[PATCH 4.19 285/321] sctp: Fix memory leak in sctp_sf_do_5_2_4_dupcook

Greg Kroah-Hartman
2019-12-03T22:57:34Z

From: Navid Emamdoost <navid.emamdoost@gmail.com>

[ 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>
---
net/sctp/sm_statefuns.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- 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_d

/* 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;