crypto: qce: skcipher: Fix incorrect sg count for dma transfers

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Use the sg count returned by dma_map_sg to call into
dmaengine_prep_slave_sg rather than using the original sg count. dma_map_sg
can merge consecutive sglist entries, thus making the original sg count
wrong. This is a fix for memory coruption issues observed while testing
encryption/decryption of large messages using libkcapi framework.

Patch has been tested further by running full suite of tcrypt.ko tests
including fuzz tests.

Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

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Thara Gopinath 2021-05-20 22:20:23 -04:00 • committed by Herbert Xu

parent 9b7b94683a

commit 1339a7c3ba

1 changed files with 8 additions and 7 deletions

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drivers/crypto/qce/skcipher.c

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