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Commit b3ad0cdb authored by Herbert Xu's avatar Herbert Xu Committed by Greg Kroah-Hartman
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crypto: algif_skcipher - Cap recv SG list at ctx->used 



commit 7cf81954705b7e5b057f7dc39a7ded54422ab6e1 upstream.

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: 2d97591e ("crypto: af_alg - consolidation of...")
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: default avatarStephan Mueller <smueller@chronox.de>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d9d3352c

crypto/algif_skcipher.c

+1 −5
Original line number Diff line number Diff line
@@ -78,14 +78,10 @@ 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.