linux-kernel - [PATCH 3/8] Replace memset() with memzero

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Date:   Tue, 16 Nov 2021 19:30:39 +0800
From:   Sandy Harris <sandyinchina@...il.com>
To:     LKML <linux-kernel@...r.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 3/8] Replace memset() with memzero_explicit()

Replace memset(address,0,bytes) which may be optimised
away with memzero_explicit(address,bytes) which resists
such optimisation

---
 crypto/dh.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/dh.c b/crypto/dh.c
index cd4f32092e5c..ff7dc65b3b41 100644
--- a/crypto/dh.c
+++ b/crypto/dh.c
@@ -25,7 +25,7 @@ static void dh_clear_ctx(struct dh_ctx *ctx)
     mpi_free(ctx->q);
     mpi_free(ctx->g);
     mpi_free(ctx->xa);
-    memset(ctx, 0, sizeof(*ctx));
+    memzero_explicit(ctx, sizeof(*ctx));
 }

 /*
-- 
2.25.1