Subject: [PATCH 09/23] sctp: Fix memory leak in sctp_sf_do_5_2_4_dupcook

From: Navid Emamdoost <[email-masked]>
Date: Fri, 22 Nov 2019 16:17:56 -0600

[ Upstream commit b6631c6031c746ed004c4221ec0616d7a520f441 ]

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 <[email-masked]>
Acked-by: Marcelo Ricardo Leitner <[email-masked]>
Signed-off-by: Jakub Kicinski <[email-masked]>
---
 net/sctp/sm_statefuns.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 2c244b29a199..9eeea0d8e4cf 100644
--- 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;
-- 
2.20.1