udev: catch genuine_random_bytes() failures

Fixes: CID#1428926
2020-05-28 23:38:25 +02:00
parent 70d8586365
commit a745117dba
1 changed files with 3 additions and 1 deletions
@@ -332,7 +332,9 @@ static int get_mac(sd_device *device, MACAddressPolicy policy, struct ether_addr
                /* We require genuine randomness here, since we want to make sure we won't collide with other
                 * systems booting up at the very same time. We do allow RDRAND however, since this is not
                 * cryptographic key material. */
-                genuine_random_bytes(mac->ether_addr_octet, ETH_ALEN, RANDOM_ALLOW_RDRAND);
+                r = genuine_random_bytes(mac->ether_addr_octet, ETH_ALEN, RANDOM_ALLOW_RDRAND);
+                if (r < 0)
+                        return log_device_error_errno(device, r, "Failed to acquire random data to generate MAC: %m");
        } else {
                uint64_t result;