Commit beeb460c authored by Eric Biggers's avatar Eric Biggers Committed by Herbert Xu
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crypto: algapi - Avoid spurious modprobe on LOADED 



Currently after any algorithm is registered and tested, there's an
unnecessary request_module("cryptomgr") even if it's already loaded.
Also, CRYPTO_MSG_ALG_LOADED is sent twice, and thus if the algorithm is
"crct10dif", lib/crc-t10dif.c replaces the tfm twice rather than once.

This occurs because CRYPTO_MSG_ALG_LOADED is sent using
crypto_probing_notify(), which tries to load "cryptomgr" if the
notification is not handled (NOTIFY_DONE).  This doesn't make sense
because "cryptomgr" doesn't handle this notification.

Fix this by using crypto_notify() instead of crypto_probing_notify().

Fixes: dd8b083f ("crypto: api - Introduce notifier for new crypto algorithms")
Cc: <stable@vger.kernel.org> # v4.20+
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 56b80bde

crypto/algapi.c

+1 −1
Original line number Diff line number Diff line
@@ -403,7 +403,7 @@ static void crypto_wait_for_test(struct crypto_larval *larval) 
	err = wait_for_completion_killable(&larval->completion);

	WARN_ON(err);

	if (!err)

		crypto_probing_notify(CRYPTO_MSG_ALG_LOADED, larval);

		crypto_notify(CRYPTO_MSG_ALG_LOADED, larval);



out:

	crypto_larval_kill(&larval->alg);