If using an usb ethernet interface and starting usb is forgot,
any attempt to use ethernet will try to init networking and dereference
eth_get_dev() to null.
This patch adds a check and aborts in case of a null pointer.
---
net/net.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/net/net.c b/net/net.c
index 82c4cc9..1301e6b 100644
--- a/net/net.c
+++ b/net/net.c
@@ -313,6 +313,17 @@ int NetLoop(enum proto_t protocol)
NetTryCount = 1;
debug_cond(DEBUG_INT_STATE, "--- NetLoop Entry\n");
+ /* If we do not check, initialisation will dereference NULL */
+ if (!eth_get_dev())
+ {
+#ifdef CONFIG_USB_HOST_ETHER
+ printf("Ethernet not available. Have you run \"usb start\"
already?\n");
+#else
+ printf("Ethernet not available.\n");
+#endif
+ return -1;
+ }
+
bootstage_mark_name(BOOTSTAGE_ID_ETH_START, "eth_start");
net_init();
if (eth_is_on_demand_init() || protocol != NETCONS) {
--
1.8.0
--
_____________________________________________________________
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Woelkestrasse 11
D-85301 Schweitenkirchen
Fon: +49 8444 9204-0
Fax: +49 8444 9204-50
www.rsi-elektrotechnik.de
_____________________________________________________________
Amtsgericht Ingolstadt - GmbH: HRB 191328 - KG: HRA 170363
Geschäftsführer: Dr.-Ing. Michael Sorg, Dipl.-Ing. Franz Sorg
USt-IdNr.: DE 128592548
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