diff options
| -rw-r--r-- | fs/udf/unicode.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c index 05bc505ec01a..24d6165d21a9 100644 --- a/fs/udf/unicode.c +++ b/fs/udf/unicode.c @@ -48,14 +48,16 @@ int udf_build_ustr(struct ustr *dest, dstring *ptr, int size) { int usesize; - if ((!dest) || (!ptr) || (!size)) + if (!dest || !ptr || !size) return -1; + BUG_ON(size < 2); - memset(dest, 0, sizeof(struct ustr)); - usesize = (size > UDF_NAME_LEN) ? UDF_NAME_LEN : size; + usesize = min_t(size_t, ptr[size - 1], sizeof(dest->u_name)); + usesize = min(usesize, size - 2); dest->u_cmpID = ptr[0]; - dest->u_len = ptr[size - 1]; - memcpy(dest->u_name, ptr + 1, usesize - 1); + dest->u_len = usesize; + memcpy(dest->u_name, ptr + 1, usesize); + memset(dest->u_name + usesize, 0, sizeof(dest->u_name) - usesize); return 0; } |