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 2A90CC47256 for ; Sat, 2 May 2020 08:59:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1422C20787 for ; Sat, 2 May 2020 08:59:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727849AbgEBI7W (ORCPT ); Sat, 2 May 2020 04:59:22 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:40186 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727831AbgEBI7V (ORCPT ); Sat, 2 May 2020 04:59:21 -0400 Received: by mail-io1-f69.google.com with SMTP id p138so7351945iod.7 for ; Sat, 02 May 2020 01:59:19 -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=Ywzji6QDZvXk0ZcBde6pSZ6jql6pppVQlFIwSdzVTS4=; b=iyme4Q0FZkixfnCSEeIBvr3wSDb8W7ZU/bCBrPXWucm/+4AOtIbvzfwyuldLkeFyv+ smkzFt3hHL96sio0LqwdPvGJEqmqkmlFIC0xivVfCuvGePNUfHB1nW2y5nJ6FNit3u66 WbHDnV508Wr1VLiVnV7i7L5BjwG/qChJ4XBsVoWajMLcJog+SOJtQkRFN1v9LurRQwc5 PvVKs8rapYy/Ia3Md1esQKU3x7wZg4ItJThKmZvDt4/WH+js4EETAIUOdvVmoJ8icWCV ma3JiCpkVAURIsoIm521k4GwRwzCJPaM8lwSIAHD+vtaPmcewiN1Vmmhwpw435n8Oblg RBdQ== X-Gm-Message-State: AGi0Pubyl1So2u/5PRNtDXCDe2fshEfDSq78xzHCvzRFSYb0fPz1QI12 K574UH6VYdWdJul+kJ93fhl+DUtvJFIyEOJV4/LdHITWYcNZ X-Google-Smtp-Source: APiQypJwe/QtiAdOMw0gg7Juii1+8c/8AdO98fvxzwSQCgaqOMbSqCF+kNPf6lF5yJ9UeT1YoICCgRp5DDiXxJnxxf/u5miIWFK9 MIME-Version: 1.0 X-Received: by 2002:a92:d8ca:: with SMTP id l10mr7408148ilo.118.1588409959328; Sat, 02 May 2020 01:59:19 -0700 (PDT) Date: Sat, 02 May 2020 01:59:19 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000622fdd05a4a6831d@google.com> Subject: KASAN: global-out-of-bounds Read in inet_diag_bc_sk From: syzbot To: andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, kuba@kernel.org, kuznet@ms2.inr.ac.ru, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.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: 4b4976a6 Merge branch 'net-ReST-part-three' git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=13e3824c100000 kernel config: https://syzkaller.appspot.com/x/.config?x=b1494ce3fbc02154 dashboard link: https://syzkaller.appspot.com/bug?extid=3f4c9f04a6740870299e 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+3f4c9f04a6740870299e@syzkaller.appspotmail.com ================================================================== BUG: KASAN: global-out-of-bounds in cgroup_id include/linux/cgroup.h:312 [inline] BUG: KASAN: global-out-of-bounds in inet_diag_bc_sk+0xb6e/0xc70 net/ipv4/inet_diag.c:749 Read of size 8 at addr ffffffff8d22eed0 by task syz-executor.2/16922 CPU: 1 PID: 16922 Comm: syz-executor.2 Not tainted 5.7.0-rc2-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 print_address_description.constprop.0.cold+0x5/0x315 mm/kasan/report.c:382 __kasan_report.cold+0x35/0x4d mm/kasan/report.c:511 kasan_report+0x33/0x50 mm/kasan/common.c:625 cgroup_id include/linux/cgroup.h:312 [inline] inet_diag_bc_sk+0xb6e/0xc70 net/ipv4/inet_diag.c:749 inet_diag_dump_icsk+0xbe4/0x1306 net/ipv4/inet_diag.c:1061 __inet_diag_dump+0x8d/0x240 net/ipv4/inet_diag.c:1113 netlink_dump+0x50b/0xf50 net/netlink/af_netlink.c:2245 __netlink_dump_start+0x63f/0x910 net/netlink/af_netlink.c:2353 netlink_dump_start include/linux/netlink.h:246 [inline] inet_diag_handler_cmd+0x263/0x2c0 net/ipv4/inet_diag.c:1278 __sock_diag_cmd net/core/sock_diag.c:233 [inline] sock_diag_rcv_msg+0x2fe/0x3e0 net/core/sock_diag.c:264 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469 sock_diag_rcv+0x26/0x40 net/core/sock_diag.c:275 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 sock_write_iter+0x289/0x3c0 net/socket.c:1004 call_write_iter include/linux/fs.h:1907 [inline] do_iter_readv_writev+0x5a8/0x850 fs/read_write.c:694 do_iter_write fs/read_write.c:999 [inline] do_iter_write+0x18b/0x600 fs/read_write.c:980 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1072 do_writev+0x27f/0x300 fs/read_write.c:1115 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c829 Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f6839177c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 000000000050d140 RCX: 000000000045c829 RDX: 0000000000000001 RSI: 00000000200000c0 RDI: 0000000000000007 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000d18 R14: 00000000004cb1f4 R15: 00007f68391786d4 The buggy address belongs to the variable: __key.82892+0x30/0x40 Memory state around the buggy address: ffffffff8d22ed80: fa fa fa fa 00 00 fa fa fa fa fa fa 00 00 fa fa ffffffff8d22ee00: fa fa fa fa 00 fa fa fa fa fa fa fa 00 00 fa fa >ffffffff8d22ee80: fa fa fa fa 00 00 fa fa fa fa fa fa 00 00 fa fa ^ ffffffff8d22ef00: fa fa fa fa 00 00 fa fa fa fa fa fa 00 00 fa fa ffffffff8d22ef80: fa fa fa fa 00 00 fa fa fa fa fa fa 00 00 fa fa ================================================================== --- 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.