfs_remove+0x380/0x9c0 fs/xfs/xfs_inode.c:2792 xfs_vn_unlink+0xf3/0x200 fs/xfs/xfs_iops.c:387 vfs_unlink+0x291/0x800 fs/namei.c:4280 do_unlinkat+0x30f/0x550 fs/namei.c:4348 __do_sys_unlink fs/namei.c:4396 [inline] __se_sys_unlink fs/namei.c:4394 [inline] __x64_sys_unlink+0xa0/0xe0 fs/namei.c:4394 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x33/0xb0 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+0x379/0x850 mm/page_alloc.c:1391 free_unref_page_prepare mm/page_alloc.c:3317 [inline] free_unref_page+0x19/0x4b0 mm/page_alloc.c:3396 __unfreeze_partials+0x2b9/0x2d0 mm/slub.c:2507 qlink_free mm/kasan/quarantine.c:157 [inline] qlist_free_all+0x68/0x110 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x180/0x1f0 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x73/0x80 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x223/0x370 mm/slub.c:3233 anon_vma_chain_alloc mm/rmap.c:138 [inline] __anon_vma_prepare+0x4a/0x4d0 mm/rmap.c:192 anon_vma_prepare include/linux/rmap.h:152 [inline] do_anonymous_page mm/memory.c:3836 [inline] handle_pte_fault mm/memory.c:4648 [inline] __handle_mm_fault+0x3227/0x35c0 mm/memory.c:4785 handle_mm_fault+0x1c5/0x5b0 mm/memory.c:4883 do_user_addr_fault+0x298/0xc80 arch/x86/mm/fault.c:1357 handle_page_fault arch/x86/mm/fault.c:1445 [inline] exc_page_fault+0x5a/0xb0 arch/x86/mm/fault.c:1501 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 Memory state around the buggy address: ffff88806dca3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806dca3600: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb >ffff88806dca3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88806dca3700: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88806dca3780: fa fb fb fb fb 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