From: Herbert Xu <herbert@gondor.apana.org.au>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: linux-crypto@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, ebiggers@kernel.org,
will@kernel.org, kernel-team@android.com
Subject: Re: [PATCH v4 2/7] crypto: aead - disallow en/decrypt for non-task or non-softirq context
Date: Wed, 19 May 2021 19:29:30 +0800 [thread overview]
Message-ID: <20210519112930.sgy3trqczyfok7mn@gondor.apana.org.au> (raw)
In-Reply-To: <20210519112239.33664-3-ardb@kernel.org>
On Wed, May 19, 2021 at 01:22:34PM +0200, Ard Biesheuvel wrote:
>
> crypto_stats_get(alg);
> - if (crypto_aead_get_flags(aead) & CRYPTO_TFM_NEED_KEY)
> + if (!(alg->cra_flags & CRYPTO_ALG_ASYNC) &&
> + WARN_ONCE(!in_task() && !in_serving_softirq(),
> + "synchronous call from invalid context\n"))
> + ret = -EBUSY;
I don't think we've ever supported crypto in hard IRQ contexts.
So this should be done regardless of ASYNC.
Then again, do we really need this since the assumption has
always been that the crypto API can only be invoked in user or
softirq context?
Cheers,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-05-19 13:04 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-19 11:22 [PATCH v4 0/7] running kernel mode SIMD with softirqs disabled Ard Biesheuvel
2021-05-19 11:22 ` [PATCH v4 1/7] crypto: skcipher - handle zero sized inputs correctly Ard Biesheuvel
2021-05-19 11:22 ` [PATCH v4 2/7] crypto: aead - disallow en/decrypt for non-task or non-softirq context Ard Biesheuvel
2021-05-19 11:29 ` Herbert Xu [this message]
2021-05-19 11:36 ` Ard Biesheuvel
2021-05-19 11:51 ` Herbert Xu
2021-05-21 7:30 ` Ard Biesheuvel
2021-05-19 11:22 ` [PATCH v4 3/7] crypto: skcipher " Ard Biesheuvel
2021-05-19 11:22 ` [PATCH v4 4/7] crypto: arm64/gcm-aes-ce - remove non-SIMD fallback path Ard Biesheuvel
2021-05-19 11:22 ` [PATCH v4 5/7] crypto: arm64/aes-neonbs - stop using SIMD helper for skciphers Ard Biesheuvel
2021-05-19 11:22 ` [PATCH v4 6/7] crypto: arm64/aes-ce " Ard Biesheuvel
2021-05-19 11:22 ` [PATCH v4 7/7] crypto: arm64/aes-ccm - remove non-SIMD fallback path Ard Biesheuvel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210519112930.sgy3trqczyfok7mn@gondor.apana.org.au \
--to=herbert@gondor.apana.org.au \
--cc=ardb@kernel.org \
--cc=ebiggers@kernel.org \
--cc=kernel-team@android.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-crypto@vger.kernel.org \
--cc=will@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).