================================================================== BUG: KASAN: slab-use-after-free in xfs_inode_item_push+0x3c3/0x6d0 fs/xfs/xfs_inode_item.c:800 Read of size 8 at addr ffff88805c3c04c8 by task xfsaild/loop0/11459 CPU: 1 UID: 0 PID: 11459 Comm: xfsaild/loop0 Tainted: G W 6.16.0-syzkaller-11322-g352af6a011d5 #0 PREEMPT_{RT,(full)} Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 xfs_inode_item_push+0x3c3/0x6d0 fs/xfs/xfs_inode_item.c:800 xfsaild_push_item fs/xfs/xfs_trans_ail.c:390 [inline] xfsaild_push fs/xfs/xfs_trans_ail.c:518 [inline] xfsaild+0xd9b/0x2950 fs/xfs/xfs_trans_ail.c:700 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Allocated by task 11442: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] kmem_cache_alloc_noprof+0x143/0x310 mm/slub.c:4236 xfs_inode_item_init+0x33/0xd0 fs/xfs/xfs_inode_item.c:895 xfs_trans_ijoin+0xe5/0x130 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_create+0x656/0xad0 fs/xfs/xfs_inode.c:732 xfs_generic_create+0x3cc/0xad0 fs/xfs/xfs_iops.c:216 xfs_vn_mkdir+0x37/0x50 fs/xfs/xfs_iops.c:309 vfs_mkdir+0x303/0x510 fs/namei.c:4366 do_mkdirat+0x247/0x590 fs/namei.c:4399 __do_sys_mkdirat fs/namei.c:4416 [inline] __se_sys_mkdirat fs/namei.c:4414 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4414 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 28: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2417 [inline] slab_free mm/slub.c:4680 [inline] kmem_cache_free+0x195/0x510 mm/slub.c:4782 xfs_inode_free_callback+0x14f/0x1c0 fs/xfs/xfs_icache.c:161 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core kernel/rcu/tree.c:2861 [inline] rcu_cpu_kthread+0xbf3/0x1b50 kernel/rcu/tree.c:2949 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:160 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff88805c3c0498 which belongs to the cache xfs_ili of size 328 The buggy address is located 48 bytes inside of freed 328-byte region [ffff88805c3c0498, ffff88805c3c05e0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805c3c1570 pfn:0x5c3c0 head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x80000000000040(head|node=0|zone=1) page_type: f5(slab) raw: 0080000000000040 ffff888140b89640 dead000000000122 0000000000000000 raw: ffff88805c3c1570 0000000080140009 00000000f5000000 0000000000000000 head: 0080000000000040 ffff888140b89640 dead000000000122 0000000000000000 head: ffff88805c3c1570 0000000080140009 00000000f5000000 0000000000000000 head: 0080000000000001 ffffea000170f001 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 6072, tgid 6071 (syz.1.20), ts 125997301312, free_ts 124374727862 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x2119/0x21b0 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148 alloc_pages_mpol+0xd1/0x380 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:2487 [inline] allocate_slab+0x8a/0x370 mm/slub.c:2655 new_slab mm/slub.c:2709 [inline] ___slab_alloc+0x8d1/0xdd0 mm/slub.c:3891 __slab_alloc mm/slub.c:3981 [inline] __slab_alloc_node mm/slub.c:4056 [inline] slab_alloc_node mm/slub.c:4217 [inline] kmem_cache_alloc_noprof+0xe6/0x310 mm/slub.c:4236 xfs_inode_item_init+0x33/0xd0 fs/xfs/xfs_inode_item.c:895 xfs_trans_ijoin+0xe5/0x130 fs/xfs/libxfs/xfs_trans_inode.c:36 xfs_icreate+0xe4/0x160 fs/xfs/xfs_inode.c:605 xfs_qm_qino_alloc+0x232/0x6a0 fs/xfs/xfs_qm.c:1010 xfs_qm_init_quotainos+0x73c/0x980 fs/xfs/xfs_qm.c:1822 xfs_qm_init_quotainfo+0x175/0x1210 fs/xfs/xfs_qm.c:836 xfs_qm_mount_quotas+0xa6/0x670 fs/xfs/xfs_qm.c:1676 xfs_mountfs+0x1b6f/0x2330 fs/xfs/xfs_mount.c:1181 xfs_fs_fill_super+0x1185/0x15d0 fs/xfs/xfs_super.c:1965 page last free pid 5979 tgid 5979 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xb59/0xce0 mm/page_alloc.c:2895 discard_slab mm/slub.c:2753 [inline] __put_partials+0x159/0x1a0 mm/slub.c:3218 __slab_free+0x2b3/0x390 mm/slub.c:4550 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] kmem_cache_alloc_noprof+0x143/0x310 mm/slub.c:4236 mt_alloc_one lib/maple_tree.c:176 [inline] mas_alloc_nodes+0x2e9/0x8e0 lib/maple_tree.c:1255 mas_node_count_gfp lib/maple_tree.c:1337 [inline] mas_preallocate+0x3ad/0x6f0 lib/maple_tree.c:5537 vma_iter_prealloc mm/vma.h:462 [inline] commit_merge+0x1fa/0x620 mm/vma.c:753 vma_merge_existing_range mm/vma.c:973 [inline] vma_modify+0xf2d/0x1880 mm/vma.c:1608 vma_modify_flags+0x1e8/0x230 mm/vma.c:1649 mprotect_fixup+0x400/0x9b0 mm/mprotect.c:819 do_mprotect_pkey+0x8cd/0xce0 mm/mprotect.c:993 __do_sys_mprotect mm/mprotect.c:1014 [inline] __se_sys_mprotect mm/mprotect.c:1011 [inline] __x64_sys_mprotect+0x80/0x90 mm/mprotect.c:1011 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 Memory state around the buggy address: ffff88805c3c0380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805c3c0400: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc >ffff88805c3c0480: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805c3c0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805c3c0580: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================