From b9a7173ab510c2e66b40636e55f2e9cb5b1c7d49 Mon Sep 17 00:00:00 2001
From: Ed Kellett <e@kellett.im>
Date: Tue, 13 Jul 2021 15:40:34 +0100
Subject: [PATCH] chmode: stop processing when too many modes

---
 ircd/chmode.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ircd/chmode.c b/ircd/chmode.c
index 65d14524..d6d9141a 100644
--- a/ircd/chmode.c
+++ b/ircd/chmode.c
@@ -1360,13 +1360,13 @@ set_channel_mode(struct Client *client_p, struct Client *source_p,
 		char mode;
 	};
 
-	static struct modeset modesets[MAXPARA];
+	static struct modeset modesets[MAXMODEPARAMS + MAXMODES_SIMPLE];
 	struct modeset *ms = modesets, *mend;
 	char canon_op = '\0';
 
 	mbuf = modebuf;
 
-	for (ml = parv[0]; *ml != 0; ml++)
+	for (ml = parv[0]; *ml != 0 && ms - modesets < ARRAY_SIZE(modesets); ml++)
 	{
 		c = *ml;
 		switch (c)