From d4fdc2dfaa755e0bf22de6a2774cac2e5ae45cf4 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Thu, 2 Jan 2020 20:04:40 -0800 Subject: crypto: algapi - enforce that all instances have a ->free() method 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 Signed-off-by: Herbert Xu --- crypto/ahash.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'crypto/ahash.c') diff --git a/crypto/ahash.c b/crypto/ahash.c index cd5d9847d513..68a0f0cb75c4 100644 --- a/crypto/ahash.c +++ b/crypto/ahash.c @@ -656,6 +656,9 @@ int ahash_register_instance(struct crypto_template *tmpl, { int err; + if (WARN_ON(!inst->free)) + return -EINVAL; + err = ahash_prepare_alg(&inst->alg); if (err) return err; -- cgit v1.2.3