sctp: Fix memory leak in sctp_sf_do_5_2_4_dupcook

In the implementation of sctp_sf_do_5_2_4_dupcook() the allocated
new_asoc is leaked if security_sctp_assoc_request() fails. Release it
via sctp_association_free().

Fixes: 2277c7cd75e3 ("sctp: Add LSM hooks")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>

diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 0c21c52..4ab8208 100644 (file)
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -2160,8 +2160,10 @@ enum sctp_disposition sctp_sf_do_5_2_4_dupcook(
 
        /* Update socket peer label if first association. */
        if (security_sctp_assoc_request((struct sctp_endpoint *)ep,
-                                       chunk->skb))
+                                       chunk->skb)) {
+               sctp_association_free(new_asoc);
                return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
+       }
 
        /* Set temp so that it won't be added into hashtable */
        new_asoc->temp = 1;