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crypto: qat - avoid memory corruption or undefined behaviour

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memcopying to a (null pointer + offset) will result
in memory corruption or undefined behaviour.

Signed-off-by: Tudor Ambarus <tudor-dan.ambarus@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tudor Ambarus 2016-03-23 17:06:39 +02:00 committed by Herbert Xu
parent 0c4935b31d
commit aa8b6dd4b0
1 changed files with 1 additions and 1 deletions
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drivers/crypto/qat/qat_common/qat_asym_algs.c
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@ -593,7 +593,7 @@ int qat_rsa_get_d(void *context, size_t hdrlen, unsigned char tag,
ret = -ENOMEM;
ctx->d = dma_zalloc_coherent(dev, ctx->key_sz, &ctx->dma_d, GFP_KERNEL);
if (!ctx->n)
if (!ctx->d)
goto err;
memcpy(ctx->d + (ctx->key_sz - vlen), ptr, vlen);