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a4559740ea
Description:
aggregate member route was enqueued for recalculation
while bgp instance was deleted.
As part of aggregate member route deletion, the aggregate route is
reinstalled with self-peer as source, but self-peer is already removed.
Assert() for null peer pointer is path attribute aborts bgp.
Problem Description/Summary :
BGP crashed while cleaning up aggregate route as part of bgp instance deletion.
-----------------------
Leaf-4(config)#
Leaf-4(config)# no router bgp 65179 vrf Vrf-red
Leaf-4(config)# no router bgp 65179
Leaf-4(config)#
Leaf-4(config)#
Leaf-4(config)# root@Leaf-4:~#
Sep 26 15:38:21.257554 System is not ready - Core services are down
------------
router bgp 65179
bgp router-id 100.2.0.3
no bgp default ipv4-unicast
bgp network import-check
neighbor LeafToHostv4 peer-group
neighbor LeafToHostv4 remote-as 65003
neighbor LeafToHostv6 peer-group
neighbor LeafToHostv6 remote-as 65003
neighbor LeafToSpinev4 peer-group
neighbor LeafToSpinev4 remote-as 65134
neighbor LeafToSpinev4 bfd
neighbor LeafToSpinev6 peer-group
neighbor LeafToSpinev6 remote-as 65134
neighbor LeafToSpinev6 bfd
neighbor WindowsServer peer-group
neighbor WindowsServer remote-as 65201
neighbor 155.1.0.4 peer-group LeafToSpinev4
neighbor 155.2.0.4 peer-group LeafToSpinev4
neighbor 2000:155:1::4 peer-group LeafToSpinev6
neighbor 2000:155:2::4 peer-group LeafToSpinev6
neighbor 172.16.11.2 peer-group WindowsServer
neighbor 172.16.1.2 remote-as 65101
neighbor 2000:172:16:1::2 remote-as 65101
bgp listen limit 400
bgp listen range 133.3.0.0/16 peer-group LeafToHostv4
bgp listen range 2000:133:3::/48 peer-group LeafToHostv6
!
address-family ipv4 unicast
aggregate-address 133.1.0.0/16 as-set
aggregate-address 133.2.0.0/16 as-set
aggregate-address 133.3.0.0/16 as-set
aggregate-address 133.4.0.0/16 as-set
redistribute connected
neighbor LeafToHostv4 activate
neighbor LeafToSpinev4 activate
neighbor LeafToSpinev4 allowas-in 1
neighbor LeafToSpinev4 route-map spine_v4_export out
neighbor WindowsServer activate
neighbor 172.16.1.2 activate
exit-address-family
!
address-family ipv6 unicast
aggregate-address 2000:133:1::/48 as-set
aggregate-address 2000:133:2::/48 as-set
aggregate-address 2000:133:3::/48 as-set
aggregate-address 2000:133:4::/48 as-set
redistribute connected
..
------------
(gdb) bt
name=0x55607dd49090 <_FUNCTION_.23915> "bgp_path_info_add")
at bgpd/bgpd.c:1159
name=name@entry=0x55607dd49090 <_FUNCTION_.23915> "bgp_path_info_add",
peer=<optimized out>) at bgpd/bgpd.c:1158
pi=<optimized out>) at bgpd/bgp_route.c:313
afi=afi@entry=AFI_IP, safi=safi@entry=SAFI_UNICAST,
p=p@entry=0x55607f1c4e10, origin=<optimized out>, aspath=0x55607f4bc8a0,
community=<optimized out>, ecommunity=<optimized out>,
lcommunity=<optimized out>, atomic_aggregate=0 '\000',
aggregate=0x55607f1c4ee0) at bgpd/bgp_route.c:5926
aggr_p=<optimized out>, aggregate=<optimized out>, pi=0x55607f41f9f0,
safi=SAFI_UNICAST, afi=AFI_IP, bgp=0x55607eeba5d0) at bgpd/bgp_route.c:6385
del=del@entry=0x55607f41f9f0, afi=afi@entry=AFI_IP,
--Type <return> to continue, or q <return> to quit--
safi=safi@entry=SAFI_UNICAST) at bgpd/bgp_route.c:6446
pi=0x55607f41f9f0, peer=0x55607ef22c10, afi=AFI_IP, safi=SAFI_UNICAST)
at bgpd/bgp_route.c:2885
data=<optimized out>) at bgpd/bgp_route.c:4125
at lib/workqueue.c:291
at lib/thread.c:1540
at bgpd/bgp_main.c:498
(gdb) fr 5
name=name@entry=0x55607dd49090 <_FUNCTION_.23915> "bgp_path_info_add",
peer=<optimized out>) at bgpd/bgpd.c:1158
1158 bgpd/bgpd.c: No such file or directory.
