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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: 2d97591ef4 ("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>
This commit is contained in:
Herbert Xu 2020-05-29 14:54:43 +10:00
parent 95459261c9
commit 7cf8195470
1 changed files with 1 additions and 5 deletions
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6
crypto/algif_skcipher.c
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@ -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.