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crypto: mxs-dcp - fix source scatterlist length access

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mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source
scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid
and could return zero or a stale DMA length, causing encryption and
decryption to process the wrong number of bytes when
CONFIG_NEED_SG_DMA_LENGTH=y.

Use the original scatterlist length instead.

Fixes: 15b59e7c37 ("crypto: mxs - Add Freescale MXS DCP driver")
Cc: stable@vger.kernel.org
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Thorsten Blum 2026-06-21 21:26:16 +02:00 committed by Herbert Xu
parent d03f980a25
commit c5bcb084a9
1 changed files with 1 additions and 1 deletions
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2
drivers/crypto/mxs-dcp.c
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@ -353,7 +353,7 @@ static int mxs_dcp_aes_block_crypt(struct crypto_async_request *arq)
for_each_sg(req->src, src, sg_nents(req->src), i) {
src_buf = sg_virt(src);
len = sg_dma_len(src);
len = src->length;
tlen += len;
limit_hit = tlen > req->cryptlen;