From: Sasha Levin <sasha.levin@oracle.com>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: syzkaller@googlegroups.com, Sasha Levin <levinsasha928@gmail.com>,
Pekka Enberg <penberg@kernel.org>,
Asias He <asias.hejun@gmail.com>,
penberg@cs.helsinki.fi, Cyrill Gorcunov <gorcunov@gmail.com>,
Will Deacon <will.deacon@arm.com>,
matt@ozlabs.org, Michael Ellerman <michael@ellerman.id.au>,
Prasad Joshi <prasadjoshi124@gmail.com>,
marc.zyngier@arm.com,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
mingo@elte.hu, gorcunov@openvz.org, kvm@vger.kernel.org,
Kostya Serebryany <kcc@google.com>,
Evgenii Stepanov <eugenis@google.com>,
Alexey Samsonov <samsonov@google.com>,
Alexander Potapenko <glider@google.com>
Subject: Re: Network hangs when communicating with host
Date: Tue, 20 Oct 2015 09:58:51 -0400 [thread overview]
Message-ID: <5626489B.1020309@oracle.com> (raw)
In-Reply-To: <CACT4Y+Y4zms77yDAu1sQaan8NmB40gx3BCP0t0++1Tw_k8Pa6w@mail.gmail.com>
On 10/20/2015 09:42 AM, Dmitry Vyukov wrote:
> I now have another issue. My binary fails to mmap a file within lkvm
> sandbox. The same binary works fine on host and in qemu. I've added
> strace into sandbox script, and here is the output:
>
> [pid 837] openat(AT_FDCWD, "syzkaller-shm048878722", O_RDWR|O_CLOEXEC) = 5
> [pid 837] mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_SHARED, 5,
> 0) = -1 EINVAL (Invalid argument)
>
> I don't see anything that can potentially cause EINVAL here. Is it
> possible that lkvm somehow affects kernel behavior here?
>
> I run lkvm as:
>
> $ taskset 1 /kvmtool/lkvm sandbox --disk syz-0 --mem=2048 --cpus=2
> --kernel /arch/x86/boot/bzImage --network mode=user --sandbox
> /workdir/kvm/syz-0.sh
It's possible that something in the virtio-9p layer is broken. I'll give
it a look in the evening.
Thanks,
Sasha
next prev parent reply other threads:[~2015-10-20 13:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-15 20:20 Network hangs when communicating with host Dmitry Vyukov
2015-10-16 17:25 ` Sasha Levin
[not found] ` <CACT4Y+bG3gZv7eBUg5hv=5CEasdGUHwYEe6Bae6OVMK3bZe1Rw@mail.gmail.com>
2015-10-19 9:22 ` Andre Przywara
2015-10-19 9:28 ` Dmitry Vyukov
2015-10-19 14:20 ` Sasha Levin
2015-10-20 13:42 ` Dmitry Vyukov
2015-10-20 13:58 ` Sasha Levin [this message]
2015-10-27 9:31 ` Will Deacon
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