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bgpd: delete_vin_type2_route may free dest

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The dest pointer may be freed( but should not be
due to locking ).  Let's ensure that this assumption
is true and make coverity happy.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>
This commit is contained in:
Donald Sharp 2023-09-10 09:15:41 -04:00
parent f491b54079
commit 8d39c8c927
1 changed files with 14 additions and 7 deletions
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21
bgpd/bgp_evpn.c
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@ -2578,7 +2578,8 @@ static void delete_global_type2_routes(struct bgp *bgp, struct bgpevpn *vpn)
}
}
static void delete_vni_type2_route(struct bgp *bgp, struct bgp_dest *dest)
static struct bgp_dest *delete_vni_type2_route(struct bgp *bgp,
struct bgp_dest *dest)
{
struct bgp_path_info *pi;
afi_t afi = AFI_L2VPN;
@ -2588,13 +2589,15 @@ static void delete_vni_type2_route(struct bgp *bgp, struct bgp_dest *dest)
(const struct prefix_evpn *)bgp_dest_get_prefix(dest);
if (evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE)
return;
return dest;
delete_evpn_route_entry(bgp, afi, safi, dest, &pi);
/* Route entry in local table gets deleted immediately. */
if (pi)
bgp_path_info_reap(dest, pi);
dest = bgp_path_info_reap(dest, pi);
return dest;
}
static void delete_vni_type2_routes(struct bgp *bgp, struct bgpevpn *vpn)
@ -2605,12 +2608,16 @@ static void delete_vni_type2_routes(struct bgp *bgp, struct bgpevpn *vpn)
* routes.
*/
for (dest = bgp_table_top(vpn->mac_table); dest;
dest = bgp_route_next(dest))
delete_vni_type2_route(bgp, dest);
dest = bgp_route_next(dest)) {
dest = delete_vni_type2_route(bgp, dest);
assert(dest);
}
for (dest = bgp_table_top(vpn->ip_table); dest;
dest = bgp_route_next(dest))
delete_vni_type2_route(bgp, dest);
dest = bgp_route_next(dest)) {
dest = delete_vni_type2_route(bgp, dest);
assert(dest);
}
}
/*