shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-05 18:41:58 +09:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
commit 05afeeebcac850a016ec4fb1f681ceda11963562 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>
This commit is contained in:
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
Download Patch File Download Diff File Expand all files Collapse all files

6
fs/ntfs3/index.c
View File

@@ -1531,6 +1531,11 @@ static int indx_add_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
goto out1; goto out1;
} }
if (data_size <= le64_to_cpu(alloc->nres.data_size)) {
/* Reuse index. */
goto out;
}
/* Increase allocation. */ /* Increase allocation. */
err = attr_set_size(ni, ATTR_ALLOC, in->name, in->name_len, err = attr_set_size(ni, ATTR_ALLOC, in->name, in->name_len,
&indx->alloc_run, data_size, &data_size, true, &indx->alloc_run, data_size, &data_size, true,
@@ -1541,6 +1546,7 @@ static int indx_add_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
goto out1; goto out1;
} }
out:
*vbn = bit << indx->idx2vbn_bits; *vbn = bit << indx->idx2vbn_bits;
return 0; return 0;