ar71xx: avoid possible NULL pointer dereference in ath79_init_{,local}_mac

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33575 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c b/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c
index d2d0ee8..4487958 100644 (file)
--- a/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c
@@ -992,7 +992,10 @@ void __init ath79_init_mac(unsigned char *dst, const unsigned char *src,
 {
        int t;
 
-       if (!is_valid_ether_addr(src)) {
+       if (!dst)
+               return;
+
+       if (!src || !is_valid_ether_addr(src)) {
                memset(dst, '\0', ETH_ALEN);
                return;
        }
@@ -1012,7 +1015,10 @@ void __init ath79_init_local_mac(unsigned char *dst, const unsigned char *src)
 {
        int i;
 
-       if (!is_valid_ether_addr(src)) {
+       if (!dst)
+               return;
+
+       if (!src || !is_valid_ether_addr(src)) {
                memset(dst, '\0', ETH_ALEN);
                return;
        }