libsmack: fix a bug in validation of labels

The function `get_label` didn't handle the characters below
' ' and above '~' correctly.

Signed-off-by: José Bollo <jose.bollo@open.eurogiciel.org>

diff --git a/libsmack/libsmack.c b/libsmack/libsmack.c
index a8672b6..913f04c 100644 (file)
--- a/libsmack/libsmack.c
+++ b/libsmack/libsmack.c
@@ -737,8 +737,9 @@ static inline ssize_t get_label(char *dest, const char *src)
                return -1;
 
        for (i = 0; i < (SMACK_LABEL_LEN + 1) && src[i]; i++) {
+               if (src[i] <= ' ' || src[i] > '~')
+                       return -1;
                switch (src[i]) {
-               case ' ':
                case '/':
                case '"':
                case '\\':