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,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 76E0FC352BE for ; Thu, 16 Apr 2020 12:43:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60009217D8 for ; Thu, 16 Apr 2020 12:43:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2635904AbgDPMnd (ORCPT ); Thu, 16 Apr 2020 08:43:33 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:45453 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2635975AbgDPMnO (ORCPT ); Thu, 16 Apr 2020 08:43:14 -0400 Received: by mail-io1-f71.google.com with SMTP id y4so19385879ioy.12 for ; Thu, 16 Apr 2020 05:43:13 -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=v779y82BJy6MKZS+0kJTYe+V/6NgiP+kTl/bmTEDrfc=; b=Fs4dVU/5uBZrknMn0TsqeGs+53ggbOQ962zVE3Ya4RpI5WG1kd5ZcdNVrvUGEF//PU 1i0+Z22MkIt6pxTpqPiC6/CW3ZbhJmC4Xm9vGbnXNKDEoY5901dgjZnbBWqQGfK7I7wh CX1OI81gcIexV2fgW0Oov3GP2X8BQzjv9Ww7xGwR/dCf4cGjpP5lcaUH1lYsjWEaAf4b 6QoKDPq69MKu2aUQLJ4cH6Dx/5DsYWAOXEd2KZxkI5o0QqBwXjWJS82fdGi+b34cm9Re 0Bw7ZGnNzrTo8l2gTDksg4UkW8DdDHCn3O9M7tsj52122aK821TfloVXAWsB3SLhZ48r QeFw== X-Gm-Message-State: AGi0PuZkofoSYsGPLMwWc9khrNAXrX1n+O9p1H42TyU00qMm0fVGj+y0 3VWnun/0C0zBHUq4hTdDptAAkiwqHE7cctaqLwwxBYgtpL9I X-Google-Smtp-Source: APiQypKMnYxPxaGGAl2cOD7eeEOXoMXsFbWYPyW/ZxxwTU6g7/qemE6/IycCIRdOSdAIACf+ehAkYyrhfCZKrCrjeNAeOKwjcr2S MIME-Version: 1.0 X-Received: by 2002:a92:750f:: with SMTP id q15mr10663775ilc.146.1587040993304; Thu, 16 Apr 2020 05:43:13 -0700 (PDT) Date: Thu, 16 Apr 2020 05:43:13 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a6661c05a367c669@google.com> Subject: WARNING in fib6_add (4) From: syzbot To: davem@davemloft.net, kuba@kernel.org, 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" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 1a323ea5 x86: get rid of 'errret' argument to __get_user_x.. git tree: bpf-next console output: https://syzkaller.appspot.com/x/log.txt?x=143443b3e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=8c1e98458335a7d1 dashboard link: https://syzkaller.appspot.com/bug?extid=5f122ebd258b7e43e492 compiler: gcc (GCC) 9.0.0 20181231 (experimental) 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+5f122ebd258b7e43e492@syzkaller.appspotmail.com IPv6: NLM_F_REPLACE set, but no existing node found! ------------[ cut here ]------------ WARNING: CPU: 0 PID: 31420 at net/ipv6/ip6_fib.c:1501 fib6_add+0x3405/0x3df0 net/ipv6/ip6_fib.c:1501 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 31420 Comm: syz-executor.4 Not tainted 5.6.0-syzkaller #0 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+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x27b/0x2f0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:175 [inline] fixup_bug arch/x86/kernel/traps.c:170 [inline] do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:fib6_add+0x3405/0x3df0 net/ipv6/ip6_fib.c:1501 Code: df 48 8d bb d0 09 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 7b 08 00 00 48 8b 9b d0 09 00 00 e9 45 f6 ff ff e8 6b 67 b2 fa <0f> 0b 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 20 48 c1 ea 03 80 RSP: 0018:ffffc90015df7488 EFLAGS: 00010202 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90011987000 RDX: 00000000000069f0 RSI: ffffffff86c081f5 RDI: ffff88809a03e3a0 RBP: ffff8880952fb3a0 R08: ffff8880643820c0 R09: ffffed1013edef06 R10: ffffed1013edef05 R11: ffff88809f6f782f R12: 00000000fffffffe R13: 0000000000000000 R14: ffff8880952fb380 R15: 0000000000000000 __ip6_ins_rt+0x4f/0x70 net/ipv6/route.c:1313 ip6_route_add+0x58/0x120 net/ipv6/route.c:3705 inet6_rtm_newroute+0x152/0x160 net/ipv6/route.c:5330 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5454 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6bf/0x7e0 net/socket.c:2362 ___sys_sendmsg+0x100/0x170 net/socket.c:2416 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c889 Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f1f04409c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f1f0440a6d4 RCX: 000000000045c889 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000009f5 R14: 00000000004ccb09 R15: 000000000076bf0c Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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#status for how to communicate with syzbot.