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bgpd: fix dereference of null pointer in bgp_attr_aspath

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The peer pointer theorically have a NULL bgp pointer. This triggers
a SA issue. So let us fix it.

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
This commit is contained in:
Philippe Guibert 2023-02-03 09:41:41 +01:00
parent f7b60a3a1f
commit 629d84f512
1 changed files with 2 additions and 1 deletions
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3
bgpd/bgp_attr.c
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@ -1633,7 +1633,8 @@ static int bgp_attr_aspath(struct bgp_attr_parser_args *args)
* such messages, conformant BGP speakers SHOULD use the "Treat-as-
* withdraw" error handling behavior as per [RFC7606].
*/
if (peer->bgp->reject_as_sets && aspath_check_as_sets(attr->aspath)) {
if (peer->bgp && peer->bgp->reject_as_sets &&
aspath_check_as_sets(attr->aspath)) {
flog_err(EC_BGP_ATTR_MAL_AS_PATH,
"AS_SET and AS_CONFED_SET are deprecated from %pBP",
peer);