matthieu/frr
1
0
Fork 0
forked from Mirror/frr
Code Pull requests Activity

ospf6d: fix possible crashes

Browse source 
OSPF6 instance may not exist when processing interface state change.
Do not execute processing steps that require an instance if an area is
not configured for an interface.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
This commit is contained in:
Igor Ryzhov 2021-05-25 21:58:55 +03:00
parent 7b4e9d3cfc
commit b4b6bd0017
1 changed files with 19 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

29
ospf6d/ospf6_interface.c
View file

@ -499,6 +499,9 @@ static int ospf6_interface_state_change(uint8_t next_state,
if (prev_state == next_state)
return -1;
if (!oi->area)
return -1;
/* log */
if (IS_OSPF6_DEBUG_INTERFACE) {
zlog_debug("Interface state change %s: %s -> %s",
@ -507,7 +510,8 @@ static int ospf6_interface_state_change(uint8_t next_state,
ospf6_interface_state_str[next_state]);
}
oi->state_change++;
ospf6 = ospf6_lookup_by_vrf_id(oi->interface->vrf_id);
ospf6 = oi->area->ospf6;
if ((prev_state == OSPF6_INTERFACE_DR
|| prev_state == OSPF6_INTERFACE_BDR)
@ -772,10 +776,8 @@ int interface_up(struct thread *thread)
return 0;
}
#endif /* __FreeBSD__ */
if (oi->area->ospf6)
ospf6 = oi->area->ospf6;
else
ospf6 = ospf6_lookup_by_vrf_id(oi->interface->vrf_id);
/* Join AllSPFRouters */
if (ospf6_sso(oi->interface->ifindex, &allspfrouters6, IPV6_JOIN_GROUP,
@ -890,13 +892,6 @@ int interface_down(struct thread *thread)
/* Stop trying to set socket options. */
THREAD_OFF(oi->thread_sso);
ospf6 = ospf6_lookup_by_vrf_id(oi->interface->vrf_id);
/* Leave AllSPFRouters */
if (oi->state > OSPF6_INTERFACE_DOWN)
ospf6_sso(oi->interface->ifindex, &allspfrouters6,
IPV6_LEAVE_GROUP, ospf6->fd);
ospf6_interface_state_change(OSPF6_INTERFACE_DOWN, oi);
for (ALL_LIST_ELEMENTS(oi->neighbor_list, node, nnode, on))
ospf6_neighbor_delete(on);
@ -907,6 +902,18 @@ int interface_down(struct thread *thread)
* DR election, as it is no longer valid. */
oi->drouter = oi->prev_drouter = htonl(0);
oi->bdrouter = oi->prev_bdrouter = htonl(0);
if (oi->area == NULL)
return 0;
ospf6 = oi->area->ospf6;
/* Leave AllSPFRouters */
if (oi->state > OSPF6_INTERFACE_DOWN)
ospf6_sso(oi->interface->ifindex, &allspfrouters6,
IPV6_LEAVE_GROUP, ospf6->fd);
ospf6_interface_state_change(OSPF6_INTERFACE_DOWN, oi);
return 0;
}