linux-kernel - Re: KASAN: slab-out-of-bounds Read in crypto_chacha20

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Message-ID: <20171130090105.GB5451@zzz.localdomain>
Date:   Thu, 30 Nov 2017 01:01:05 -0800
From:   Eric Biggers <ebiggers3@...il.com>
To:     syzbot 
        <bot+f574f3c1cda02a64178d8a137bc83881e246ac9c@...kaller.appspotmail.com>
Cc:     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: slab-out-of-bounds Read in crypto_chacha20_crypt

On Thu, Nov 30, 2017 at 12:37:01AM -0800, syzbot wrote:
> ==================================================================
> BUG: KASAN: slab-out-of-bounds in __le32_to_cpup
> include/uapi/linux/byteorder/little_endian.h:58 [inline]
> BUG: KASAN: slab-out-of-bounds in le32_to_cpuvp crypto/chacha20_generic.c:19
> [inline]
> BUG: KASAN: slab-out-of-bounds in crypto_chacha20_init
> crypto/chacha20_generic.c:58 [inline]
> BUG: KASAN: slab-out-of-bounds in crypto_chacha20_crypt+0xaf1/0xbd0
> crypto/chacha20_generic.c:91
> Read of size 4 at addr ffff880100000006 by task syz-executor1/15417

#syz dup: general protection fault in crypto_chacha20_crypt