Linux cryptographic layer development
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From: "Stephan Müller" <smueller@chronox.de>
To: herbert@gondor.apana.org.au
Cc: Stephen Rothwell <sfr@canb.auug.org.au>, linux-crypto@vger.kernel.org
Subject: [PATCH] crypto: algif_aead - fix uninitialized variable warning
Date: Thu, 08 Dec 2016 07:09:44 +0100	[thread overview]
Message-ID: <1660604.GQeZumkfIP@positron.chronox.de> (raw)

In case the user provided insufficient data, the code may return
prematurely without any operation. In this case, the processed
data indicated with outlen is zero.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Stephan Mueller <smueller@chronox.de>
---
 crypto/algif_aead.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/algif_aead.c b/crypto/algif_aead.c
index 2fbf239..e9c0993 100644
--- a/crypto/algif_aead.c
+++ b/crypto/algif_aead.c
@@ -420,7 +420,7 @@ static int aead_recvmsg_async(struct socket *sock, struct msghdr *msg,
 	unsigned int i, reqlen = GET_REQ_SIZE(tfm);
 	int err = -ENOMEM;
 	unsigned long used;
-	size_t outlen;
+	size_t outlen = 0;
 	size_t usedpages = 0;
 
 	lock_sock(sk);
-- 
2.9.3

             reply	other threads:[~2016-12-08  6:09 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-08  6:09 Stephan Müller [this message]
2016-12-08 12:17 ` [PATCH] crypto: algif_aead - fix uninitialized variable warning Herbert Xu

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