From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.6 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E611C04EB8 for ; Tue, 11 Dec 2018 00:41:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 002672084C for ; Tue, 11 Dec 2018 00:41:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 002672084C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728985AbeLKAlF (ORCPT ); Mon, 10 Dec 2018 19:41:05 -0500 Received: from mail-io1-f71.google.com ([209.85.166.71]:34569 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727447AbeLKAlF (ORCPT ); Mon, 10 Dec 2018 19:41:05 -0500 Received: by mail-io1-f71.google.com with SMTP id y19so12888310ioq.1 for ; Mon, 10 Dec 2018 16:41:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=l8j2mIhAnEkrN5lXG8UENM+g/gEwiNp9xNedHU5EGL8=; b=rawm93kHEgknWyrgLYNqBEarUPYtI2yrKpighONguZdZJ3kGYPFgtNZsmIuicVZqCd GKQE5fvk/DO8pyVZbBgdAE40ePIwA76OxMdlIGCbqOQprVjxOPnN0w13Wc6EjEcZwap5 ZgVmJpqTeaDFHqO5JRE6Zf7SKFDskGIAgy9QvEevVQK0O77oj2dbpAcBXSMF/Un3g56V 49NxkcTV/i/lvsBiybA2FyS4t+vV2rBBoZnkO8ZUI8/+MdNv3JukrewenmWjzojFLreJ uA+/Im4E+Gdh6UCNo0GqUZmdTAPMcjXVbfW9fl1thdmfJX8vcseg7v1yDqUOiEHTwKSC SxZw== X-Gm-Message-State: AA+aEWZ1rusw2+1/7T+Ww3bCJ+9SXwY07I0SYNnTOUfqlIa+3lfsVtxh 3NU6W4wc/SMdQnJ/5vnqZNyZxXEXrIivcoRhqcPbn9KCPG90 X-Google-Smtp-Source: AFSGD/UYOdsB/lHuqUEA0O6xfb+KGY8xfJtre6ZrIRbwDeGK7sBsaet63P7H3NH+ohzQOIW6do4Mza2gihrQAvmvXw9NmG//lEsJ MIME-Version: 1.0 X-Received: by 2002:a24:6fd1:: with SMTP id x200mr436132itb.26.1544488863752; Mon, 10 Dec 2018 16:41:03 -0800 (PST) Date: Mon, 10 Dec 2018 16:41:03 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001568af057cb456a8@google.com> Subject: KMSAN: uninit-value in __inet6_bind From: syzbot To: davem@davemloft.net, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, yoshfuji@linux-ipv6.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Started in network mode Own node identity fe8000000000000000000000000000bb, cluster identity 4711 ================================================================== BUG: KMSAN: uninit-value in __inet6_bind+0xb72/0x1ad0 net/ipv6/af_inet6.c:340 CPU: 0 PID: 8376 Comm: syz-executor3 Not tainted 4.20.0-rc5+ #111 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x284/0x3b0 lib/dump_stack.c:113 kmsan_report+0x12d/0x290 mm/kmsan/kmsan.c:684 __msan_warning+0x76/0xc0 mm/kmsan/kmsan_instr.c:316 __inet6_bind+0xb72/0x1ad0 net/ipv6/af_inet6.c:340 inet6_bind+0x27f/0x390 net/ipv6/af_inet6.c:441 kernel_bind+0xc6/0xf0 net/socket.c:3230 udp_sock_create6+0x2ee/0x890 net/ipv6/ip6_udp_tunnel.c:39 udp_sock_create include/net/udp_tunnel.h:61 [inline] tipc_udp_enable+0x166f/0x1d70 net/tipc/udp_media.c:742 tipc_enable_bearer net/tipc/bearer.c:302 [inline] __tipc_nl_bearer_enable+0x1213/0x1da0 net/tipc/bearer.c:897 tipc_nl_bearer_enable+0x6c/0xb0 net/tipc/bearer.c:905 genl_family_rcv_msg net/netlink/genetlink.c:601 [inline] genl_rcv_msg+0x185f/0x1a60 net/netlink/genetlink.c:626 netlink_rcv_skb+0x444/0x640 net/netlink/af_netlink.c:2477 genl_rcv+0x63/0x80 net/netlink/genetlink.c:637 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0xfc5/0x10a0 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x1298/0x13e0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] ___sys_sendmsg+0xdbc/0x11d0 net/socket.c:2116 __sys_sendmsg net/socket.c:2154 [inline] __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg+0x305/0x460 net/socket.c:2161 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2161 do_syscall_64+0xcd/0x110 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457659 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f82ebc52c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457659 RDX: 0000000000000000 RSI: 00000000200008c0 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f82ebc536d4 R13: 00000000004c421b R14: 00000000004d7160 R15: 00000000ffffffff Local variable description: ----udp6_addr@udp_sock_create6 Variable was created at: udp_sock_create6+0x80/0x890 net/ipv6/ip6_udp_tunnel.c:17 udp_sock_create include/net/udp_tunnel.h:61 [inline] tipc_udp_enable+0x166f/0x1d70 net/tipc/udp_media.c:742 ================================================================== --- This bug is generated by a bot. 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