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crypto: skcipher - Add helper to zero stack request 

As the size of an skcipher_request is variable, it's awkward to
zero it explicitly.  This patch adds a helper to do that which
should be used when it is created on the stack.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2016-01-22 23:21:10 +08:00
parent e67ffe0af4
commit 1aaa753d91
1 changed files with 7 additions and 0 deletions
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7
include/crypto/skcipher.h
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@ -445,6 +445,13 @@ static inline void skcipher_request_free(struct skcipher_request *req)
kzfree(req);
}
static inline void skcipher_request_zero(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
memzero_explicit(req, sizeof(*req) + crypto_skcipher_reqsize(tfm));
}
/**
* skcipher_request_set_callback() - set asynchronous callback function
* @req: request handle