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

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Date:   Fri, 31 Jan 2020 13:06:56 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     Jozsef Kadlecsik <kadlec@...filter.org>, coreteam@...filter.org,
        David Miller <davem@...emloft.net>,
        Marco Elver <elver@...gle.com>,
        Florian Westphal <fw@...len.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        jeremy@...zel.net, Kate Stewart <kstewart@...uxfoundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>,
        Netdev <netdev@...r.kernel.org>,
        NetFilter <netfilter-devel@...r.kernel.org>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: KASAN: slab-out-of-bounds Read in bitmap_ip_add

On Fri, Jan 31, 2020 at 1:02 PM Cong Wang <xiyou.wangcong@...il.com> wrote:
>
> It is supposed to be fixed by commit 32c72165dbd0

Ahh, thanks, I missed that. I actually looked at the current code and
saw the bitmap_zalloc() and it all looked fine, and assumed there was
some other bug in the elements calculation.

I didn't realize that it looked fine because it had already been fixed.

Thanks,
             Linus