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-rw-r--r--include/net/sctp/structs.h8
-rw-r--r--net/sctp/sm_make_chunk.c2
2 files changed, 9 insertions, 1 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index ad3d15cb0a0..8c522ae031b 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -1250,6 +1250,14 @@ struct sctp_endpoint {
int last_key;
int key_changed_at;
+ /* digest: This is a digest of the sctp cookie. This field is
+ * only used on the receive path when we try to validate
+ * that the cookie has not been tampered with. We put
+ * this here so we pre-allocate this once and can re-use
+ * on every receive.
+ */
+ __u8 digest[SCTP_SIGNATURE_SIZE];
+
/* sendbuf acct. policy. */
__u32 sndbuf_policy;
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 4fe1d6c863b..5e0de3c0eea 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1359,7 +1359,7 @@ struct sctp_association *sctp_unpack_cookie(
struct sctp_signed_cookie *cookie;
struct sctp_cookie *bear_cookie;
int headersize, bodysize, fixed_size;
- __u8 digest[SCTP_SIGNATURE_SIZE];
+ __u8 *digest = ep->digest;
struct scatterlist sg;
unsigned int keylen, len;
char *key;