git: b3cfe07d74a9 - releng/13.0 - When we are about to send down to the driver layer we need to make sure that the m_nextpkt field is NULL else the lower layers may do unwanted things.

[Alexander V. Chernikov]

The branch releng/13.0 has been updated by melifaro:

URL: https://cgit.FreeBSD.org/src/commit/?id=b3cfe07d74a9ee4b726e2333ff327d154181572d

commit b3cfe07d74a9ee4b726e2333ff327d154181572d
Author:     Randall Stewart <rrs at FreeBSD.org>
AuthorDate: 2021-02-15 20:39:11 +0000
Commit:     Alexander V. Chernikov <melifaro at FreeBSD.org>
CommitDate: 2021-02-15 20:39:11 +0000

    When we are about to send down to the driver layer
    we need to make sure that the m_nextpkt field is NULL
    else the lower layers may do unwanted things.
    
    Approved by:    re(gjb)
    Reviewed By:  gallatin, melifaro
    Differential Revision: https://reviews.freebsd.org/D28377
    
    (cherry picked from commit 538a81520b557f9964c5ebe912f9dff5996bed56)
---
 sys/netinet6/nd6.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/netinet6/nd6.c b/sys/netinet6/nd6.c
index 386eb7cca922..497c0bfc10e8 100644
--- a/sys/netinet6/nd6.c
+++ b/sys/netinet6/nd6.c
@@ -2460,6 +2460,7 @@ nd6_flush_holdchain(struct ifnet *ifp, struct mbuf *chain,
 	while (m_head) {
 		m = m_head;
 		m_head = m_head->m_nextpkt;
+		m->m_nextpkt = NULL;
 		error = nd6_output_ifp(ifp, ifp, m, dst, NULL);
 	}