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-rw-r--r--lib/parser.c32
1 files changed, 20 insertions, 12 deletions
diff --git a/lib/parser.c b/lib/parser.c
index 703c8c13b346..4f0cbc03e0e8 100644
--- a/lib/parser.c
+++ b/lib/parser.c
@@ -182,18 +182,25 @@ int match_hex(substring_t *s, int *result)
182} 182}
183 183
184/** 184/**
185 * match_strcpy: - copies the characters from a substring_t to a string 185 * match_strlcpy: - Copy the characters from a substring_t to a sized buffer
186 * @to: string to copy characters to. 186 * @dest: where to copy to
187 * @s: &substring_t to copy 187 * @src: &substring_t to copy
188 * @size: size of destination buffer
188 * 189 *
189 * Description: Copies the set of characters represented by the given 190 * Description: Copy the characters in &substring_t @src to the
190 * &substring_t @s to the c-style string @to. Caller guarantees that @to is 191 * c-style string @dest. Copy no more than @size - 1 characters, plus
191 * large enough to hold the characters of @s. 192 * the terminating NUL. Return length of @src.
192 */ 193 */
193void match_strcpy(char *to, const substring_t *s) 194size_t match_strlcpy(char *dest, const substring_t *src, size_t size)
194{ 195{
195 memcpy(to, s->from, s->to - s->from); 196 size_t ret = src->to - src->from;
196 to[s->to - s->from] = '\0'; 197
198 if (size) {
199 size_t len = ret >= size ? size - 1 : ret;
200 memcpy(dest, src->from, len);
201 dest[len] = '\0';
202 }
203 return ret;
197} 204}
198 205
199/** 206/**
@@ -206,9 +213,10 @@ void match_strcpy(char *to, const substring_t *s)
206 */ 213 */
207char *match_strdup(const substring_t *s) 214char *match_strdup(const substring_t *s)
208{ 215{
209 char *p = kmalloc(s->to - s->from + 1, GFP_KERNEL); 216 size_t sz = s->to - s->from + 1;
217 char *p = kmalloc(sz, GFP_KERNEL);
210 if (p) 218 if (p)
211 match_strcpy(p, s); 219 match_strlcpy(p, s, sz);
212 return p; 220 return p;
213} 221}
214 222
@@ -216,5 +224,5 @@ EXPORT_SYMBOL(match_token);
216EXPORT_SYMBOL(match_int); 224EXPORT_SYMBOL(match_int);
217EXPORT_SYMBOL(match_octal); 225EXPORT_SYMBOL(match_octal);
218EXPORT_SYMBOL(match_hex); 226EXPORT_SYMBOL(match_hex);
219EXPORT_SYMBOL(match_strcpy); 227EXPORT_SYMBOL(match_strlcpy);
220EXPORT_SYMBOL(match_strdup); 228EXPORT_SYMBOL(match_strdup);