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crypto: sun8i-ss - Use kfree_sensitive

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The kfree_sensitive is a kernel API to clear sensitive information
that should not be leaked to other future users of the same memory
objects and free the memory. Its function is the same as the
combination of memzero_explicit and kfree. Thus, we can replace the
combination APIs with the single kfree_sensitive API.

Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jason Wang 2021-07-20 21:01:04 +08:00 committed by Herbert Xu
parent ec2088b66f
commit 192b722f38
1 changed files with 3 additions and 6 deletions
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9
drivers/crypto/allwinner/sun8i-ss/sun8i-ss-prng.c
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@ -20,8 +20,7 @@ int sun8i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed,
struct sun8i_ss_rng_tfm_ctx *ctx = crypto_rng_ctx(tfm);
if (ctx->seed && ctx->slen != slen) {
memzero_explicit(ctx->seed, ctx->slen);
kfree(ctx->seed);
kfree_sensitive(ctx->seed);
ctx->slen = 0;
ctx->seed = NULL;
}
@ -48,8 +47,7 @@ void sun8i_ss_prng_exit(struct crypto_tfm *tfm)
{
struct sun8i_ss_rng_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
memzero_explicit(ctx->seed, ctx->slen);
kfree(ctx->seed);
kfree_sensitive(ctx->seed);
ctx->seed = NULL;
ctx->slen = 0;
}
@ -167,9 +165,8 @@ err_iv:
/* Update seed */
memcpy(ctx->seed, d + dlen, ctx->slen);
}
memzero_explicit(d, todo);
err_free:
kfree(d);
kfree_sensitive(d);
return err;
}