ntfs: zero out stale data in straddle block beyond initialized_size

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ntfs_read_iomap_begin_non_resident() rounds up MAPPED extents
to the block boundary of initialized_size. This ensures that
any subsequent blocks are treated as IOMAP_UNWRITTEN, but
it also causes the "straddle block" containing initialized_size
to be read from disk. The disk data beyond initialized_size in
this block is stale and must be zeroed to prevent data leakage.

Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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Hyunchul Lee 2026-04-01 16:24:57 +09:00 • committed by Namjae Jeon

parent 8541d8f725

commit 8b4064e614

2 changed files with 45 additions and 11 deletions

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47

fs/ntfs/aops.c

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9

fs/ntfs/file.c

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