4.19-stable review patch. If anyone has any objections, please let me know.
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From: Gilad Ben-Yossef gilad@benyossef.com
commit c139c72e2beb3e3db5148910b3962b7322e24374 upstream.
We were copying the last ciphertext block into the IV field for CBC before removing the DMA mapping of the output buffer with the result of the buffer sometime being out-of-sync cache wise and were getting intermittent cases of bad output IV.
Fix it by moving the DMA buffer unmapping before the copy.
Signed-off-by: Gilad Ben-Yossef gilad@benyossef.com Fixes: 00904aa0cd59 ("crypto: ccree - fix iv handling") Cc: stable@vger.kernel.org Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/crypto/ccree/cc_cipher.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/crypto/ccree/cc_cipher.c +++ b/drivers/crypto/ccree/cc_cipher.c @@ -635,6 +635,8 @@ static void cc_cipher_complete(struct de unsigned int ivsize = crypto_skcipher_ivsize(sk_tfm); unsigned int len;
+ cc_unmap_cipher_request(dev, req_ctx, ivsize, src, dst); + switch (ctx_p->cipher_mode) { case DRV_CIPHER_CBC: /* @@ -664,7 +666,6 @@ static void cc_cipher_complete(struct de break; }
- cc_unmap_cipher_request(dev, req_ctx, ivsize, src, dst); kzfree(req_ctx->iv);
skcipher_request_complete(req, err);