| Message ID | 20241122123558.74702-1-jerome.forissier@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | net: lwip: fix dhcp_loop() | expand |
On Fri, 22 Nov 2024 at 14:36, Jerome Forissier <jerome.forissier@linaro.org> wrote: > > The local variables ipstr, maskstr and gwstr in static function > dhcp_loop() 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 at linaro.org> @ But I guess we can fix that up during merging Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> > Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org> > --- > net/lwip/dhcp.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/net/lwip/dhcp.c b/net/lwip/dhcp.c > index 23b56226921..bfc72ca6c57 100644 > --- a/net/lwip/dhcp.c > +++ b/net/lwip/dhcp.c > @@ -27,9 +27,9 @@ static void call_lwip_dhcp_fine_tmr(void *ctx) > > static int dhcp_loop(struct udevice *udev) > { > - 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"; > unsigned long start; > struct netif *netif; > struct dhcp *dhcp; > -- > 2.43.0 >
On 11/22/24 13:37, Ilias Apalodimas wrote: > On Fri, 22 Nov 2024 at 14:36, Jerome Forissier > <jerome.forissier@linaro.org> wrote: >> >> The local variables ipstr, maskstr and gwstr in static function >> dhcp_loop() 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 at linaro.org> > > @ > But I guess we can fix that up during merging Sorry about that. Bad copy/paste from the ML web page ;)
diff --git a/net/lwip/dhcp.c b/net/lwip/dhcp.c index 23b56226921..bfc72ca6c57 100644 --- a/net/lwip/dhcp.c +++ b/net/lwip/dhcp.c @@ -27,9 +27,9 @@ static void call_lwip_dhcp_fine_tmr(void *ctx) static int dhcp_loop(struct udevice *udev) { - 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"; unsigned long start; struct netif *netif; struct dhcp *dhcp;
The local variables ipstr, maskstr and gwstr in static function dhcp_loop() 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 at linaro.org> Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org> --- net/lwip/dhcp.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)