From: Thomas Bourgoin Date: Thu, 13 Jul 2023 15:15:15 +0000 (+0200) Subject: crypto: stm32 - fix loop iterating through scatterlist for DMA X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d9c83f71eeceed2cb54bb78be84f2d4055fd9a1f;p=linux crypto: stm32 - fix loop iterating through scatterlist for DMA We were reading the length of the scatterlist sg after copying value of tsg inside. So we are using the size of the previous scatterlist and for the first one we are using an unitialised value. Fix this by copying tsg in sg[0] before reading the size. Fixes : 8a1012d3f2ab ("crypto: stm32 - Support for STM32 HASH module") Cc: stable@vger.kernel.org Signed-off-by: Thomas Bourgoin Signed-off-by: Herbert Xu --- diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c index c179a6c1a457..519fb716acee 100644 --- a/drivers/crypto/stm32/stm32-hash.c +++ b/drivers/crypto/stm32/stm32-hash.c @@ -678,9 +678,9 @@ static int stm32_hash_dma_send(struct stm32_hash_dev *hdev) } for_each_sg(rctx->sg, tsg, rctx->nents, i) { + sg[0] = *tsg; len = sg->length; - sg[0] = *tsg; if (sg_is_last(sg)) { if (hdev->dma_mode == 1) { len = (ALIGN(sg->length, 16) - 16);