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test/dm: Fix string handling issues in the eth test

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Coverity scan has identified potential buffer overruns in these tests.
Correct this by zeroing our buffer and using strncpy not strcpy.

Reported-by: Coverity (CID: 155462, 155463)
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Tom Rini 2017-09-26 14:08:30 -04:00
parent d91062c41e
commit e2e6daed5a
1 changed files with 5 additions and 3 deletions

8
test/dm/eth.c
View file

@ -110,6 +110,7 @@ static int dm_test_eth_act(struct unit_test_state *uts)
char ethaddr[DM_TEST_ETH_NUM][18];
int i;
memset(ethaddr, '\0', sizeof(ethaddr));
net_ping_ip = string_to_ip("1.1.2.2");
/* Prepare the test scenario */
@ -119,7 +120,7 @@ static int dm_test_eth_act(struct unit_test_state *uts)
ut_assertok(device_remove(dev[i], DM_REMOVE_NORMAL));
/* Invalidate MAC address */
strcpy(ethaddr[i], env_get(addrname[i]));
strncpy(ethaddr[i], env_get(addrname[i]), 17);
/* Must disable access protection for ethaddr before clearing */
env_set(".flags", addrname[i]);
env_set(addrname[i], NULL);
@ -187,7 +188,8 @@ static int dm_test_eth_rotate(struct unit_test_state *uts)
net_ping_ip = string_to_ip("1.1.2.2");
/* Invalidate eth1's MAC address */
strcpy(ethaddr, env_get("eth1addr"));
memset(ethaddr, '\0', sizeof(ethaddr));
strncpy(ethaddr, env_get("eth1addr"), 17);
/* Must disable access protection for eth1addr before clearing */
env_set(".flags", "eth1addr");
env_set("eth1addr", NULL);
@ -200,7 +202,7 @@ static int dm_test_eth_rotate(struct unit_test_state *uts)
if (!retval) {
/* Invalidate eth0's MAC address */
strcpy(ethaddr, env_get("ethaddr"));
strncpy(ethaddr, env_get("ethaddr"), 17);
/* Must disable access protection for ethaddr before clearing */
env_set(".flags", "ethaddr");
env_set("ethaddr", NULL);