sctp: improve handling of address changes

Identify interfaces consistenly by the pair of the ifn pointer
and the index.
This avoids a use after free when the ifn and or index was reused.

Reported by:	bz, pho, and others

(cherry picked from commit 523913c94371ab50a8129cbab820394d25f7a269)

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/netinet/sctp_pcb.h b/sys/netinet/sctp_pcb.h
index 7ef6feee9c01..ce38e7cede2d 100644
--- a/sys/netinet/sctp_pcb.h
+++ b/sys/netinet/sctp_pcb.h
@@ -497,7 +497,7 @@ void sctp_free_ifa(struct sctp_ifa *sctp_ifap);
 
 void
 sctp_del_addr_from_vrf(uint32_t vrfid, struct sockaddr *addr,
-    uint32_t ifn_index);
+    void *ifn, uint32_t ifn_index);
 
 struct sctp_nets *sctp_findnet(struct sctp_tcb *, struct sockaddr *);