nixpkgs/pkgs/tools/misc/tmux/CVE-2022-47016.patch

From 01f753df5dc269cf054b94c3f210aa880872d602 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Wed, 24 Aug 2022 07:22:30 +0000
Subject: [PATCH] Check for NULL returns from bufferevent_new.

(cherry picked from commit e86752820993a00e3d28350cbe46878ba95d9012)
---
 control.c | 4 ++++
 file.c    | 4 ++++
 window.c  | 2 ++
 3 files changed, 10 insertions(+)

diff --git a/control.c b/control.c
index 73286e00..6183a006 100644
--- a/control.c
+++ b/control.c
@@ -775,6 +775,8 @@ control_start(struct client *c)
 
 	cs->read_event = bufferevent_new(c->fd, control_read_callback,
 	    control_write_callback, control_error_callback, c);
+	if (cs->read_event == NULL)
+		fatalx("out of memory");
 	bufferevent_enable(cs->read_event, EV_READ);
 
 	if (c->flags & CLIENT_CONTROLCONTROL)
@@ -782,6 +784,8 @@ control_start(struct client *c)
 	else {
 		cs->write_event = bufferevent_new(c->out_fd, NULL,
 		    control_write_callback, control_error_callback, c);
+		if (cs->write_event == NULL)
+			fatalx("out of memory");
 	}
 	bufferevent_setwatermark(cs->write_event, EV_WRITE, CONTROL_BUFFER_LOW,
 	    0);
diff --git a/file.c b/file.c
index b2f155fe..04a907bf 100644
--- a/file.c
+++ b/file.c
@@ -585,6 +585,8 @@ file_write_open(struct client_files *files, struct tmuxpeer *peer,
 
 	cf->event = bufferevent_new(cf->fd, NULL, file_write_callback,
 	    file_write_error_callback, cf);
+	if (cf->event == NULL)
+		fatalx("out of memory");
 	bufferevent_enable(cf->event, EV_WRITE);
 	goto reply;
 
@@ -744,6 +746,8 @@ file_read_open(struct client_files *files, struct tmuxpeer *peer,
 
 	cf->event = bufferevent_new(cf->fd, file_read_callback, NULL,
 	    file_read_error_callback, cf);
+	if (cf->event == NULL)
+		fatalx("out of memory");
 	bufferevent_enable(cf->event, EV_READ);
 	return;
 
diff --git a/window.c b/window.c
index c0cd9bdc..294a1f08 100644
--- a/window.c
+++ b/window.c
@@ -1042,6 +1042,8 @@ window_pane_set_event(struct window_pane *wp)
 
 	wp->event = bufferevent_new(wp->fd, window_pane_read_callback,
 	    NULL, window_pane_error_callback, wp);
+	if (wp->event == NULL)
+		fatalx("out of memory");
 	wp->ictx = input_init(wp, wp->event, &wp->palette);
 
 	bufferevent_enable(wp->event, EV_READ|EV_WRITE);
-- 
2.39.1