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: 2d97591 ("crypto: af_alg - consolidation of...") Cc: <[email protected]> Signed-off-by: Herbert Xu <[email protected]> Reviewed-by: Stephan Mueller <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
Stilmant · Jun 15, 2020 · 7cf8195 · 7cf8195
1 parent 9545926
commit 7cf8195
Showing 1 changed file with 1 addition and 5 deletions.
diff --git 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.