ntfs: fix memmove overlap in ntfs_new_attr_flags

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When the record shrinks while the payload offsets increase (e.g., enabling
compression reduces padding, making arec_size < old_arec_size, but the header
grows by 8 bytes), moving the name first can overwrite the old mapping_pairs
before they are copied. Move mapping_pairs first in this case.

Since mp_ofs is derived from name_ofs, they always change in the same
direction. Checking name_ofs alone is sufficient.

Fixes: fc053f05ca ("ntfs: add reparse and ea operations")
Cc: stable@vger.kernel.org
Signed-off-by: Hongling Zeng <zenghongling@kylinos.cn>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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Hongling Zeng 2026-08-24 15:59:35 +08:00 • committed by Namjae Jeon

parent 6faa235a64

commit acb1095fd2

1 changed files with 27 additions and 6 deletions

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fs/ntfs/ea.c

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