grsecurity: fix Error fopen:network_get_defaultgw(479): Permission denied

1 files changed, 3 insertions, 0 deletions

diff --git a/src/firejail/network_main.c b/src/firejail/network_main.c
index 3fb79b9f4..a8ebb3480 100644
--- a/src/firejail/network_main.c
+++ b/src/firejail/network_main.c
@@ -212,7 +212,10 @@ void net_check_cfg(void) {
                 // first network is a mac device
                 else {
                         // get the host default gw
+                        EUID_ROOT();    // rise permissions for grsecurity
+                        // Error fopen:network_get_defaultgw(479): Permission denied
                         uint32_t gw = network_get_defaultgw();
+                        EUID_USER();
                         // check the gateway is network range
                         if (in_netrange(gw, cfg.bridge0.ip, cfg.bridge0.mask))
                                 gw = 0;