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authorLeonidas S. Barbosa <leosilva@linux.vnet.ibm.com>2014-10-28 15:42:46 -0200
committerHerbert Xu <herbert@gondor.apana.org.au>2014-11-06 23:15:00 +0800
commitac0f0a8a87642bc0dd589a6ead58d273a02d98e4 (patch)
tree40bcc06a68392c839c7cf8a8c14e1764686af1b7 /drivers/crypto/nx/nx-aes-cbc.c
parent19167bfd8ae72ceeb41930343227bf8f5fb19a66 (diff)
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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>
Diffstat (limited to 'drivers/crypto/nx/nx-aes-cbc.c')
-rw-r--r--drivers/crypto/nx/nx-aes-cbc.c12
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;