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bgpd: fix bgpd core when unintern attr

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When the remote peer is neither EBGP nor confed, aspath is the
shadow copy of attr->aspath in bgp_packet_attribute(). Striping
AS4_PATH should not be done on the aspath directly, since
that would lead to bgpd core dump when unintern the attr.

Signed-off-by: Yuan Yuan <yyuanam@amazon.com>
This commit is contained in:
Yuan Yuan 2023-05-30 18:53:32 +00:00
parent 147c7a2de3
commit 32af4995aa
1 changed files with 4 additions and 0 deletions
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4
bgpd/bgp_attr.c
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@ -4682,6 +4682,10 @@ bgp_size_t bgp_packet_attribute(struct bgp *bgp, struct peer *peer,
* there! (JK)
* Folks, talk to me: what is reasonable here!?
*/
/* Make sure dup aspath before the modification */
if (aspath == attr->aspath)
aspath = aspath_dup(attr->aspath);
aspath = aspath_delete_confed_seq(aspath);
stream_putc(s,