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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 69CE6C3524C for ; Sun, 2 Feb 2020 11:51:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 403402067C for ; Sun, 2 Feb 2020 11:51:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726836AbgBBLvP (ORCPT ); Sun, 2 Feb 2020 06:51:15 -0500 Received: from mail-io1-f69.google.com ([209.85.166.69]:45577 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725995AbgBBLvP (ORCPT ); Sun, 2 Feb 2020 06:51:15 -0500 Received: by mail-io1-f69.google.com with SMTP id t12so7440748iog.12 for ; Sun, 02 Feb 2020 03:51:13 -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=gDDCrfJjdDDWz7lybOsk1SBJ7NDoCvpPI4Iv7Ym26Q0=; b=Ms+7f/YJtROIWNOQ9roTkCWjTmjXvad7pCLMPqpNl16Mf0VfvvyJLjeCS24bBhyNG1 O3R7aq3eum3PJFaq8DC5fZDf8Scx7ZmczimP5QXF1x0rMcPSkDwD/mCUT1hwI3tskCXD ifQPXNAZ/crScJqWFhmyZnW1/v3d/jTzFkrZas4jVyzfjmEqr/K32OzluwQJknzhHHY0 Pu5ijEpb1eM666EQ873KISA3NV8GYLEYdCIDTQ4tizRp8i2IFyzZJl0D+ETW338i0Dj5 JeDmVMc99H0jx1lHNFbwH1T7jvtB+KF8OTraxMBQuNgkH/ebW7/43R9N4RiPMhL+7d8k ku+g== X-Gm-Message-State: APjAAAUexvsmXoopcg7S5afRMFdpzs6mJef9BUC8DnBrIN3uHlq51kv0 wA1Cf2/7rgfDUwhdE6nwScGG/jcJkoebSMj3c9KjiE4lMe0t X-Google-Smtp-Source: APXvYqzvwDgZBZuuegEnMtws/mdG1zvPsn97DNuVVZnFS/i+Oz9CAIVTKP6SFs7/+cH/DrWu5GQ5v9ZxW5D6Z7hmQEwxjJLF4yom MIME-Version: 1.0 X-Received: by 2002:a02:a795:: with SMTP id e21mr15049847jaj.1.1580644273174; Sun, 02 Feb 2020 03:51:13 -0800 (PST) Date: Sun, 02 Feb 2020 03:51:13 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006b3d44059d966ca1@google.com> Subject: BUG: unable to handle kernel paging request in netlink_unicast From: syzbot To: ap420073@gmail.com, davem@davemloft.net, herbert@gondor.apana.org.au, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, penguin-kernel@I-love.SAKURA.ne.jp, syzkaller-bugs@googlegroups.com 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: b3a60822 Merge branch 'for-v5.6' of git://git.kernel.org:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1477ae95e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=5766bb49c0bc43b9 dashboard link: https://syzkaller.appspot.com/bug?extid=da7f30a2f1a15a687839 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) 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+da7f30a2f1a15a687839@syzkaller.appspotmail.com kernel tried to execute NX-protected page - exploit attempt? (uid: 0) BUG: unable to handle page fault for address: ffff88809d910a50 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0011) - permissions violation PGD b001067 P4D b001067 PUD 21ffff067 PMD 800000009d8001e3 Oops: 0011 [#1] PREEMPT SMP KASAN CPU: 1 PID: 12558 Comm: syz-executor.2 Not tainted 5.5.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0xffff88809d910a50 Code: 00 00 00 00 00 00 00 00 00 00 86 7a 03 89 ff ff ff ff 00 60 43 aa 80 88 ff ff 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <50> f8 d1 04 00 c9 ff ff 70 55 a7 86 ff ff ff ff c0 81 e4 8c 80 88 RSP: 0018:ffffc90004d1f860 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffff869eea30 RCX: dffffc0000000000 RDX: ffffc900024cb000 RSI: 0000000000005c7e RDI: 0000000000005c7f RBP: ffffc90004d1fb20 R08: dffffc0000000000 R09: ffffed1014d22849 R10: ffffed1014d22849 R11: 0000000000000000 R12: 1ffff11013dabb07 R13: ffff88809ed5d83a R14: 000000000000006e R15: dffffc0000000000 FS: 00007f828b464700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88809d910a50 CR3: 000000009c353000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x766/0x920 net/netlink/af_netlink.c:1328 netlink_sendmsg+0xa2b/0xd40 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [inline] __sys_sendmsg+0x1ed/0x290 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2437 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b349 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:00007f828b463c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f828b4646d4 RCX: 000000000045b349 RDX: 0000000000000000 RSI: 0000000020003e00 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000940 R14: 00000000004ca9e5 R15: 000000000075bf2c Modules linked in: CR2: ffff88809d910a50 ---[ end trace 71a7bd2ec42e29ac ]--- RIP: 0010:0xffff88809d910a50 Code: 00 00 00 00 00 00 00 00 00 00 86 7a 03 89 ff ff ff ff 00 60 43 aa 80 88 ff ff 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <50> f8 d1 04 00 c9 ff ff 70 55 a7 86 ff ff ff ff c0 81 e4 8c 80 88 RSP: 0018:ffffc90004d1f860 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffff869eea30 RCX: dffffc0000000000 RDX: ffffc900024cb000 RSI: 0000000000005c7e RDI: 0000000000005c7f RBP: ffffc90004d1fb20 R08: dffffc0000000000 R09: ffffed1014d22849 R10: ffffed1014d22849 R11: 0000000000000000 R12: 1ffff11013dabb07 R13: ffff88809ed5d83a R14: 000000000000006e R15: dffffc0000000000 FS: 00007f828b464700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88809d910a50 CR3: 000000009c353000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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.