Commit 269230e7 authored Jun 27, 2011 by Herbert Xu

crypto: algif_hash - Handle initial af_alg_make_sg error correctly



When the first call to af_alg_make_sg fails, we may return garbage
instead of the real error.  This patch fixes it by setting the error
if "copied" is zero.

Based on a patch by Jesper Juhl.

Reported-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

parent 36ca239b

crypto/algif_hash.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -68,8 +68,10 @@ static int hash_sendmsg(struct kiocb unused, struct socket sock,
		int newlen;

		newlen = af_alg_make_sg(&ctx->sgl, from, len, 0);
		if (newlen < 0)
		if (newlen < 0) {
		err = copied ? 0 : newlen;
		goto unlock;
		}

		ahash_request_set_crypt(&ctx->req, ctx->sgl.sg, NULL,
		newlen);