crypto: talitos - Avoid consecutive packets going out with same IV

The SEC's h/w IV out implementation DMAs the trailing encrypted payload
block of the last encryption to ctx->iv.  Since the last encryption may
still be pending completion, we can sufficiently prevent successive
packets from being transmitted with the same IV by xoring with sequence
number.

Also initialize alg_list earlier to prevent oopsing on a failed probe.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Lee Nipper <lee.nipper@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index ee827a7f7c6a..b6ad3ac5916e 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -1157,6 +1157,8 @@ static int aead_authenc_givencrypt(
         edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
 
         memcpy(req->giv, ctx->iv, crypto_aead_ivsize(authenc));
+        /* avoid consecutive packets going out with same IV */
+        *(__be64 *)req->giv ^= cpu_to_be64(req->seq);
 
         return ipsec_esp(edesc, areq, req->giv, req->seq,
                          ipsec_esp_encrypt_done);
@@ -1449,6 +1451,8 @@ static int talitos_probe(struct of_device *ofdev,
 
         priv->ofdev = ofdev;
 
+        INIT_LIST_HEAD(&priv->alg_list);
+
         tasklet_init(&priv->done_task, talitos_done, (unsigned long)dev);
         tasklet_init(&priv->error_task, talitos_error, (unsigned long)dev);
 
@@ -1575,8 +1579,6 @@ static int talitos_probe(struct of_device *ofdev,
         }
 
         /* register crypto algorithms the device supports */
-        INIT_LIST_HEAD(&priv->alg_list);
-
         for (i = 0; i < ARRAY_SIZE(driver_algs); i++) {
                 if (hw_supports(dev, driver_algs[i].desc_hdr_template)) {
                         struct talitos_crypto_alg *t_alg;