netdev - Re: [v2 PATCH 13/13] crypto: algif_aead

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Date:	Tue, 26 May 2015 14:24:33 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephan Mueller <smueller@...onox.de>
Cc:	Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Johannes Berg <johannes@...solutions.net>,
	Marcel Holtmann <marcel@...tmann.org>,
	Steffen Klassert <steffen.klassert@...unet.com>
Subject: Re: [v2 PATCH 13/13] crypto: algif_aead - Switch to new AEAD
 interface

On Mon, May 25, 2015 at 07:53:41PM +0800, Herbert Xu wrote:
> On Mon, May 25, 2015 at 01:50:55PM +0200, Stephan Mueller wrote:
> >
> > When you have my code local, simply execute libkcapi/test/kcapi -y twice or 
> > three times. That triggered the crash.
> 
> Aha that's what I was missing.  I'll look into the crash.

OK I forgot to initialise the SG list.  This patch fixes it for me.

diff --git a/crypto/algif_aead.c b/crypto/algif_aead.c
index 1d08483..35556a6 100644
--- a/crypto/algif_aead.c
+++ b/crypto/algif_aead.c
@@ -454,6 +454,7 @@ static int aead_recvmsg(struct socket *sock, struct msghdr *msg, size_t ignored,
 	if (usedpages < outlen)
 		goto unlock;
 
+	sg_init_table(dstbuf, ALG_MAX_PAGES + 1);
 	sg_mark_end(sgl->sg + sgl->cur);
 	assoclen = ctx->aead_assoclen;
 	/*
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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