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authorKamil Konieczny <k.konieczny@partner.samsung.com>2018-02-07 16:52:09 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-02-25 11:01:21 +0100
commitcebca8006e7b3f0bb7a97f3307ebcc5a0f4f9de7 (patch)
treeeb0971260395d13bb1f4c3795a23c1ce3bfbd4de
parent428eb673375a06cb0dbd12ce50eefba225ff4285 (diff)
crypto: s5p-sss - Fix kernel Oops in AES-ECB mode
commit c927b080c67e3e97193c81fc1d27f4251bf4e036 upstream. In AES-ECB mode crypt is done with key only, so any use of IV can cause kernel Oops. Use IV only in AES-CBC and AES-CTR. Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com> Reported-by: Anand Moon <linux.amoon@gmail.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Tested-by: Anand Moon <linux.amoon@gmail.com> Cc: stable@vger.kernel.org # can be applied after commit 8f9702aad138 Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/crypto/s5p-sss.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c
index 5f0e3bb9006d..9c046904f001 100644
--- a/drivers/crypto/s5p-sss.c
+++ b/drivers/crypto/s5p-sss.c
@@ -419,16 +419,21 @@ static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode)
uint32_t aes_control;
int err;
unsigned long flags;
+ u8 *iv;
aes_control = SSS_AES_KEY_CHANGE_MODE;
if (mode & FLAGS_AES_DECRYPT)
aes_control |= SSS_AES_MODE_DECRYPT;
- if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC)
+ if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC) {
aes_control |= SSS_AES_CHAIN_MODE_CBC;
- else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR)
+ iv = req->info;
+ } else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) {
aes_control |= SSS_AES_CHAIN_MODE_CTR;
-
+ iv = req->info;
+ } else {
+ iv = NULL; /* AES_ECB */
+ }
if (dev->ctx->keylen == AES_KEYSIZE_192)
aes_control |= SSS_AES_KEY_SIZE_192;
else if (dev->ctx->keylen == AES_KEYSIZE_256)
@@ -458,7 +463,7 @@ static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode)
goto outdata_error;
SSS_AES_WRITE(dev, AES_CONTROL, aes_control);
- s5p_set_aes(dev, dev->ctx->aes_key, req->info, dev->ctx->keylen);
+ s5p_set_aes(dev, dev->ctx->aes_key, iv, dev->ctx->keylen);
s5p_set_dma_indata(dev, req->src);
s5p_set_dma_outdata(dev, req->dst);