diff options
| author | Ovidiu Panait <ovidiu.panait@windriver.com> | 2021-01-15 22:46:05 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-01-22 14:58:04 +1100 |
| commit | 29dfe4d94f5c99d164c307b8320e45cb85fb4b21 (patch) | |
| tree | 06b0b0b7ac233c4ce04d5648aba6b458a220e5b5 /drivers/crypto | |
| parent | ac88c322d0f2917d41d13553c69e9d7f043c8b6f (diff) | |
crypto: keembay - use 64-bit arithmetic for computing bit_len
src_size and aad_size are defined as u32, so the following expressions are
currently being evaluated using 32-bit arithmetic:
bit_len = src_size * 8;
...
bit_len = aad_size * 8;
However, bit_len is used afterwards in a context that expects a valid
64-bit value (the lower and upper 32-bit words of bit_len are extracted
and written to hw).
In order to make sure the correct bit length is generated and the 32-bit
multiplication does not wrap around, cast src_size and aad_size to u64.
Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Acked-by: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/keembay/ocs-aes.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/crypto/keembay/ocs-aes.c b/drivers/crypto/keembay/ocs-aes.c index cc286adb1c4a..b85c89477afa 100644 --- a/drivers/crypto/keembay/ocs-aes.c +++ b/drivers/crypto/keembay/ocs-aes.c @@ -958,14 +958,14 @@ int ocs_aes_gcm_op(struct ocs_aes_dev *aes_dev, ocs_aes_write_last_data_blk_len(aes_dev, src_size); /* Write ciphertext bit length */ - bit_len = src_size * 8; + bit_len = (u64)src_size * 8; val = bit_len & 0xFFFFFFFF; iowrite32(val, aes_dev->base_reg + AES_MULTIPURPOSE2_0_OFFSET); val = bit_len >> 32; iowrite32(val, aes_dev->base_reg + AES_MULTIPURPOSE2_1_OFFSET); /* Write aad bit length */ - bit_len = aad_size * 8; + bit_len = (u64)aad_size * 8; val = bit_len & 0xFFFFFFFF; iowrite32(val, aes_dev->base_reg + AES_MULTIPURPOSE2_2_OFFSET); val = bit_len >> 32; |