The branch main has been updated by tuexen:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=e010d20032c8c2a04da103b3402a8d24bd682dd5

commit e010d20032c8c2a04da103b3402a8d24bd682dd5
Author:     Michael Tuexen <tue...@freebsd.org>
AuthorDate: 2021-04-30 11:31:38 +0000
Commit:     Michael Tuexen <tue...@freebsd.org>
CommitDate: 2021-04-30 11:33:16 +0000

    sctp: update the vtag for INIT and INIT-ACK chunks
    
    This is needed in case of responding with an ABORT to an INIT-ACK.
---
 sys/netinet/sctputil.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/sys/netinet/sctputil.c b/sys/netinet/sctputil.c
index 5d4b3347a2c9..2c10ab158c83 100644
--- a/sys/netinet/sctputil.c
+++ b/sys/netinet/sctputil.c
@@ -4553,7 +4553,7 @@ sctp_handle_ootb(struct mbuf *m, int iphlen, int offset,
  * if there is return 1, else return 0.
  */
 int
-sctp_is_there_an_abort_here(struct mbuf *m, int iphlen, uint32_t *vtagfill)
+sctp_is_there_an_abort_here(struct mbuf *m, int iphlen, uint32_t *vtag)
 {
        struct sctp_chunkhdr *ch;
        struct sctp_init_chunk *init_chk, chunk_buf;
@@ -4574,12 +4574,13 @@ sctp_is_there_an_abort_here(struct mbuf *m, int iphlen, 
uint32_t *vtagfill)
                        /* yep, tell them */
                        return (1);
                }
-               if (ch->chunk_type == SCTP_INITIATION) {
+               if ((ch->chunk_type == SCTP_INITIATION) ||
+                   (ch->chunk_type == SCTP_INITIATION_ACK)) {
                        /* need to update the Vtag */
                        init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m,
-                           offset, sizeof(*init_chk), (uint8_t *)&chunk_buf);
+                           offset, sizeof(struct sctp_init_chunk), (uint8_t 
*)&chunk_buf);
                        if (init_chk != NULL) {
-                               *vtagfill = ntohl(init_chk->init.initiate_tag);
+                               *vtag = ntohl(init_chk->init.initiate_tag);
                        }
                }
                /* Nope, move to the next chunk */
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