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authorKonstantin Komarov <almaz.alexandrovich@paragon-software.com>2024-04-23 15:31:56 +0300
committerKonstantin Komarov <almaz.alexandrovich@paragon-software.com>2024-05-24 12:50:12 +0300
commit05afeeebcac850a016ec4fb1f681ceda11963562 (patch)
treec6e951a385b23b6a52b6ff70e7a297727bf33390
parent24f6f5020b0b2c89c2cba5ec224547be95f753ee (diff)
downloadlinux-05afeeebcac850a016ec4fb1f681ceda11963562.tar.xz
fs/ntfs3: Fix case when index is reused during tree transformation
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: 82cae269cfa95 ("fs/ntfs3: Add initialization of super block") Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com> Cc: stable@vger.kernel.org
-rw-r--r--fs/ntfs3/index.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
index daabaad63aaf..14284f0ed46a 100644
--- a/fs/ntfs3/index.c
+++ b/fs/ntfs3/index.c
@@ -1533,6 +1533,11 @@ static int indx_add_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
goto out1;
}
+ if (data_size <= le64_to_cpu(alloc->nres.data_size)) {
+ /* Reuse index. */
+ goto out;
+ }
+
/* Increase allocation. */
err = attr_set_size(ni, ATTR_ALLOC, in->name, in->name_len,
&indx->alloc_run, data_size, &data_size, true,
@@ -1546,6 +1551,7 @@ static int indx_add_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
if (in->name == I30_NAME)
i_size_write(&ni->vfs_inode, data_size);
+out:
*vbn = bit << indx->idx2vbn_bits;
return 0;