Date: Wed, 21 Jan 2026 14:11:45 +0000 From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 3fdfc6c77aad - stable/14 - ipv6: account for jumbo payload option Message-ID: <6970dea1.227f6.54c824cf@gitrepo.freebsd.org>
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The branch stable/14 has been updated by tuexen: URL: https://cgit.FreeBSD.org/src/commit/?id=3fdfc6c77aad8eacce0a8e609cc435db1070d726 commit 3fdfc6c77aad8eacce0a8e609cc435db1070d726 Author: Michael Tuexen <tuexen@FreeBSD.org> AuthorDate: 2026-01-16 11:49:40 +0000 Commit: Michael Tuexen <tuexen@FreeBSD.org> CommitDate: 2026-01-21 14:05:01 +0000 ipv6: account for jumbo payload option If a jumbo payload option is added, the length of the mbuf chain is increased by 8 but the actual hop-by-hop extension header with the jumbo playload option is only inserted in the packet if there are other options. Therefore, adjust optlen to reflect the actual size of IPv6 extension headers including the hop-by-hop extension header containing the jumbo payload option. Reported by: syzbot+73fe316271df473230eb@syzkaller.appspotmail.com Reviewed by: markj, Timo Voelker Differential Revision: https://reviews.freebsd.org/D54394 (cherry picked from commit 1f5b1de1fdf2924066c1851ed6c73f36fe20b438) --- sys/netinet6/ip6_output.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sys/netinet6/ip6_output.c b/sys/netinet6/ip6_output.c index afc8b60e4cbe..10569b7d1026 100644 --- a/sys/netinet6/ip6_output.c +++ b/sys/netinet6/ip6_output.c @@ -584,6 +584,7 @@ no_ipsec:; if ((error = ip6_insert_jumboopt(&exthdrs, plen)) != 0) goto freehdrs; ip6->ip6_plen = 0; + optlen += 8; /* JUMBOOPTLEN */ } else ip6->ip6_plen = htons(plen); nexthdrp = &ip6->ip6_nxt;home | help
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