On 2019/7/25 下午2:02, Michael S. Tsirkin wrote:
On Mon, Jul 22, 2019 at 11:11:52AM -0300, Jason Gunthorpe wrote:
On Sun, Jul 21, 2019 at 06:02:52AM -0400, Michael S. Tsirkin wrote:
On Sat, Jul 20, 2019 at 03:08:00AM -0700, syzbot wrote:
syzbot has bisected this bug to:
commit 7f466032dc9e5a61217f22ea34b2df932786bbfc
Author: Jason Wang <jasowang@xxxxxxxxxx>
Date: Fri May 24 08:12:18 2019 +0000
vhost: access vq metadata through kernel virtual address
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=149a8a20600000
start commit: 6d21a41b Add linux-next specific files for 20190718
git tree: linux-next
final crash: https://syzkaller.appspot.com/x/report.txt?x=169a8a20600000
console output: https://syzkaller.appspot.com/x/log.txt?x=129a8a20600000
kernel config: https://syzkaller.appspot.com/x/.config?x=3430a151e1452331
dashboard link: https://syzkaller.appspot.com/bug?extid=e58112d71f77113ddb7b
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10139e68600000
Reported-by: syzbot+e58112d71f77113ddb7b@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 7f466032dc9e ("vhost: access vq metadata through kernel virtual
address")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
OK I poked at this for a bit, I see several things that
we need to fix, though I'm not yet sure it's the reason for
the failures:
This stuff looks quite similar to the hmm_mirror use model and other
places in the kernel. I'm still hoping we can share this code a bit more.
Right. I think hmm is something we should look at.
Exactly. I plan to do that.
Thanks
