diff options
| author | Gerhard Sittig | 2013-06-05 14:51:05 +0200 |
|---|---|---|
| committer | Wolfgang Denk | 2013-06-24 22:24:29 +0200 |
| commit | 186f9c130faa3e228b0db7f45de359748f78b1c3 (patch) | |
| tree | e61476e4d6495ff9f025b70a3035b72971f98c32 /board | |
| parent | e1208c2fe5e07f9a248cfbf9bbb212aa34ad2806 (diff) | |
ac14xx: fix a potential NULL deref in diagnostics
getenv() immediately after setenv() may perfectly legally return NULL, so
make sure to not deference an invalid pointer when creating diagnostic output
Signed-off-by: Gerhard Sittig <gsi@denx.de>
Diffstat (limited to 'board')
| -rw-r--r-- | board/ifm/ac14xx/ac14xx.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/board/ifm/ac14xx/ac14xx.c b/board/ifm/ac14xx/ac14xx.c index 74425912d62..f200b45f10f 100644 --- a/board/ifm/ac14xx/ac14xx.c +++ b/board/ifm/ac14xx/ac14xx.c @@ -209,6 +209,7 @@ static int read_eeprom(void) int mac_read_from_eeprom(void) { const u8 *mac; + const char *mac_txt; if (read_eeprom()) { printf("I2C EEPROM read failed.\n"); @@ -230,8 +231,11 @@ int mac_read_from_eeprom(void) if (mac && is_valid_ether_addr(mac)) { eth_setenv_enetaddr("ethaddr", mac); - printf("DIAG: %s() MAC value [%s]\n", - __func__, getenv("ethaddr")); + mac_txt = getenv("ethaddr"); + if (mac_txt) + printf("DIAG: MAC value [%s]\n", mac_txt); + else + printf("DIAG: failed to setup MAC env\n"); } return 0; |