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=-0.7 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 7CB6AC433DF for ; Sat, 27 Jun 2020 07:18:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5ADCA2080C for ; Sat, 27 Jun 2020 07:18:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726177AbgF0HSP (ORCPT ); Sat, 27 Jun 2020 03:18:15 -0400 Received: from mail-il1-f199.google.com ([209.85.166.199]:43276 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725994AbgF0HSN (ORCPT ); Sat, 27 Jun 2020 03:18:13 -0400 Received: by mail-il1-f199.google.com with SMTP id y13so8041489ila.10 for ; Sat, 27 Jun 2020 00:18:12 -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=NpmgWhWDWqZRxtggc0PGsmPYy4RDj6z7UbjPEip7q2k=; b=VQeUoGS52IhRV3DrnihQ7PwI6+pp8CiS8++erl8Bebu8sCH5ZuRo36kMGh1J5PGNlh XhBHieQbagi+fwuPSp2dWkuAMVcvihOjxs7e11S1o8iwf4WC85dZ4KzHeMwzKSybAlnx /cLXrY0nnsA61VEYhc/HF/tiT2wrsjiWJaeNAyV/3riM0zUI31A8oHHE24W8vvuVCUYK jrDX2K9yqxhkdKIXKO11Ol0uJfimg12pxRan9DXh+AGHA3E/lr8zhZLeCvLJCc+JPOkp ZfXFtJ3cv8Tcm6ylwuQB/QBYF6f/oEjrZ/pPFN8Emx+T/LaK9AgCCXPEAEAe4LQFu5or 3I+Q== X-Gm-Message-State: AOAM5322rUs0vo1LzPr4SK7Hv4hX0F+ptrnfEqO0LSQvgzbuvR4PJgWb 0xleub21HNlFG3aAzSz6Uvk0jMSG/+Aol8P6rQt34ozBBH4a X-Google-Smtp-Source: ABdhPJyt0CkYD6D8p3fNcZlUQDSfjIc2RD6ROx5N5e2wDLBdOwEDZZhWqPTxSFdYB/M7bXHPT0TyDmK5HEYdN//DwZBNTMdknH/X MIME-Version: 1.0 X-Received: by 2002:a6b:8f09:: with SMTP id r9mr7251035iod.168.1593242292311; Sat, 27 Jun 2020 00:18:12 -0700 (PDT) Date: Sat, 27 Jun 2020 00:18:12 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000dfdbe905a90ba06d@google.com> Subject: KASAN: vmalloc-out-of-bounds Read in __nla_validate_parse From: syzbot To: davem@davemloft.net, jmaloy@redhat.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.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: 4e15507f libbpf: Forward-declare bpf_stats_type for system.. git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=12805f53100000 kernel config: https://syzkaller.appspot.com/x/.config?x=dcc6334acae363d4 dashboard link: https://syzkaller.appspot.com/bug?extid=314cd606fbedf9d5d0b2 compiler: gcc (GCC) 10.1.0-syz 20200507 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+314cd606fbedf9d5d0b2@syzkaller.appspotmail.com netlink: 'syz-executor.3': attribute type 2 has an invalid length. ================================================================== BUG: KASAN: vmalloc-out-of-bounds in nla_next include/net/netlink.h:1160 [inline] BUG: KASAN: vmalloc-out-of-bounds in __nla_validate_parse+0x1ebc/0x21a0 lib/nlattr.c:521 Read of size 2 at addr ffffc900019f9018 by task syz-executor.3/6260 CPU: 0 PID: 6260 Comm: syz-executor.3 Not tainted 5.8.0-rc1-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+0x18f/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x436 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 nla_next include/net/netlink.h:1160 [inline] __nla_validate_parse+0x1ebc/0x21a0 lib/nlattr.c:521 __nla_parse+0x3d/0x4a lib/nlattr.c:630 nla_parse_nested_deprecated include/net/netlink.h:1218 [inline] tipc_nl_publ_dump+0x239/0xce0 net/tipc/socket.c:3766 genl_lock_dumpit+0x7f/0xb0 net/netlink/genetlink.c:575 netlink_dump+0x4cd/0xf60 net/netlink/af_netlink.c:2245 __netlink_dump_start+0x643/0x900 net/netlink/af_netlink.c:2353 genl_family_rcv_msg_dumpit+0x2ac/0x310 net/netlink/genetlink.c:638 genl_family_rcv_msg net/netlink/genetlink.c:733 [inline] genl_rcv_msg+0x797/0x9e0 net/netlink/genetlink.c:753 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2469 genl_rcv+0x24/0x40 net/netlink/genetlink.c:764 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2352 ___sys_sendmsg+0xf3/0x170 net/socket.c:2406 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2439 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ca59 Code: Bad RIP value. RSP: 002b:00007f14b9253c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000501e40 RCX: 000000000045ca59 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a2b R14: 00000000004cd0f1 R15: 00007f14b92546d4 Memory state around the buggy address: ffffc900019f8f00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ffffc900019f8f80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 >ffffc900019f9000: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ^ ffffc900019f9080: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ffffc900019f9100: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ================================================================== --- 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.