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zebra: prevent crash in evpn if cleanup

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zebra crash is seen while cleaning up evpn interface
during shutdown event.
evpn interface clean up is called from vrf_delete callback

(gdb) frame 4
(is_up=false, br_zif=0x0, vlan_zif=0x557f31fb36f0) at zebra/zebra_evpn_mh.c:614
614     zebra/zebra_evpn_mh.c: No such file or directory.
(gdb) p tmp_br_zif
$1 = (struct zebra_if *) 0x0
(gdb) p vlan_zif->link
$2 = (struct interface *) 0x557f31fb2d40
(gdb) p vlan_zif->link->info
$3 = (void *) 0x0
(gdb) p zebra_if->ifp->name
No symbol "zebra_if" in current context.
(gdb) p vlan_zif->ifp->name
$4 = "peerlink-3.4094\000\000\000\000"

Ticket:CM-32435
Reviewed By:CCR-10957
Testing Done:

Signed-off-by: Chirag Shah <chirag@nvidia.com>
This commit is contained in:
Chirag Shah 2020-11-24 12:22:49 -08:00 committed by Anuradha Karuppiah
parent 243b74eda6
commit 3b63732a42
1 changed files with 1 additions and 1 deletions
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2
zebra/zebra_evpn_mh.c
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@ -609,7 +609,7 @@ void zebra_evpn_acc_bd_svi_set(struct zebra_if *vlan_zif,
struct zebra_if *tmp_br_zif = br_zif;
if (!tmp_br_zif) {
if (!vlan_zif->link)
if (!vlan_zif->link || !vlan_zif->link->info)
return;
tmp_br_zif = vlan_zif->link->info;