linux-kernel - [PATCH] crypto: obscure state information on free

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Message-ID: <20080811202607.GA11527@hmsreliant.think-freely.org>
Date:	Mon, 11 Aug 2008 16:26:07 -0400
From:	Neil Horman <nhorman@...driver.com>
To:	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	nhorman@...driver.com, herbert@...dor.apana.org.au,
	davem@...emloft.net
Subject: [PATCH] crypto: obscure state information on free

Patch to obscure state information on free in prng code.  Keeps prying eyes from
sifting through your trash :)

Regards
Neil

Signed-off-by: Neil Horman <nhorman@...driver.com>


 prng.c |    1 +
 1 file changed, 1 insertion(+)


diff --git a/crypto/prng.c b/crypto/prng.c
index b203093..fc6fa28 100644
--- a/crypto/prng.c
+++ b/crypto/prng.c
@@ -296,6 +296,7 @@ EXPORT_SYMBOL_GPL(alloc_prng_context);
 void free_prng_context(struct prng_context *ctx)
 {
 	crypto_free_cipher(ctx->tfm);
+	memset(ctx, 0, sizeof(struct prng_context));
 	kfree(ctx);
 }
 EXPORT_SYMBOL_GPL(free_prng_context);
-- 
/****************************************************
 * Neil Horman <nhorman@...driver.com>
 * Software Engineer, Red Hat
 ****************************************************/
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