> -----Original Message----- > From: [email protected] <[email protected]> > On Behalf Of Eric Dumazet > Sent: 14-Dec-18 10:15 > To: Jon Maloy <[email protected]>; Cong Wang > <[email protected]>; Dmitry Vyukov <[email protected]> > Cc: [email protected]; Ying Xue > <[email protected]>; [email protected]; David > Miller <[email protected]>; Alexey Kuznetsov <[email protected]>; > LKML <[email protected]>; Linux Kernel Network Developers > <[email protected]>; [email protected]; Hideaki > YOSHIFUJI <[email protected]> > Subject: Re: KMSAN: uninit-value in __inet6_bind > > > > On 12/14/2018 07:04 AM, Jon Maloy wrote: > > > > > >> -----Original Message----- > >> From: Cong Wang <[email protected]> > >> Sent: 12-Dec-18 01:17 > >> To: Dmitry Vyukov <[email protected]> > >> Cc: [email protected]; Jon > Maloy > >> <[email protected]>; Ying Xue <[email protected]>; tipc- > >> [email protected]; David Miller <[email protected]>; > >> Alexey Kuznetsov <[email protected]>; LKML <linux- > >> [email protected]>; Linux Kernel Network Developers > >> <[email protected]>; [email protected]; Hideaki > >> YOSHIFUJI <[email protected]> > >> Subject: Re: KMSAN: uninit-value in __inet6_bind > >> > >> On Tue, Dec 11, 2018 at 1:04 AM Dmitry Vyukov <[email protected]> > >> wrote: > >>> > >>> On Tue, Dec 11, 2018 at 1:41 AM syzbot > >>> <[email protected]> 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: > [email protected] > >>> > >>> 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
