From 35c2958ae4caf70a3074f59fbceeb24cfe82f902 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Tue, 6 Jul 2021 08:18:38 +0000
Subject: Forbid empty session names, GitHub issue 2758.

---
 cmd-rename-session.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'cmd-rename-session.c')

diff --git a/cmd-rename-session.c b/cmd-rename-session.c
index 51b8ffc8..49fafe33 100644
--- a/cmd-rename-session.c
+++ b/cmd-rename-session.c
@@ -53,6 +53,11 @@ cmd_rename_session_exec(struct cmd *self, struct cmdq_item *item)
 
 	tmp = format_single_from_target(item, args->argv[0]);
 	newname = session_check_name(tmp);
+	if (newname == NULL) {
+		cmdq_error(item, "invalid session: %s", tmp);
+		free(tmp);
+		return (CMD_RETURN_ERROR);
+	}
 	free(tmp);
 	if (strcmp(newname, s->name) == 0) {
 		free(newname);
-- 
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