linux-kernel - Re: KASAN: use-after-free Read in aead

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Date:   Tue, 28 Nov 2017 07:30:46 +0100
From:   Stephan Mueller <smueller@...onox.de>
To:     Eric Biggers <ebiggers3@...il.com>
Cc:     syzbot 
        <bot+6fbc13c3b1ed2105e7a2e516be43d6a0624a59c0@...kaller.appspotmail.com>,
        davem@...emloft.net, herbert@...dor.apana.org.au,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: use-after-free Read in aead_recvmsg

Am Montag, 27. November 2017, 23:43:08 CET schrieb Eric Biggers:

Hi Eric,

> No, that doesn't help.  I tested v4.15-rc1 with all the extra commits from
> crypto-2.6.git/master applied:
> 
> 	crypto: algif_aead - skip SGL entries with NULL page
> 	crypto: af_alg - remove locking in async callback
> 	crypto: skcipher - Fix skcipher_walk_aead_common
> 
> Did you use the .config the bot provided?  It's possible the bug is only
> noticable with KASAN enabled.

Not so far, but the bug seemed to be there without my patch and then gone 
after testing it with my patch. It seems not.

I will use your config then.

Thank you.



Ciao
Stephan