cgfsng: fix off-by-one error

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/src/lxc/cgroups/cgfsng.c b/src/lxc/cgroups/cgfsng.c
index 1adc1ceeb1c23edcc8182f727c3199108b32b496..10086fb448abf6af272e3bbb02ddc3af280745ea 100644 (file)
--- a/src/lxc/cgroups/cgfsng.c
+++ b/src/lxc/cgroups/cgfsng.c
@@ -252,8 +252,8 @@ static char *cg_legacy_must_prefix_named(char *entry)
        len = strlen(entry);
        prefixed = must_alloc(len + 6);
 
-       memcpy(prefixed, "name=", sizeof("name="));
-       memcpy(prefixed + sizeof("name="), entry, len);
+       memcpy(prefixed, "name=", sizeof("name=") - 1);
+       memcpy(prefixed + sizeof("name=") - 1, entry, len);
        prefixed[len + 5] = '\0';
        return prefixed;
 }