From a718501ca51a396a99c6db5dce884175f390aef9 Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Thu, 4 Mar 2021 17:29:21 +0100
Subject: executor: disable rfkill during setup

If rfkill is enabled by the fuzzer, wifi setup will fail.
Disable rfkill to initial state during setup.
---
 pkg/csource/generated.go | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'pkg/csource/generated.go')

diff --git a/pkg/csource/generated.go b/pkg/csource/generated.go
index 62e9b0573..0b9e369dd 100644
--- a/pkg/csource/generated.go
+++ b/pkg/csource/generated.go
@@ -3187,6 +3187,11 @@ static int nl80211_setup_ibss_interface(struct nlmsg* nlmsg, int sock, int nl802
 #endif
 
 #if SYZ_EXECUTOR || SYZ_WIFI
+#include <fcntl.h>
+#include <linux/rfkill.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
 static int hwsim80211_create_device(struct nlmsg* nlmsg, int sock, int hwsim_family, uint8 mac_addr[ETH_ALEN])
 {
 	struct genlmsghdr genlhdr;
@@ -3209,6 +3214,19 @@ static void initialize_wifi_devices(void)
 	if (!flag_wifi)
 		return;
 #endif
+	int rfkill = open("/dev/rfkill", O_RDWR);
+	if (rfkill == -1) {
+		if (errno != ENOENT && errno != EACCES)
+			fail("open(/dev/rfkill) failed");
+	} else {
+		struct rfkill_event event = {0};
+		event.type = RFKILL_TYPE_ALL;
+		event.op = RFKILL_OP_CHANGE_ALL;
+		if (write(rfkill, &event, sizeof(event)) != (ssize_t)(sizeof(event)))
+			fail("write(/dev/rfkill) failed");
+		close(rfkill);
+	}
+
 	uint8 mac_addr[6] = WIFI_MAC_BASE;
 	int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
 	if (sock < 0) {
-- 
cgit mrf-deployment