From: Navid Emamdoost <navid.emamdoost@gmail.com>
Date: Fri, 22 Nov 2019 22:17:56 +0000 (-0600)
Subject: sctp: Fix memory leak in sctp_sf_do_5_2_4_dupcook
X-Git-Tag: android-x86-9.0-r1~4^2~67^2~38
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=681e08498e5e7e051ba1fedf815509f56ef31c4f;p=android-x86%2Fkernel.git

sctp: Fix memory leak in sctp_sf_do_5_2_4_dupcook

[ 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 <navid.emamdoost@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 713a669d2058..559f09ac0b22 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -2175,8 +2175,10 @@ 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;