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isisd: fix potential access to NULL pointer in isis_route_update

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Fix potential access to NULL pointer in isis_route_update even if it is
not related with the fast-reroute implementation.

Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>
This commit is contained in:
Louis Scalbert 2022-07-13 11:01:11 +02:00
parent 1d5185eccb
commit acc0029779
1 changed files with 6 additions and 4 deletions
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10
isisd/isis_route.c
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@ -492,8 +492,9 @@ static void isis_route_update(struct isis_area *area, struct prefix *prefix,
isis_route_remove_previous_sid(area, prefix, route_info);
/* Install route. */
isis_zebra_route_add_route(area->isis, prefix, src_p,
route_info);
if (area)
isis_zebra_route_add_route(area->isis, prefix, src_p,
route_info);
/* Install/reinstall Prefix-SID label. */
if (route_info->sr.present)
isis_zebra_prefix_sid_install(area, prefix, route_info,
@ -508,8 +509,9 @@ static void isis_route_update(struct isis_area *area, struct prefix *prefix,
isis_zebra_prefix_sid_uninstall(
area, prefix, route_info, &route_info->sr);
/* Uninstall route. */
isis_zebra_route_del_route(area->isis, prefix, src_p,
route_info);
if (area)
isis_zebra_route_del_route(area->isis, prefix, src_p,
route_info);
hook_call(isis_route_update_hook, area, prefix, route_info);
UNSET_FLAG(route_info->flag, ISIS_ROUTE_FLAG_ZEBRA_SYNCED);