crypto: atmel-tdes - use scatterlist length before DMA mapping

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Using sg_dma_len() is only valid after mapping the scatterlist with
dma_map_sg(). However, atmel_tdes_crypt_start() uses it before mapping
to compare input/output lengths and to compute the transfer count.

Use the original scatterlist lengths before DMA mapping to avoid reading
stale or uninitialized DMA lengths when CONFIG_NEED_SG_DMA_LENGTH=y.

Drop the output scatterlist length in the fast path since it is equal to
->in_sg->length and does not change the transfer count.

Fixes: 13802005d8 ("crypto: atmel - add Atmel DES/TDES driver")
Fixes: 1f858040c2 ("crypto: atmel-tdes - add support for latest release of the IP (0x700)")
Cc: stable@vger.kernel.org
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Thorsten Blum 2026-06-11 12:36:35 +02:00 • committed by Herbert Xu

parent bbf3f2787e

commit ba199bdaa8

1 changed files with 2 additions and 3 deletions

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drivers/crypto/atmel-tdes.c

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