================================================================== BUG: KASAN: use-after-free in ntfs_attr_find+0x7d6/0xd50 fs/ntfs/attrib.c:609 Read of size 2 at addr ffff8880af6880a2 by task syz-executor.2/25929 CPU: 0 PID: 25929 Comm: syz-executor.2 Not tainted 6.1.25-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 ntfs_attr_find+0x7d6/0xd50 fs/ntfs/attrib.c:609 ntfs_attr_lookup+0x4e0/0x2390 ntfs_read_locked_inode+0xd80/0x49c0 fs/ntfs/inode.c:999 ntfs_read_inode_mount+0xda2/0x2660 fs/ntfs/inode.c:2098 ntfs_fill_super+0x1880/0x2bd0 fs/ntfs/super.c:2855 mount_bdev+0x26d/0x3a0 fs/super.c:1423 legacy_get_tree+0xeb/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1553 do_new_mount+0x28b/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd42fe8d69a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd430cd7f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000001f604 RCX: 00007fd42fe8d69a RDX: 000000002001f6c0 RSI: 000000002001f640 RDI: 00007fd430cd7fe0 RBP: 00007fd430cd8020 R08: 00007fd430cd8020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000000002001f6c0 R13: 000000002001f640 R14: 00007fd430cd7fe0 R15: 000000002001f680 The buggy address belongs to the physical page: page:ffffea0002bda200 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0xaf688 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 ffffea0002bfc248 ffffea0002b9e588 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO), pid 25861, tgid 25861 (syz-executor.1), ts 2687554096085, free_ts 2687699907287 prep_new_page mm/page_alloc.c:2540 [inline] get_page_from_freelist+0x32ed/0x3480 mm/page_alloc.c:4292 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5559 __folio_alloc+0xf/0x30 mm/page_alloc.c:5591 vma_alloc_folio+0x486/0x990 mm/mempolicy.c:2248 alloc_page_vma include/linux/gfp.h:284 [inline] do_anonymous_page mm/memory.c:4123 [inline] handle_pte_fault mm/memory.c:4962 [inline] __handle_mm_fault mm/memory.c:5106 [inline] handle_mm_fault+0x2b04/0x5140 mm/memory.c:5227 do_user_addr_fault arch/x86/mm/fault.c:1428 [inline] handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x58d/0x790 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1460 [inline] free_pcp_prepare mm/page_alloc.c:1510 [inline] free_unref_page_prepare+0xf5e/0x1110 mm/page_alloc.c:3388 free_unref_page_list+0x107/0x810 mm/page_alloc.c:3530 release_pages+0x2836/0x2b40 mm/swap.c:1055 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:254 [inline] tlb_flush_mmu+0xfc/0x210 mm/mmu_gather.c:261 zap_pte_range mm/memory.c:1515 [inline] zap_pmd_range mm/memory.c:1564 [inline] zap_pud_range mm/memory.c:1593 [inline] zap_p4d_range mm/memory.c:1614 [inline] unmap_page_range+0x2112/0x26e0 mm/memory.c:1635 unmap_vmas+0x3c4/0x560 mm/memory.c:1720 exit_mmap+0x252/0x9f0 mm/mmap.c:3089 __mmput+0x115/0x3c0 kernel/fork.c:1191 exit_mm+0x226/0x300 kernel/exit.c:563 do_exit+0x67e/0x2300 kernel/exit.c:856 do_group_exit+0x202/0x2b0 kernel/exit.c:1019 get_signal+0x16f7/0x17d0 kernel/signal.c:2858 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297 Memory state around the buggy address: ffff8880af687f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880af688000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8880af688080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8880af688100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8880af688180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================