diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
index 1c166b4..3dbb1cc 100644
--- a/crypto/ablkcipher.c
+++ b/crypto/ablkcipher.c
@@ -35,7 +35,7 @@
 	alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
 	memcpy(alignbuffer, key, keylen);
 	ret = cipher->setkey(tfm, alignbuffer, keylen);
-	memset(alignbuffer, 0, absize);
+	memset(alignbuffer, 0, keylen);
 	kfree(buffer);
 	return ret;
 }
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index 40a3dcf..7755834 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -352,7 +352,7 @@
 	alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
 	memcpy(alignbuffer, key, keylen);
 	ret = cipher->setkey(tfm, alignbuffer, keylen);
-	memset(alignbuffer, 0, absize);
+	memset(alignbuffer, 0, keylen);
 	kfree(buffer);
 	return ret;
 }
diff --git a/crypto/cipher.c b/crypto/cipher.c
index 0b2650c..fc6b46f 100644
--- a/crypto/cipher.c
+++ b/crypto/cipher.c
@@ -36,7 +36,7 @@
 	alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
 	memcpy(alignbuffer, key, keylen);
 	ret = cia->cia_setkey(tfm, alignbuffer, keylen);
-	memset(alignbuffer, 0, absize);
+	memset(alignbuffer, 0, keylen);
 	kfree(buffer);
 	return ret;
 
diff --git a/crypto/hash.c b/crypto/hash.c
index 4d75ca7..4fd470b 100644
--- a/crypto/hash.c
+++ b/crypto/hash.c
@@ -40,7 +40,7 @@
 	alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
 	memcpy(alignbuffer, key, keylen);
 	ret = alg->setkey(crt, alignbuffer, keylen);
-	memset(alignbuffer, 0, absize);
+	memset(alignbuffer, 0, keylen);
 	kfree(buffer);
 	return ret;
 }