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From: Eric Biggers <ebiggers3@gmail.com>
To: syzbot
	<bot+fa2ed481fed0c7ace1571b88a89dfd49ffd89cb6@syzkaller.appspotmail.com>
Cc: davem@davemloft.net, herbert@gondor.apana.org.au,
	linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
	syzkaller-bugs@googlegroups.com
Subject: Re: general protection fault in crypto_chacha20_crypt
Date: Mon, 11 Dec 2017 11:06:09 -0800	[thread overview]
Message-ID: <20171211190609.GC62691@gmail.com> (raw)
In-Reply-To: <20171129092438.GC20992@zzz.localdomain>

On Wed, Nov 29, 2017 at 01:24:38AM -0800, Eric Biggers wrote:
> 
> The bug is that the skcipher_walk API doesn't set the IV for zero-length inputs,
> while some algorithms (e.g. ChaCha20) access the IV even if the input is
> zero-length.  So it was dereferencing a pointer which came from uninitialized
> stack memory.  I've sent out a fix:
> 
> "crypto: skcipher - set walk.iv for zero-length inputs"
> 

#syz fix: crypto: skcipher - set walk.iv for zero-length inputs

      reply	other threads:[~2017-12-11 19:06 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-28 14:22 general protection fault in crypto_chacha20_crypt syzbot
2017-11-29  9:24 ` Eric Biggers
2017-12-11 19:06   ` Eric Biggers [this message]

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