> -----Original Message----- > From: netdev-ow...@vger.kernel.org <netdev-ow...@vger.kernel.org> > On Behalf Of Eric Dumazet > Sent: 14-Dec-18 10:15 > To: Jon Maloy <jon.ma...@ericsson.com>; Cong Wang > <xiyou.wangc...@gmail.com>; Dmitry Vyukov <dvyu...@google.com> > Cc: syzbot+c56449ed3652e6720...@syzkaller.appspotmail.com; Ying Xue > <ying....@windriver.com>; tipc-discuss...@lists.sourceforge.net; David > Miller <da...@davemloft.net>; Alexey Kuznetsov <kuz...@ms2.inr.ac.ru>; > LKML <linux-ker...@vger.kernel.org>; Linux Kernel Network Developers > <netdev@vger.kernel.org>; syzkaller-b...@googlegroups.com; Hideaki > YOSHIFUJI <yoshf...@linux-ipv6.org> > Subject: Re: KMSAN: uninit-value in __inet6_bind > > > > On 12/14/2018 07:04 AM, Jon Maloy wrote: > > > > > >> -----Original Message----- > >> From: Cong Wang <xiyou.wangc...@gmail.com> > >> Sent: 12-Dec-18 01:17 > >> To: Dmitry Vyukov <dvyu...@google.com> > >> Cc: syzbot+c56449ed3652e6720...@syzkaller.appspotmail.com; Jon > Maloy > >> <jon.ma...@ericsson.com>; Ying Xue <ying....@windriver.com>; tipc- > >> discuss...@lists.sourceforge.net; David Miller <da...@davemloft.net>; > >> Alexey Kuznetsov <kuz...@ms2.inr.ac.ru>; LKML <linux- > >> ker...@vger.kernel.org>; Linux Kernel Network Developers > >> <netdev@vger.kernel.org>; syzkaller-b...@googlegroups.com; Hideaki > >> YOSHIFUJI <yoshf...@linux-ipv6.org> > >> Subject: Re: KMSAN: uninit-value in __inet6_bind > >> > >> On Tue, Dec 11, 2018 at 1:04 AM Dmitry Vyukov <dvyu...@google.com> > >> wrote: > >>> > >>> On Tue, Dec 11, 2018 at 1:41 AM syzbot > >>> <syzbot+c56449ed3652e6720...@syzkaller.appspotmail.com> 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+c56449ed3652e6720...@syzkaller.appspotmail.com > >>> > >>> This looks like a bug in TIPC, +TIPC maintainers. > >>> > >> > >> It looks more like udp_sock_create6() doesn't initialize > >> udp6_addr.sin6_scope_id. > > > > Unfortunately udp_sock_create6() has no way of knowing this value, > because struct udp_port_cfg is missing a field sin6_scope_id. > > So this has to be fixed first by adding this field to the struct, and then > setting it correctly in all current users. > > > > Do we reasons to believe values other than 0 are needed ? > For TIPC it is ok with 0.
///jon
