Forbid empty session names, GitHub issue 2758.

1 files changed, 2 insertions, 0 deletions

diff --git a/session.c b/session.c
index 93d50b47..cb0093a2 100644
--- a/session.c
+++ b/session.c
@@ -237,6 +237,8 @@ session_check_name(const char *name)
 {
 	char	*copy, *cp, *new_name;
 
+	if (*name == '\0')
+		return (NULL);
 	copy = xstrdup(name);
 	for (cp = copy; *cp != '\0'; cp++) {
 		if (*cp == ':' || *cp == '.')