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crypto: stm32 - fix loop iterating through scatterlist for DMA

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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 : 8a1012d3f2 ("crypto: stm32 - Support for STM32 HASH module")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Bourgoin <thomas.bourgoin@foss.st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Thomas Bourgoin 2023-07-13 17:15:15 +02:00 committed by Herbert Xu
parent 0e99d38ff6
commit d9c83f71ee
1 changed files with 1 additions and 1 deletions
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2
drivers/crypto/stm32/stm32-hash.c
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@ -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);