linux-kernel - Re: WARNING in crypto_wait_for

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Message-ID: <20151214125219.GA1514@gondor.apana.org.au>
Date:	Mon, 14 Dec 2015 20:52:19 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephan Mueller <smueller@...onox.de>
Cc:	Dmitry Vyukov <dvyukov@...gle.com>,
	"David S. Miller" <davem@...emloft.net>,
	linux-crypto@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	syzkaller <syzkaller@...glegroups.com>,
	Kostya Serebryany <kcc@...gle.com>,
	Alexander Potapenko <glider@...gle.com>,
	Sasha Levin <sasha.levin@...cle.com>
Subject: Re: WARNING in crypto_wait_for_test

On Thu, Dec 10, 2015 at 03:14:24AM +0100, Stephan Mueller wrote:
>
> Herbert, alg_bind currently blacklists one bit in the mask and type bit array. 
> Shouldn't we instead white-list the allowed bits?

Well a bogus mask shouldn't lead to the warning anyway.

The warning in question is triggered only if crypto_schedule_test
returns NOTIFY_OK, which can only happen if try_module_get fails,
kzalloc fails, or if kthread_run fails.  All of these would be
real bugs (well except for the kzalloc failure perhaps).

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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