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net: if: Make sure iface->if_dev is not null when accessing L2

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commit 971ae59913 ("net: pkt: Make sure iface is not null when
accessing L2") fixed net_if_l2 where iface was NULL, however if
iface->if_dev is NULL, the check breaks and returns an offset of
NULL (0x82 or so).  This is incorrect.

Let's add a check for iface->if_dev as well.

Signed-off-by: Michael Scott <mike@foundries.io>
This commit is contained in:
Michael Scott 2020-01-24 11:41:54 -08:00 • committed by Jukka Rissanen
commit 407ceeee6d
1 changed files with 1 additions and 1 deletions
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include/net/net_if.h
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@ -550,7 +550,7 @@ enum net_verdict net_if_send_data(struct net_if *iface, struct net_pkt *pkt);
*/ */
static inline const struct net_l2 * const net_if_l2(struct net_if *iface) static inline const struct net_l2 * const net_if_l2(struct net_if *iface)
{ {
if (!iface) { if (!iface || !iface->if_dev) {
return NULL; return NULL;
} }