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crypto: af_alg - use struct_size() in sock_kfree_s()

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Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes, in particular in the
context in which this code is being used.

So, change the following form:

sizeof(*sgl) + sizeof(sgl->sg[0]) * (MAX_SGL_ENTS + 1)

to :

struct_size(sgl, sg, MAX_SGL_ENTS + 1)

This code was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gustavo A. R. Silva 2019-02-21 12:04:23 -06:00 committed by Herbert Xu
parent 867659c637
commit 91e14842f8
1 changed files with 1 additions and 2 deletions
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3
crypto/af_alg.c
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@ -635,8 +635,7 @@ void af_alg_pull_tsgl(struct sock *sk, size_t used, struct scatterlist *dst,
}
list_del(&sgl->list);
sock_kfree_s(sk, sgl, sizeof(*sgl) + sizeof(sgl->sg[0]) *
(MAX_SGL_ENTS + 1));
sock_kfree_s(sk, sgl, struct_size(sgl, sg, MAX_SGL_ENTS + 1));
}
if (!ctx->used)