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=-13.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_IN_DEF_DKIM_WL 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 8F7EDC4320A for ; Mon, 16 Aug 2021 09:44:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 683F661B74 for ; Mon, 16 Aug 2021 09:44:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235473AbhHPJp0 (ORCPT ); Mon, 16 Aug 2021 05:45:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235336AbhHPJp0 (ORCPT ); Mon, 16 Aug 2021 05:45:26 -0400 Received: from mail-qt1-x82d.google.com (mail-qt1-x82d.google.com [IPv6:2607:f8b0:4864:20::82d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1AA7EC0613C1 for ; Mon, 16 Aug 2021 02:44:55 -0700 (PDT) Received: by mail-qt1-x82d.google.com with SMTP id z24so13699429qtn.8 for ; Mon, 16 Aug 2021 02:44:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=c3jFYKt2ZEW9qwQtIdp/SYKRbSkw9qr8gK/+SqARdPE=; b=JjyOh+Ny5+y1Msg0xMtuqTz6jmfDcOYT3A8bb5LWMbv0lOckxDscHXKjmPuHbex0Io 56OgA9E4VsKJ88m80rO2qKjRwh6lmVD2KkZMowMx0YMEgROmRqezNyRmb7hd+lhsGA7W oDTbo/1Zu81thv5siPtJ0otX/9Lvi51je/G74635oeO+UPMxV+aaqMxneLqqLNVhmLdv S9YIppPJaLZgVbjF9ftz8qyIpHbfQa9hLzbUdQqCeyI0MqDnuiu7Y+wlD5HMAHUX4boJ x0pGOXbOYAjpZQCBQVk3gfw+BQlsrAJxlLo4Fxj1D4/OdVFTt6EtzfKPQ5ZV6Nk/1dEa HJ1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=c3jFYKt2ZEW9qwQtIdp/SYKRbSkw9qr8gK/+SqARdPE=; b=YOHPUf6fXpBPriN5vvmprJ0S28RcGIG3ekKbRyXnYSyC2+TVRBxgbzahQYsoDjztax mKKX2K0OYDWNywdgzIS75G+nllXiHl2PmCXzO2ekyDz3ZkaqOsNTiLSEE+N14lXyl5Xs iW21h9PuCPqCiiHLHFfMSzN1hzw/PIQyb6f3ZbkVkB8KyzaIt1ndiPDflugAADBz/j7k vyg3gqXWtzEpf4Q6QRssKiPw8v6DsdoZ12yoq8cgaAKVE98rrJh5/MIhkvnfMWGMcOVY P9gKID5kM7YlB4OJ7stqiiIbfuuZQvXi7YlX9xoUZrj2xSjM/4kBciCUwp9mw11d8ve1 t2wA== X-Gm-Message-State: AOAM5325JX7+W/YphO1njTaNUn/mQKmD87rLNiVH7n9HRFv/mHgcxu5I dfv3CD6W+QGLSGEtkkVnbavZQc3gYtrTINuLMsYNag== X-Google-Smtp-Source: ABdhPJy05pZE0kMhsSc2cOxO8mX8agpdU1xELOHA9nDyYaypS+Y7SA3UcXvcOhtNFwrDKHrnZ9GSbUrPGQSoIA3JqFI= X-Received: by 2002:ac8:1493:: with SMTP id l19mr12462170qtj.43.1629107094067; Mon, 16 Aug 2021 02:44:54 -0700 (PDT) MIME-Version: 1.0 References: <0000000000007faf7505c91bb19d@google.com> In-Reply-To: From: Dmitry Vyukov Date: Mon, 16 Aug 2021 11:44:42 +0200 Message-ID: Subject: Re: [syzbot] general protection fault in hwsim_new_edge_nl To: Dongliang Mu Cc: syzbot , Alexander Aring , "David S. Miller" , Jakub Kicinski , linux-kernel , linux-wpan - ML , "open list:NETWORKING [GENERAL]" , Stefan Schmidt , syzkaller-bugs Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org On Mon, 9 Aug 2021 at 10:22, Dongliang Mu wrote: > > On Mon, Aug 9, 2021 at 3:54 PM syzbot > wrote: > > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: c2eecaa193ff pktgen: Remove redundant clone_skb override > > git tree: net-next > > console output: https://syzkaller.appspot.com/x/log.txt?x=1226099a300000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=aba0c23f8230e048 > > dashboard link: https://syzkaller.appspot.com/bug?extid=fafb46da3f65fdbacd16 > > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 > > > > Unfortunately, I don't have any reproducer for this issue yet. > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+fafb46da3f65fdbacd16@syzkaller.appspotmail.com > > > > general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN > > KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] > > Hi all, > > I think the crash can be fixed by [PATCH] ieee802154: hwsim: fix GPF > in hwsim_new_edge_nl [1]. For now, it is in the wpan tree. > > [1] https://lkml.org/lkml/2021/7/8/66 Let's tell syzbot about the fix: #syz fx: ieee802154: hwsim: fix GPF in hwsim_new_edge_nl > > CPU: 1 PID: 1403 Comm: syz-executor.2 Not tainted 5.14.0-rc3-syzkaller #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > > RIP: 