(gdb) fr 10
pi=0x55607f41f9f0, peer=0x55607ef22c10, afi=AFI_IP, safi=SAFI_UNICAST)
at bgpd/bgp_route.c:2885
2885 bgpd/bgp_route.c: No such file or directory.
(gdb) p peer->lock
$2 = 210
(gdb) p peer->status
$3 = 8
(gdb)
(gdb) p bgp
$11 = (struct bgp *) 0x56121ba315d0
(gdb) p bgp->peer_self
$12 = (struct peer *) 0x0
(gdb) p bgp->name
$13 = 0x0
(gdb) p bgp->name_pretty
$14 = 0x56121bb046a0 "VRF default"
(gdb) p bgp->inst_type
$15 = BGP_INSTANCE_TYPE_DEFAULT
(gdb)
bgp_aggregate_install():
5920
5921 new = info_make(ZEBRA_ROUTE_BGP, BGP_ROUTE_AGGREGATE, 0,
5922 bgp->peer_self, attr, rn);
5923
5924 SET_FLAG(new->flags, BGP_PATH_VALID);
5925
5926 bgp_path_info_add(rn, new);
5927 bgp_process(bgp, rn, afi, safi);
299 void bgp_path_info_add(struct bgp_node *rn, struct bgp_path_info *pi):
...
310
311 bgp_path_info_lock(pi);
312 bgp_lock_node(rn);
313 peer_lock(pi->peer); /* bgp_path_info peer reference */ <<< This points to bgp->peer_self = NULL
314 }
1573 #define peer_lock(B) peer_lock_with_caller(_FUNCTION_, (B))
1156 /* increase reference count on a struct peer */
1157 struct peer *peer_lock_with_caller(const char *name, struct peer *peer)
1158 {
1159 assert(peer && (peer->lock >= 0)); <<< asserted here
1160
Similar issue was fixed in community and we already have the fix:
https://github.com/FRRouting/frr/pull/4816
root@sr407497_lxc2:/home/ubuntu/frr_repo/frr/bgpd# git diff dfb6fd1dd119a5bd660012e940e8328534547e76~
|
||
|---|---|---|
| .github | ||
| alpine | ||
| babeld | ||
| bfdd | ||
| bgpd | ||
| debian | ||
| doc | ||
| docker | ||
| eigrpd | ||
| fpm | ||
| gdb | ||
| grpc | ||
| include | ||
| isisd | ||
| ldpd | ||
| lib | ||
| m4 | ||
| mlag | ||
| nhrpd | ||
| ospf6d | ||
| ospfclient | ||
| ospfd | ||
| pathd | ||
| pbrd | ||
| pimd | ||
| pkgsrc | ||
| python | ||
| qpb | ||
| redhat | ||
| ripd | ||
| ripngd | ||
| sharpd | ||
| snapcraft | ||
| staticd | ||
| tests | ||
| tools | ||
| vrrpd | ||
| vtysh | ||
| watchfrr | ||
| yang | ||
| zebra | ||
| .clang-format | ||
| .dir-locals.el | ||
| .dockerignore | ||
| .git-blame-ignore-revs | ||
| .gitignore | ||
| bootstrap.sh | ||
| buildtest.sh | ||
| changelog-auto.in | ||
| config.version.in | ||
| configure.ac | ||
| COPYING | ||
| COPYING-LGPLv2.1 | ||
| Makefile.am | ||
| README.md | ||
| stamp-h.in | ||
FRRouting
FRR is free software that implements and manages various IPv4 and IPv6 routing protocols. It runs on nearly all distributions of Linux and BSD and supports all modern CPU architectures.
FRR currently supports the following protocols:
- BGP
- OSPFv2
- OSPFv3
- RIPv1
- RIPv2
- RIPng
- IS-IS
- PIM-SM/MSDP
- LDP
- BFD
- Babel
- PBR
- OpenFabric
- VRRP
- EIGRP (alpha)
- NHRP (alpha)
Installation & Use
For source tarballs, see the releases page.
For Debian and its derivatives, use the APT repository at https://deb.frrouting.org/.
Instructions on building and installing from source for supported platforms may be found in the developer docs.
Once installed, please refer to the user guide for instructions on use.
Community
The FRRouting email list server is located here and offers the following public lists:
| Topic | List |
|---|---|
| Development | dev@lists.frrouting.org |
| Users & Operators | frog@lists.frrouting.org |
| Announcements | announce@lists.frrouting.org |
For chat, we currently use Slack. You can join by clicking the "Slack" link under the Participate section of our website.
Contributing
FRR maintains developer's documentation which contains the project workflow and expectations for contributors. Some technical documentation on project internals is also available.
We welcome and appreciate all contributions, no matter how small!
Security
To report security issues, please use our security mailing list:
security [at] lists.frrouting.org