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crypto: drbg - make drbg_prepare_hrng() handle jent instantiation errors 

Now that drbg_prepare_hrng() doesn't do anything but to instantiate a
jitterentropy crypto_rng instance, it looks a little odd to have the
related error handling at its only caller, drbg_instantiate().

Move the handling of jitterentropy allocation failures from
drbg_instantiate() close to the allocation itself in drbg_prepare_hrng().

There is no change in behaviour.

Signed-off-by: Nicolai Stange <nstange@suse.de>
Reviewed-by: Stephan Müller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Nicolai Stange 2021-11-15 15:18:08 +01:00 committed by Herbert Xu
parent 074bcd4000
commit 559edd47cc
1 changed files with 8 additions and 8 deletions
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16
crypto/drbg.c
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@ -1516,6 +1516,14 @@ static int drbg_prepare_hrng(struct drbg_state *drbg)
return 0;
drbg->jent = crypto_alloc_rng("jitterentropy_rng", 0, 0);
if (IS_ERR(drbg->jent)) {
const int err = PTR_ERR(drbg->jent);
drbg->jent = NULL;
if (fips_enabled || err != -ENOENT)
return err;
pr_info("DRBG: Continuing without Jitter RNG\n");
}
return 0;
}
@ -1571,14 +1579,6 @@ static int drbg_instantiate(struct drbg_state *drbg, struct drbg_string *pers,
if (ret)
goto free_everything;
if (IS_ERR(drbg->jent)) {
ret = PTR_ERR(drbg->jent);
drbg->jent = NULL;
if (fips_enabled || ret != -ENOENT)
goto free_everything;
pr_info("DRBG: Continuing without Jitter RNG\n");
}
reseed = false;
}