diff options
| author | Kamil Konieczny <k.konieczny@partner.samsung.com> | 2018-02-07 16:52:09 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-25 11:08:04 +0100 |
| commit | 95c0853883973c9c065959a33208751dcf8c57d1 (patch) | |
| tree | f96e910494a8de225c086750abc6475743938e93 | |
| parent | fc4cb30f2cd5f42631f81cb7afb7f5b325f5a23a (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.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c index 7ac657f46d15..aec66159566d 100644 --- a/drivers/crypto/s5p-sss.c +++ b/drivers/crypto/s5p-sss.c @@ -601,15 +601,21 @@ static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode) 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; @@ -640,7 +646,7 @@ 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, dev->sg_src); s5p_set_dma_outdata(dev, dev->sg_dst); |