fs/ntfs3: Fix case when index is reused during tree transformation

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commit 05afeeebca upstream.

In most cases when adding a cluster to the directory index,
they are placed at the end, and in the bitmap, this cluster corresponds
to the last bit. The new directory size is calculated as follows:

	data_size = (u64)(bit + 1) << indx->index_bits;

In the case of reusing a non-final cluster from the index,
data_size is calculated incorrectly, resulting in the directory size
differing from the actual size.

A check for cluster reuse has been added, and the size update is skipped.

Fixes: 82cae269cf ("fs/ntfs3: Add initialization of super block")
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Konstantin Komarov 2024-04-23 15:31:56 +03:00 • committed by Greg Kroah-Hartman

parent df40783dc3

commit c494fe4ccd

1 changed files with 6 additions and 0 deletions

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fs/ntfs3/index.c

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