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>
diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c
index a668286..500e409 100644
--- a/drivers/crypto/s5p-sss.c
+++ b/drivers/crypto/s5p-sss.c
@@ -542,15 +542,21 @@
uint32_t aes_control;
unsigned long flags;
int err;
+ 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;
@@ -581,7 +587,7 @@
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, dev->sg_src);
s5p_set_dma_outdata(dev, dev->sg_dst);