git: be1fb99a727b - stable/12 - 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 stable/12 has been updated by melifaro:

URL: https://cgit.FreeBSD.org/src/commit/?id=be1fb99a727b784781f7d8d95bb6f14707e2d886

commit be1fb99a727b784781f7d8d95bb6f14707e2d886
Author:     Randall Stewart <rrs at FreeBSD.org>
AuthorDate: 2021-01-27 18:32:52 +0000
Commit:     Alexander V. Chernikov <melifaro at FreeBSD.org>
CommitDate: 2021-04-18 14:54:14 +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.
    
    Reviewed By:  gallatin, melifaro
    Differential Revision: https://reviews.freebsd.org/D28377
    PR:     253587
    
    (cherry picked from commit 24a8f6d369962f189ad808f538029179b1e7dc2f)
---
 sys/netinet6/nd6.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/netinet6/nd6.c b/sys/netinet6/nd6.c
index d1d4b7c7fa88..0a654fbd06e6 100644
--- a/sys/netinet6/nd6.c
+++ b/sys/netinet6/nd6.c
@@ -2446,6 +2446,7 @@ 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);
 	}