linux-kernel - [PATCH 4/8] Replace memset() with memzero

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Message-ID: <CACXcFmmyTXg77Dq1cR+MGCP=DRvcEzM=pCPcKL5u6-O+xofR1Q@mail.gmail.com>
Date:   Tue, 16 Nov 2021 19:32:46 +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 4/8] 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/echainiv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/echainiv.c b/crypto/echainiv.c
index 69686668625e..6a7321da2fc1 100644
--- a/crypto/echainiv.c
+++ b/crypto/echainiv.c
@@ -64,7 +64,7 @@ static int echainiv_encrypt(struct aead_request *req)

     memcpy(&nseqno, info + ivsize - 8, 8);
     seqno = be64_to_cpu(nseqno);
-    memset(info, 0, ivsize);
+    memzero_explicit(info, ivsize);

     scatterwalk_map_and_copy(info, req->dst, req->assoclen, ivsize, 1);

--