crypto: aesni-intel - fix wrong kfree pointer

kfree(new_key_mem) in rfc4106_set_key() should be called on malloced pointer,
not on aligned one, otherwise it can cause invalid pointer on free.

(Seen at least once when running tcrypt tests with debug kernel.)

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 4 insertions, 4 deletions

diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index d6626152067d..34fdcff4d2c8 100644
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -529,7 +529,7 @@ static int rfc4106_set_key(struct crypto_aead *parent, const u8 *key,
         struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
         struct aesni_rfc4106_gcm_ctx *child_ctx =
                                  aesni_rfc4106_gcm_ctx_get(cryptd_child);
-        u8 *new_key_mem = NULL;
+        u8 *new_key_align, *new_key_mem = NULL;
 
         if (key_len < 4) {
                 crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
@@ -553,9 +553,9 @@ static int rfc4106_set_key(struct crypto_aead *parent, const u8 *key,
                 if (!new_key_mem)
                         return -ENOMEM;
 
-                new_key_mem = PTR_ALIGN(new_key_mem, AESNI_ALIGN);
-                memcpy(new_key_mem, key, key_len);
-                key = new_key_mem;
+                new_key_align = PTR_ALIGN(new_key_mem, AESNI_ALIGN);
+                memcpy(new_key_align, key, key_len);
+                key = new_key_align;
         }
 
         if (!irq_fpu_usable())