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lwip - Fix lwip_mac_address buffer overflow 

Sounds serious, but should be benign.

Signed-off-by: Tony Wu <tonywu@realtek.com>
pull/3191/head
Tony Wu 2016-11-03 14:38:23 +08:00 committed by Tony Wu
parent 16a8d2380e
commit d039d30abe
1 changed files with 3 additions and 3 deletions
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6
features/FEATURE_LWIP/lwip-interface/lwip_stack.c
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@ -104,7 +104,7 @@ static void mbed_lwip_socket_callback(struct netconn *nc, enum netconn_evt eh, u
/* TCP/IP and Network Interface Initialisation */
static struct netif lwip_netif;
static bool lwip_dhcp = false;
static char lwip_mac_address[NSAPI_MAC_SIZE] = "\0";
static char lwip_mac_address[NSAPI_MAC_SIZE];
#if !LWIP_IPV4 || !LWIP_IPV6
static bool all_zeros(const uint8_t *p, int len)
@ -309,13 +309,13 @@ static void mbed_lwip_netif_status_irq(struct netif *lwip_netif)
static void mbed_lwip_set_mac_address(void)
{
#if (MBED_MAC_ADDRESS_SUM != MBED_MAC_ADDR_INTERFACE)
snprintf(lwip_mac_address, 19, "%02x:%02x:%02x:%02x:%02x:%02x",
snprintf(lwip_mac_address, NSAPI_MAC_SIZE, "%02x:%02x:%02x:%02x:%02x:%02x",
MBED_MAC_ADDR_0, MBED_MAC_ADDR_1, MBED_MAC_ADDR_2,
MBED_MAC_ADDR_3, MBED_MAC_ADDR_4, MBED_MAC_ADDR_5);
#else
char mac[6];
mbed_mac_address(mac);
snprintf(lwip_mac_address, 19, "%02x:%02x:%02x:%02x:%02x:%02x",
snprintf(lwip_mac_address, NSAPI_MAC_SIZE, "%02x:%02x:%02x:%02x:%02x:%02x",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
#endif
}