diff options
| author | Leonidas S. Barbosa <leosilva@linux.vnet.ibm.com> | 2014-10-28 20:42:46 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2014-11-06 18:15:00 +0300 |
| commit | ac0f0a8a87642bc0dd589a6ead58d273a02d98e4 (patch) | |
| tree | 40bcc06a68392c839c7cf8a8c14e1764686af1b7 | |
| parent | 19167bfd8ae72ceeb41930343227bf8f5fb19a66 (diff) | |
| download | linux-ac0f0a8a87642bc0dd589a6ead58d273a02d98e4.tar.xz | |
crypto: nx - Moving NX-AES-CBC to be processed logic
The previous limits were estimated locally in a single step
basead on bound values, however it was not correct since
when given certain scatterlist the function nx_build_sg_lists
was consuming more sg entries than allocated causing a
memory corruption and crashes.
This patch removes the old logic and replaces it into nx_sg_build_lists
in order to build a correct nx_sg list using the correct sg_max limit
and bounds.
Signed-off-by: Leonidas S. Barbosa <leosilva@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/nx/nx-aes-cbc.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/drivers/crypto/nx/nx-aes-cbc.c b/drivers/crypto/nx/nx-aes-cbc.c index cc00b52306ba..a066cc3450ae 100644 --- a/drivers/crypto/nx/nx-aes-cbc.c +++ b/drivers/crypto/nx/nx-aes-cbc.c @@ -72,27 +72,19 @@ static int cbc_aes_nx_crypt(struct blkcipher_desc *desc, struct nx_csbcpb *csbcpb = nx_ctx->csbcpb; unsigned long irq_flags; unsigned int processed = 0, to_process; - u32 max_sg_len; int rc; spin_lock_irqsave(&nx_ctx->lock, irq_flags); - max_sg_len = min_t(u32, nx_driver.of.max_sg_len/sizeof(struct nx_sg), - nx_ctx->ap->sglen); - if (enc) NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT; else NX_CPB_FDM(csbcpb) &= ~NX_FDM_ENDE_ENCRYPT; do { - to_process = min_t(u64, nbytes - processed, - nx_ctx->ap->databytelen); - to_process = min_t(u64, to_process, - NX_PAGE_SIZE * (max_sg_len - 1)); - to_process = to_process & ~(AES_BLOCK_SIZE - 1); + to_process = nbytes - processed; - rc = nx_build_sg_lists(nx_ctx, desc, dst, src, to_process, + rc = nx_build_sg_lists(nx_ctx, desc, dst, src, &to_process, processed, csbcpb->cpb.aes_cbc.iv); if (rc) goto out; |