linux-kernel - Re: Deadlock when using crypto API for block devices

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20180824112517.pct5bwdlhfdtqwil@gondor.apana.org.au>
Date:   Fri, 24 Aug 2018 19:25:18 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Mikulas Patocka <mpatocka@...hat.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        linux-crypto@...r.kernel.org, Mike Snitzer <msnitzer@...hat.com>,
        dm-devel@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: Deadlock when using crypto API for block devices

On Fri, Aug 24, 2018 at 07:22:19AM -0400, Mikulas Patocka wrote:
>
> And also ablkcipher_next_slow, ablkcipher_copy_iv, skcipher_next_slow, 
> skcipher_next_copy, skcipher_copy_iv, blkcipher_next_slow, 
> blkcipher_copy_iv.
> 
> So, I think that dropping CRYPTO_TFM_REQ_MAY_SLEEP is not possible.

These should never trigger for dm-crypt AFAICS since it only
happens if you provide unaligned input/output.

Cheers,
-- 
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