Re: KMSAN: uninit-value in __inet6_bind

[Cong Wang]

On Tue, Dec 11, 2018 at 1:04 AM Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote:
>
> On Tue, Dec 11, 2018 at 1:41 AM syzbot
> <syzbot+c56449ed3652e6720f30@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> >
> > Hello,
> >
> > syzbot found the following crash on:
> >
> > HEAD commit:    3f06bda61398 kmsan: remove excessive KMSAN wrappers from a..
> > git tree:       https://github.com/google/kmsan.git/master
> > console output: https://syzkaller.appspot.com/x/log.txt?x=13ca6b05400000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=9b071100dcf8e641
> > dashboard link: https://syzkaller.appspot.com/bug?extid=c56449ed3652e6720f30
> > compiler:       clang version 8.0.0 (trunk 348261)
> >
> > Unfortunately, I don't have any reproducer for this crash yet.
> >
> > IMPORTANT: if you fix the bug, please add the following tag to the commit:
> > Reported-by: syzbot+c56449ed3652e6720f30@xxxxxxxxxxxxxxxxxxxxxxxxx
>
> This looks like a bug in TIPC, +TIPC maintainers.
>

It looks more like udp_sock_create6() doesn't initialize
udp6_addr.sin6_scope_id.