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Diffstat (limited to 'fs/ntfs3/lznt.c')
-rw-r--r--fs/ntfs3/lznt.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ntfs3/lznt.c b/fs/ntfs3/lznt.c
index 4aae598d6d88..fdc9b2ebf341 100644
--- a/fs/ntfs3/lznt.c
+++ b/fs/ntfs3/lznt.c
@@ -236,6 +236,9 @@ static inline ssize_t decompress_chunk(u8 *unc, u8 *unc_end, const u8 *cmpr,
/* Do decompression until pointers are inside range. */
while (up < unc_end && cmpr < cmpr_end) {
+ // return err if more than LZNT_CHUNK_SIZE bytes are written
+ if (up - unc > LZNT_CHUNK_SIZE)
+ return -EINVAL;
/* Correct index */
while (unc + s_max_off[index] < up)
index += 1;