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crypto: algapi - reject NULL crypto_spawn::inst

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It took me a while to notice the bug where the adiantum template left
crypto_spawn::inst == NULL, because this only caused problems in certain
cases where algorithms are dynamically loaded/unloaded.

More improvements are needed, but for now make crypto_init_spawn()
reject this case and WARN(), so this type of bug will be noticed
immediately in the future.

Note: I checked all callers and the adiantum template was the only place
that had this wrong.  So this WARN shouldn't trigger anymore.

Signed-off-by: Eric Biggers <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Eric Biggers 2019-01-06 12:46:06 -08:00 • committed by Herbert Xu
commit 6b476662b0
1 changed files with 3 additions and 0 deletions
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3
crypto/algapi.c
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@ -608,6 +608,9 @@ int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
{
int err = -EAGAIN;
if (WARN_ON_ONCE(inst == NULL))
return -EINVAL;
spawn->inst = inst;
spawn->mask = mask;