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routing: plug mbuf leak for the packets hitting IPv6 blackhole route

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Reported by:	Dmitriy Smirnov <fox@sage.su>
Tested by:	Dmitriy Smirnov <fox@sage.su>
MFC after:	1 day
This commit is contained in:
Alexander V. Chernikov 2023-05-17 09:06:04 +00:00
parent 4c63ecf5c7
commit b50e1465e8
1 changed files with 6 additions and 3 deletions
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9
sys/netinet6/ip6_forward.c
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@ -198,9 +198,12 @@ ip6_forward(struct mbuf *m, int srcrt)
if (nh->nh_flags & (NHF_BLACKHOLE | NHF_REJECT)) {
IP6STAT_INC(ip6s_cantforward);
if ((nh->nh_flags & NHF_REJECT) && (mcopy != NULL)) {
icmp6_error(mcopy, ICMP6_DST_UNREACH,
ICMP6_DST_UNREACH_REJECT, 0);
if (mcopy != NULL) {
if (nh->nh_flags & NHF_REJECT) {
icmp6_error(mcopy, ICMP6_DST_UNREACH,
ICMP6_DST_UNREACH_REJECT, 0);
} else
m_freem(mcopy);
}
goto bad;
}