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zebra: Fix crash on macvlan link down/up

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Whenever a link up change was detected on a macvlan device where
the linked device wasn't visible in the namespace zebra was
running in, the linked zebra interface was NULL. This was already
handled in the event of a link down, but was ommitted from the
upside. Added the same null check to the up-side.

Signed-off-by: Tomi Salminen <tlsalmin@gmail.com>
(cherry picked from commit bdf6a9ba81)
This commit is contained in:
Tomi Salminen 2023-12-13 11:37:21 +02:00 committed by Mergify
parent 2b259ac16c
commit d015570b50
1 changed files with 9 additions and 0 deletions
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9
zebra/zebra_vxlan.c
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@ -5116,6 +5116,15 @@ void zebra_vxlan_macvlan_up(struct interface *ifp)
return;
link_ifp = zif->link;
if (!link_ifp) {
if (IS_ZEBRA_DEBUG_VXLAN)
zlog_debug(
"macvlan parent link is not found. Parent index %d ifp %s",
zif->link_ifindex,
ifindex2ifname(zif->link_ifindex,
ifp->vrf->vrf_id));
return;
}
link_zif = link_ifp->info;
assert(link_zif);