crypto: algif_skcipher - Cap recv SG list at ctx->used

Somewhere along the line the cap on the SG list length for receive
was lost.  This patch restores it and removes the subsequent test
which is now redundant.

Fixes: 2d97591ef43d ("crypto: af_alg - consolidation of...")
Cc: <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index e2c8ab408bed528b3ca109add88b63f25fd0b3e1..4c3bdffe0c3a578bb49f7d51ab2ceb50655addca 100644 (file)
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -74,14 +74,10 @@ static int _skcipher_recvmsg(struct socket *sock, struct msghdr *msg,
                return PTR_ERR(areq);
 
        /* convert iovecs of output buffers into RX SGL */
-       err = af_alg_get_rsgl(sk, msg, flags, areq, -1, &len);
+       err = af_alg_get_rsgl(sk, msg, flags, areq, ctx->used, &len);
        if (err)
                goto free;
 
-       /* Process only as much RX buffers for which we have TX data */
-       if (len > ctx->used)
-               len = ctx->used;
-
        /*
         * If more buffers are to be expected to be processed, process only
         * full block size buffers.