From 63832a0c6fe180aa34d2a77052aa501be6281c99 Mon Sep 17 00:00:00 2001 From: Tero Kristo Date: Wed, 27 May 2020 15:24:27 +0300 Subject: [PATCH] crypto: omap-sham - fix very small data size handling With very small data sizes, the whole data can end up in the xmit buffer. This code path does not set the sg_len properly which causes the core dma framework to crash. Fix by adding the proper size in place. Also, the data length must be a multiple of block-size, so extend the DMA data size while here. Signed-off-by: Tero Kristo Signed-off-by: Herbert Xu --- drivers/crypto/omap-sham.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 5efc66ccef46..45bc551ebc20 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -752,9 +752,11 @@ static int omap_sham_align_sgs(struct scatterlist *sg, if (!sg || !sg->length || !nbytes) { if (bufcnt) { + bufcnt = DIV_ROUND_UP(bufcnt, bs) * bs; sg_init_table(rctx->sgl, 1); sg_set_buf(rctx->sgl, rctx->dd->xmit_buf, bufcnt); rctx->sg = rctx->sgl; + rctx->sg_len = 1; } return 0;