--- /dev/null
+From 6f4f147d8e86adf9ad34a8ffd7e7f1f23a7e74da Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?S=C3=A9bastien=20Helleu?= <flashcode@flashtux.org>
+Date: Sat, 8 Feb 2020 20:24:50 +0100
+Subject: [PATCH] irc: fix crash when receiving a malformed message 324
+ (channel mode)
+
+Thanks to Stuart Nevans Locke for reporting the issue.
+---
+ ChangeLog.adoc | 1 +
+ src/plugins/irc/irc-mode.c | 21 ++++++++++++---------
+ 2 files changed, 13 insertions(+), 9 deletions(-)
+
+diff --git a/src/plugins/irc/irc-mode.c b/src/plugins/irc/irc-mode.c
+index 2237a344b..e79f0deb7 100644
+--- a/src/plugins/irc/irc-mode.c
++++ b/src/plugins/irc/irc-mode.c
+@@ -224,17 +224,20 @@ irc_mode_channel_update (struct t_irc_server *server,
+ current_arg++;
+ if (pos[0] == chanmode)
+ {
+- chanmode_found = 1;
+- if (set_flag == '+')
++ if (!chanmode_found)
+ {
+- str_mode[0] = pos[0];
+- str_mode[1] = '\0';
+- strcat (new_modes, str_mode);
+- if (argument)
++ chanmode_found = 1;
++ if (set_flag == '+')
+ {
+- if (new_args[0])
+- strcat (new_args, " ");
+- strcat (new_args, argument);
++ str_mode[0] = pos[0];
++ str_mode[1] = '\0';
++ strcat (new_modes, str_mode);
++ if (argument)
++ {
++ if (new_args[0])
++ strcat (new_args, " ");
++ strcat (new_args, argument);
++ }
+ }
+ }
+ }