From: Felix Fietkau <nbd@nbd.name>
Date: Tue, 9 Jan 2024 10:05:45 +0000 (+0100)
Subject: hostapd: add missing NULL pointer check on radar notification
X-Git-Tag: v6.1-20240701~76
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=3cbdba4d282311d7a69c0ef0e3d001e81c59512e;p=librecmc%2Flibrecmc.git

hostapd: add missing NULL pointer check on radar notification

Fixes a race condition that can lead to a hostapd crash

Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry picked from commit d864f68232e910f2c8ab06a66347fc08c257dfcc)
---

diff --git a/package/network/services/hostapd/src/src/ap/ubus.c b/package/network/services/hostapd/src/src/ap/ubus.c
index 693c054177..61b7c03160 100644
--- a/package/network/services/hostapd/src/src/ap/ubus.c
+++ b/package/network/services/hostapd/src/src/ap/ubus.c
@@ -1907,6 +1907,9 @@ void hostapd_ubus_notify_radar_detected(struct hostapd_iface *iface, int frequen
 	struct hostapd_data *hapd;
 	int i;
 
+	if (!ctx)
+		return;
+
 	blob_buf_init(&b, 0);
 	blobmsg_add_u16(&b, "frequency", frequency);
 	blobmsg_add_u16(&b, "width", chan_width);