net: lwip: fix get_udev_ipv4_info()
The local variables ipstr, maskstr and gwstr in static function
get_udev_ipv4_info() cannot be pointers to read-only data, since
they may be written to in case the device index is > 0. Therefore
make them char arrays allocated on the stack.
Reported-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reported-by: Adriano Cordova <adrianox@gmail.com>
Link: https://lists.denx.de/pipermail/u-boot/2024-November/572066.html
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/net/lwip/net-lwip.c b/net/lwip/net-lwip.c
index 4702177..b863047 100644
--- a/net/lwip/net-lwip.c
+++ b/net/lwip/net-lwip.c
@@ -91,9 +91,9 @@
static int get_udev_ipv4_info(struct udevice *dev, ip4_addr_t *ip,
ip4_addr_t *mask, ip4_addr_t *gw)
{
- char *ipstr = "ipaddr\0\0";
- char *maskstr = "netmask\0\0";
- char *gwstr = "gatewayip\0\0";
+ char ipstr[] = "ipaddr\0\0";
+ char maskstr[] = "netmask\0\0";
+ char gwstr[] = "gatewayip\0\0";
int idx = dev_seq(dev);
char *env;