0010:nla_len include/net/netlink.h:1148 [inline] > > RIP: 0010:nla_parse_nested_deprecated include/net/netlink.h:1231 [inline] > > RIP: 0010:hwsim_new_edge_nl+0xf4/0x8c0 drivers/net/ieee802154/mac802154_hwsim.c:425 > > Code: 00 0f 85 76 07 00 00 4d 85 ed 48 8b 5b 10 0f 84 5e 05 00 00 e8 0d f2 40 fc 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 87 > > RSP: 0018:ffffc90009a47568 EFLAGS: 00010246 > > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000dd59000 > > RDX: 0000000000000000 RSI: ffffffff8534ab43 RDI: ffff88801c2b44d0 > > RBP: ffffc90009a47678 R08: 0000000000000001 R09: ffffc90009a476a8 > > R10: fffff52001348ed6 R11: 0000000000000000 R12: ffffc90009a47698 > > R13: ffff888025945c14 R14: ffff888071f0cdc0 R15: 0000000000000000 > > FS: 00007f8448923700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 00000000032f4708 CR3: 0000000033eed000 CR4: 00000000001506e0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > Call Trace: > > genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731 > > genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] > > genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792 > > netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 > > genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 > > netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] > > netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 > > netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 > > sock_sendmsg_nosec net/socket.c:704 [inline] > > sock_sendmsg+0xcf/0x120 net/socket.c:724 > > ____sys_sendmsg+0x6e8/0x810 net/socket.c:2403 > > ___sys_sendmsg+0xf3/0x170 net/socket.c:2457 > > __sys_sendmsg+0xe5/0x1b0 net/socket.c:2486 > > do_syscall_x64 arch/x86/entry/common.c:50 [inline] > > do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 > > entry_SYSCALL_64_after_hwframe+0x44/0xae > > RIP: 0033:0x4665e9 > > Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 > > RSP: 002b:00007f8448923188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > > RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 > > RDX: 0000000000000000 RSI: 0000000020001ac0 RDI: 0000000000000004 > > RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 > > R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 > > R13: 00007ffd8ac8e60f R14: 00007f8448923300 R15: 0000000000022000 > > Modules linked in: > > ---[ end trace d1679fe789931133 ]--- > > RIP: 0010:nla_len include/net/netlink.h:1148 [inline] > > RIP: 0010:nla_parse_nested_deprecated include/net/netlink.h:1231 [inline] > > RIP: 0010:hwsim_new_edge_nl+0xf4/0x8c0 drivers/net/ieee802154/mac802154_hwsim.c:425 > > Code: 00 0f 85 76 07 00 00 4d 85 ed 48 8b 5b 10 0f 84 5e 05 00 00 e8 0d f2 40 fc 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 87 > > RSP: 0018:ffffc90009a47568 EFLAGS: 00010246 > > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000dd59000 > > RDX: 0000000000000000 RSI: ffffffff8534ab43 RDI: ffff88801c2b44d0 > > RBP: ffffc90009a47678 R08: 0000000000000001 R09: ffffc90009a476a8 > > R10: fffff52001348ed6 R11: 0000000000000000 R12: ffffc90009a47698 > > R13: ffff888025945c14 R14: ffff888071f0cdc0 R15: 0000000000000000 > > FS: 00007f8448923700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 000055bb2ea2f160 CR3: 0000000033eed000 CR4: 00000000001506f0 > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > > > > --- > > This report 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 issue. See: > > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > > > -- > > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. > > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/0000000000007faf7505c91bb19d%40google.com. > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/CAD-N9QULPO0jNkKr6VxtXb78TSzzFTJ9n%2Ba36h1vruO9q6nhSw%40mail.gmail.com.