[PATCH 1/9] Moving NX-AES-CBC to be processed logic
From: Leonidas S. Barbosa <hidden>
Date: 2014-10-28 17:42:58
Also in:
lkml
Subsystem:
crypto api, ibm power in-nest crypto acceleration, linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Herbert Xu, "David S. Miller", Breno Leitão, Nayna Jain, Paulo Flabiano Smorigo, Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
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 <redacted> --- 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 cc00b52..a066cc3 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;
--
1.7.1