Author: tuexen
Date: Sun Jun 28 14:11:36 2020
New Revision: 362722
URL: https://svnweb.freebsd.org/changeset/base/362722
Log:
Don't send packets containing ERROR chunks in response to unknown
chunks when being in a state where the verification tag to be used
is not known yet.
MFC after: 1 week
Modified:
head/sys/netinet/sctp_input.c
Modified: head/sys/netinet/sctp_input.c
==============================================================================
--- head/sys/netinet/sctp_input.c Sun Jun 28 14:02:49 2020
(r362721)
+++ head/sys/netinet/sctp_input.c Sun Jun 28 14:11:36 2020
(r362722)
@@ -5178,7 +5178,11 @@ process_control_chunks:
default:
unknown_chunk:
/* it's an unknown chunk! */
- if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
+ if ((ch->chunk_type & 0x40) &&
+ (stcb != NULL) &&
+ (SCTP_GET_STATE(stcb) != SCTP_STATE_EMPTY) &&
+ (SCTP_GET_STATE(stcb) != SCTP_STATE_INUSE) &&
+ (SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT)) {
struct sctp_gen_error_cause *cause;
int len;
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