From: Alex Cope <alexcope@google.com>
Date: Mon, 14 Nov 2016 19:02:54 +0000 (-0800)
Subject: UPSTREAM: crypto: gf128mul - Zero memory when freeing multiplication table
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8ea7531e4764805981be72a2b1eed3617af24a38;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

UPSTREAM: crypto: gf128mul - Zero memory when freeing multiplication table

GF(2^128) multiplication tables are typically used for secret
information, so it's a good idea to zero them on free.

Signed-off-by: Alex Cope <alexcope@google.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry-picked from 75aa0a7cafe951538c7cb7c5ed457a3371ec5bcd)
Bug: 32975945
Signed-off-by: Eric Biggers <ebiggers@google.com>
Change-Id: I37b1ae9544158007f9ee2caf070120f4a42153ab
---

diff --git a/crypto/gf128mul.c b/crypto/gf128mul.c
index 5276607c72d0..0594dd6f82f2 100644
--- a/crypto/gf128mul.c
+++ b/crypto/gf128mul.c
@@ -352,8 +352,8 @@ void gf128mul_free_64k(struct gf128mul_64k *t)
 	int i;
 
 	for (i = 0; i < 16; i++)
-		kfree(t->t[i]);
-	kfree(t);
+		kzfree(t->t[i]);
+	kzfree(t);
 }
 EXPORT_SYMBOL(gf128mul_free_64k);
 
diff --git a/include/crypto/gf128mul.h b/include/crypto/gf128mul.h
index da2530e34b26..7217fe6dbe33 100644
--- a/include/crypto/gf128mul.h
+++ b/include/crypto/gf128mul.h
@@ -177,7 +177,7 @@ void gf128mul_4k_bbe(be128 *a, struct gf128mul_4k *t);
 
 static inline void gf128mul_free_4k(struct gf128mul_4k *t)
 {
-	kfree(t);
+	kzfree(t);
 }