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crypto: algapi - enforce that all instances have a ->free() method

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All instances need to have a ->free() method, but people could forget to
set it and then not notice if the instance is never unregistered.  To
help detect this bug earlier, don't allow an instance without a ->free()
method to be registered, and complain loudly if someone tries to do it.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers
2020-01-02 20:04:40 -08:00
committed by Herbert Xu
parent a24a1fd731
commit d4fdc2dfaa
5 changed files with 14 additions and 0 deletions
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3
crypto/skcipher.c
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@@ -865,6 +865,9 @@ int skcipher_register_instance(struct crypto_template *tmpl,
{
int err;
if (WARN_ON(!inst->free))
return -EINVAL;
err = skcipher_prepare_alg(&inst->alg);
if (err)
return err;