5.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
[ Upstream commit 25610ff98d4a34e6a85cbe4fd8671be6b0829f8f ]
Сorrected calculation of required space len (in clusters)
for attribute data storage in case of compression.
Fixes: be71b5cba2e64 ("fs/ntfs3: Add attrib operations")
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/ntfs3/attrib.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c
index 558a7e9bf1ef2..e8fc86dab6114 100644
--- a/fs/ntfs3/attrib.c
+++ b/fs/ntfs3/attrib.c
@@ -242,7 +242,7 @@ int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr,
struct ntfs_sb_info *sbi;
struct ATTRIB *attr_s;
struct MFT_REC *rec;
- u32 used, asize, rsize, aoff, align;
+ u32 used, asize, rsize, aoff;
bool is_data;
CLST len, alen;
char *next;
@@ -263,10 +263,13 @@ int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr,
rsize = le32_to_cpu(attr->res.data_size);
is_data = attr->type == ATTR_DATA && !attr->name_len;
- align = sbi->cluster_size;
- if (is_attr_compressed(attr))
- align <<= NTFS_LZNT_CUNIT;
- len = (rsize + align - 1) >> sbi->cluster_bits;
+ /* len - how many clusters required to store 'rsize' bytes */
+ if (is_attr_compressed(attr)) {
+ u8 shift = sbi->cluster_bits + NTFS_LZNT_CUNIT;
+ len = ((rsize + (1u << shift) - 1) >> shift) << NTFS_LZNT_CUNIT;
+ } else {
+ len = bytes_to_cluster(sbi, rsize);
+ }
run_init(run);
--
2.43.0
