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From: Eric Biggers <ebiggers3@gmail.com>
To: Daniel Borkmann <daniel@iogearbox.net>
Cc: Dmitry Vyukov <dvyukov@google.com>,
	syzbot <syzbot+32b24f3e7c9000c48490@syzkaller.appspotmail.com>,
	Alexei Starovoitov <ast@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	netdev <netdev@vger.kernel.org>,
	syzkaller-bugs@googlegroups.com
Subject: Re: BUG: unable to handle kernel paging request in check_memory_region
Date: Tue, 30 Jan 2018 17:41:36 -0800	[thread overview]
Message-ID: <20180131014136.ulrq64mhcwd7fhqw@gmail.com> (raw)
In-Reply-To: <8bf5e24e-1bce-81dc-4e92-80ce20c5d152@iogearbox.net>

On Sun, Jan 14, 2018 at 01:22:13AM +0100, Daniel Borkmann wrote:
> On 01/13/2018 08:29 AM, Dmitry Vyukov wrote:
> > On Fri, Jan 12, 2018 at 11:58 PM, syzbot
> > <syzbot+32b24f3e7c9000c48490@syzkaller.appspotmail.com> wrote:
> >> Hello,
> >>
> >> syzkaller hit the following crash on
> >> c92a9a461dff6140c539c61e457aa97df29517d6
> >> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master
> >> compiler: gcc (GCC) 7.1.1 20170620
> >> .config is attached
> >> Raw console output is attached.
> >> C reproducer is attached
> >> syzkaller reproducer is attached. See https://goo.gl/kgGztJ
> >> for information about syzkaller reproducers
> >>
> >>
> >> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> >> Reported-by: syzbot+32b24f3e7c9000c48490@syzkaller.appspotmail.com
> >> It will help syzbot understand when the bug is fixed. See footer for
> >> details.
> >> If you forward the report, please keep this part and the footer.
> > 
> > 
> > Daniel, is it the same bug that was fixed by "bpf, array: fix overflow
> > in max_entries and undefined behavior in index_mask"?
> 
> And also here, fixed by:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=bbeb6e4323dad9b5e0ee9f60c223dd532e2403b1
> 

Thanks Daniel, this crash is no longer occurring and I verified that commit
bbeb6e4323da fixed it, so let's allow syzbot to close this report too:

#syz fix: bpf, array: fix overflow in max_entries and undefined behavior in index_mask

- Eric

      reply	other threads:[~2018-01-31  1:41 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-12 22:58 BUG: unable to handle kernel paging request in check_memory_region syzbot
2018-01-13  7:29 ` Dmitry Vyukov
2018-01-14  0:22   ` Daniel Borkmann
2018-01-31  1:41     ` Eric Biggers [this message]

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