merge-recursive: use xstrdup() instead of fixed buffer
Paths can be longer than PATH_MAX. Avoid a buffer overrun in
check_dir_renamed() by using xstrdup() to make a private copy safely.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/merge-recursive.c b/merge-recursive.c
index 5f42c67..7ea70c4 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -1938,18 +1938,18 @@ static struct hashmap *get_directory_renames(struct diff_queue_struct *pairs,
static struct dir_rename_entry *check_dir_renamed(const char *path,
struct hashmap *dir_renames)
{
- char temp[PATH_MAX];
+ char *temp = xstrdup(path);
char *end;
- struct dir_rename_entry *entry;
+ struct dir_rename_entry *entry = NULL;;
- strcpy(temp, path);
while ((end = strrchr(temp, '/'))) {
*end = '\0';
entry = dir_rename_find_entry(dir_renames, temp);
if (entry)
- return entry;
+ break;
}
- return NULL;
+ free(temp);
+ return entry;
}
static void compute_collisions(struct hashmap *collisions,
