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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by aws-us-west-2-korg-lkml-1.web.codeaurora.org (Postfix) with ESMTP id 8DF4DC433EF for ; Fri, 15 Jun 2018 07:30:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 43A46208B2 for ; Fri, 15 Jun 2018 07:30:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 43A46208B2 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 S1755825AbeFOHaF (ORCPT ); Fri, 15 Jun 2018 03:30:05 -0400 Received: from mail-it0-f70.google.com ([209.85.214.70]:38717 "EHLO mail-it0-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755573AbeFOHaD (ORCPT ); Fri, 15 Jun 2018 03:30:03 -0400 Received: by mail-it0-f70.google.com with SMTP id l6-v6so1159746itb.3 for ; Fri, 15 Jun 2018 00:30:03 -0700 (PDT) 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=fVDfq3wQ3KJ2beUUzk7G9KPDGcp3z0O7IKNkT+bWGHo=; b=oDeFylrArJZauZSUde+SSsfzlhfKFAuVPKCYHVzDiVb4B0Et7ZYypRmtYgMzSr5BqH z00xV5yCluEq1exw5Wo32URXQ/9SsyKcwGVOpW5RkFxRXuIdZkxAFdfkgdfjxM7J6DuU aweOQy7ZB7CMSdXb0Dp6VAwr/7ocb1qbA4T0hN4ine3aa4XvKGH0o6Oqb8+8iQbulFhE VcBZq2z72q8WEAPn1K+fzXnMlrvdfo2UMVEj1MDKJKjwePBJ3lW6tsyccKAnr8qIL0SL ULxHgd9yXOLJrvQXdeVqMF5N3w87XcIYPmT/Mk7pOS3EClDEukXGrkpa1sgvylwz2/EO T1nQ== X-Gm-Message-State: APt69E1U7DMTUbWDwnU3PlNIvHCNbHHqT7Dh7WhvfF9pO4h/0HF63Ns+ 7RYbBGQA8xIHSwHpQgkT8gjTXBt4Q9eSmQ5EVOYONAh9ziiN X-Google-Smtp-Source: ADUXVKJgbAWSyIvMqyqGTez7QwKpD7JkzzB+nnt5CGF0XUD1TsH8lHX2BgXspHeWULamh+oCADYtQTQ1JVpM2P4L7bBcmWajBMV/ MIME-Version: 1.0 X-Received: by 2002:a24:5dd4:: with SMTP id w203-v6mr90404ita.27.1529047802643; Fri, 15 Jun 2018 00:30:02 -0700 (PDT) Date: Fri, 15 Jun 2018 00:30:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001f31eb056ea92fcb@google.com> Subject: KMSAN: uninit-value in xfrm_state_find From: syzbot To: davem@davemloft.net, herbert@gondor.apana.org.au, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, steffen.klassert@secunet.com, syzkaller-bugs@googlegroups.com 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: 1df165c8d2d6 kmsan: introduce kmsan_clear_user_page() git tree: https://github.com/google/kmsan.git/master console output: https://syzkaller.appspot.com/x/log.txt?x=15336e97800000 kernel config: https://syzkaller.appspot.com/x/.config?x=4ca1e57bafa8ab1f dashboard link: https://syzkaller.appspot.com/bug?extid=131cd4c6d21724b99a26 compiler: clang version 7.0.0 (trunk 329391) syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=12c7a417800000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13710197800000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+131cd4c6d21724b99a26@syzkaller.appspotmail.com IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KMSAN: uninit-value in __arch_swab32 arch/x86/include/uapi/asm/swab.h:10 [inline] BUG: KMSAN: uninit-value in __fswab32 include/uapi/linux/swab.h:59 [inline] BUG: KMSAN: uninit-value in __xfrm6_daddr_saddr_hash net/xfrm/xfrm_hash.h:29 [inline] BUG: KMSAN: uninit-value in __xfrm_dst_hash net/xfrm/xfrm_hash.h:96 [inline] BUG: KMSAN: uninit-value in xfrm_dst_hash net/xfrm/xfrm_state.c:60 [inline] BUG: KMSAN: uninit-value in xfrm_state_find+0x2b15/0x4f40 net/xfrm/xfrm_state.c:952 CPU: 0 PID: 4464 Comm: syz-executor988 Not tainted 4.17.0-rc3+ #93 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+0x185/0x1d0 lib/dump_stack.c:113 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1084 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683 __arch_swab32 arch/x86/include/uapi/asm/swab.h:10 [inline] __fswab32 include/uapi/linux/swab.h:59 [inline] __xfrm6_daddr_saddr_hash net/xfrm/xfrm_hash.h:29 [inline] __xfrm_dst_hash net/xfrm/xfrm_hash.h:96 [inline] xfrm_dst_hash net/xfrm/xfrm_state.c:60 [inline] xfrm_state_find+0x2b15/0x4f40 net/xfrm/xfrm_state.c:952 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1393 [inline] xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:1437 [inline] xfrm_resolve_and_create_bundle+0xc31/0x5270 net/xfrm/xfrm_policy.c:1833 xfrm_lookup+0x606/0x39d0 net/xfrm/xfrm_policy.c:2163 xfrm_lookup_route+0xfa/0x360 net/xfrm/xfrm_policy.c:2283 ip_route_output_flow+0x35b/0x3b0 net/ipv4/route.c:2574 udp_sendmsg+0x2289/0x33f0 net/ipv4/udp.c:1006 udpv6_sendmsg+0x1291/0x3f40 net/ipv6/udp.c:1175 inet_sendmsg+0x48d/0x740 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg net/socket.c:639 [inline] ___sys_sendmsg+0xec0/0x1310 net/socket.c:2117 __sys_sendmmsg+0x490/0x850 net/socket.c:2212 __do_sys_sendmmsg net/socket.c:2241 [inline] __se_sys_sendmmsg net/socket.c:2238 [inline] __x64_sys_sendmmsg+0x11c/0x170 net/socket.c:2238 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4419c9 RSP: 002b:00007ffdb3fa4608 EFLAGS: 00000217 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004419c9 RDX: 0000000000000001 RSI: 0000000020002000 RDI: 0000000000000003 RBP: 00000000006cd018 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004026c0 R13: 0000000000402750 R14: 0000000000000000 R15: 0000000000000000 Local variable description: ----fl4_stack@udp_sendmsg Variable was created at: udp_sendmsg+0xe5/0x33f0 net/ipv4/udp.c:841 udpv6_sendmsg+0x1291/0x3f40 net/ipv6/udp.c:1175 ================================================================== --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches