3.16.57-rc1 review patch. If anyone has any objections, please let me know.
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From: Kamil Konieczny k.konieczny@partner.samsung.com
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 Signed-off-by: Herbert Xu herbert@gondor.apana.org.au [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/crypto/s5p-sss.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
--- a/drivers/crypto/s5p-sss.c +++ b/drivers/crypto/s5p-sss.c @@ -426,15 +426,21 @@ static void s5p_aes_crypt_start(struct s 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; @@ -465,7 +471,7 @@ static void s5p_aes_crypt_start(struct s 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);