================================================================== BUG: KASAN: slab-use-after-free in xfs_inode_item_push+0x28a/0x2e0 fs/xfs/xfs_inode_item.c:776 Read of size 8 at addr ffff88802e94a550 by task xfsaild/loop3/6624 CPU: 0 PID: 6624 Comm: xfsaild/loop3 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xac/0x220 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 xfs_inode_item_push+0x28a/0x2e0 fs/xfs/xfs_inode_item.c:776 xfsaild_push_item fs/xfs/xfs_trans_ail.c:414 [inline] xfsaild_push fs/xfs/xfs_trans_ail.c:486 [inline] xfsaild+0xc58/0x25b0 fs/xfs/xfs_trans_ail.c:671 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 Allocated by task 6601: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc+0x11e/0x2e0 mm/slub.c:3519 kmem_cache_zalloc include/linux/slab.h:711 [inline] xfs_inode_item_init+0x33/0xc0 fs/xfs/xfs_inode_item.c:871 xfs_trans_ijoin+0xd8/0x120 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_trans_alloc_ichange+0xd8/0x530 fs/xfs/xfs_trans.c:1297 xfs_ioctl_setattr_get_trans fs/xfs/xfs_ioctl.c:1220 [inline] xfs_fileattr_set+0x5e0/0x17c0 fs/xfs/xfs_ioctl.c:1367 vfs_fileattr_set+0x846/0xaf0 fs/ioctl.c:697 ioctl_setflags fs/ioctl.c:729 [inline] do_vfs_ioctl+0x135a/0x1bb0 fs/ioctl.c:840 __do_sys_ioctl fs/ioctl.c:869 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 5792: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1811 [inline] slab_free_freelist_hook+0x130/0x1b0 mm/slub.c:1837 slab_free mm/slub.c:3830 [inline] kmem_cache_free+0xf8/0x280 mm/slub.c:3852 xfs_inode_free_callback+0x14f/0x1c0 fs/xfs/xfs_icache.c:145 rcu_do_batch kernel/rcu/tree.c:2194 [inline] rcu_core+0xcc4/0x1720 kernel/rcu/tree.c:2467 handle_softirqs+0x280/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 The buggy address belongs to the object at ffff88802e94a520 which belongs to the cache xfs_ili of size 264 The buggy address is located 48 bytes inside of freed 264-byte region [ffff88802e94a520, ffff88802e94a628) The buggy address belongs to the physical page: page:ffffea0000ba5280 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802e94a290 pfn:0x2e94a flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888018b18dc0 dead000000000122 0000000000000000 raw: ffff88802e94a290 00000000800c0008 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 5899, tgid 5897 (syz.3.4), ts 98270891586, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457 alloc_slab_page+0x5d/0x170 mm/slub.c:1881 allocate_slab mm/slub.c:2028 [inline] new_slab+0x87/0x2e0 mm/slub.c:2081 ___slab_alloc+0xc6d/0x1300 mm/slub.c:3253 __slab_alloc mm/slub.c:3339 [inline] __slab_alloc_node mm/slub.c:3392 [inline] slab_alloc_node mm/slub.c:3485 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc+0x1b7/0x2e0 mm/slub.c:3519 kmem_cache_zalloc include/linux/slab.h:711 [inline] xfs_inode_item_init+0x33/0xc0 fs/xfs/xfs_inode_item.c:871 xfs_trans_ijoin+0xd8/0x120 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_init_new_inode+0xb9e/0xec0 fs/xfs/xfs_inode.c:901 xfs_create+0x746/0xe60 fs/xfs/xfs_inode.c:1031 xfs_generic_create+0x32d/0xa00 fs/xfs/xfs_iops.c:200 lookup_open fs/namei.c:3488 [inline] open_last_lookups fs/namei.c:3556 [inline] path_openat+0x1277/0x3190 fs/namei.c:3786 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419 do_sys_open fs/open.c:1434 [inline] __do_sys_openat fs/open.c:1450 [inline] __se_sys_openat fs/open.c:1445 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1445 page_owner free stack trace missing Memory state around the buggy address: ffff88802e94a400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802e94a480: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff88802e94a500: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802e94a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802e94a600: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb ==================================================================