Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: KMSAN: uninit-value in __inet6_bind | From | Eric Dumazet <> | Date | Fri, 14 Dec 2018 07:14:46 -0800 |
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On 12/14/2018 07:04 AM, Jon Maloy wrote: > > >> -----Original Message----- >> From: Cong Wang <xiyou.wangcong@gmail.com> >> Sent: 12-Dec-18 01:17 >> To: Dmitry Vyukov <dvyukov@google.com> >> Cc: syzbot+c56449ed3652e6720f30@syzkaller.appspotmail.com; Jon Maloy >> <jon.maloy@ericsson.com>; Ying Xue <ying.xue@windriver.com>; tipc- >> discussion@lists.sourceforge.net; David Miller <davem@davemloft.net>; >> Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>; LKML <linux- >> kernel@vger.kernel.org>; Linux Kernel Network Developers >> <netdev@vger.kernel.org>; syzkaller-bugs@googlegroups.com; Hideaki >> YOSHIFUJI <yoshfuji@linux-ipv6.org> >> Subject: Re: KMSAN: uninit-value in __inet6_bind >> >> On Tue, Dec 11, 2018 at 1:04 AM Dmitry Vyukov <dvyukov@google.com> >> wrote: >>> >>> On Tue, Dec 11, 2018 at 1:41 AM syzbot >>> <syzbot+c56449ed3652e6720f30@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+c56449ed3652e6720f30@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 ?
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