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 8B46FC433DF for ; Sat, 27 Jun 2020 07:17:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6F3C22080C for ; Sat, 27 Jun 2020 07:17:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726116AbgF0HRQ (ORCPT ); Sat, 27 Jun 2020 03:17:16 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:46492 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725900AbgF0HRN (ORCPT ); Sat, 27 Jun 2020 03:17:13 -0400 Received: by mail-io1-f70.google.com with SMTP id z65so6352986iof.13 for ; Sat, 27 Jun 2020 00:17:12 -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=IsMH+mXeozfn9dfFmwoLPcz9puu1DMjtE0f+O1IgldQ=; b=KTzrfj6cUCTqKrjwy9eXsGDHKOsHPxa7khp/kplL0PQicyw2WUELvjH6SCrZKML+WV Md9zU2PCAM+fAtHqDsyFj1DjeC7quzOqlShVWkmsP4EtHBE3aTdWE3KP6MTe4/YfD36u ZbOOhZcQq5Bep2PWRfcSttduheJESR/tYfrX6YoNoY091KW9fof8C8PWgRunutWN+Rv3 megjRkTmRwyaXIcLr3hrHFtZYzOQXONrUFeA6BMJD90tnY1zWzgbVUMfJG32jn4zzPTS Qib7xNm/yGDBcIabIywxVuRG7FOGDt+JsWeQQ3SfmnK/Fnw/4WRNdwXQL4hDySzz5AJI hV1g== X-Gm-Message-State: AOAM530PgeYcAV2Mo6Ld42vOrJYCJlK6CmDAIcHTVFv3nCP/xtq4NsVF XDw/2jw6FBViiLoA4LBW2DUAw/YeHNilM+AZxzJW+nFIpavb X-Google-Smtp-Source: ABdhPJwKhI2xCErDjvcakGLd7G8m7X+MVGs3aP4wfTV4QSW0Zb2ZKsqysJOEwh4Ny9JtbJzQb/K8+ZiLzqGktDLG29BrbwbwWQG0 MIME-Version: 1.0 X-Received: by 2002:a5d:8516:: with SMTP id q22mr7332943ion.130.1593242232128; Sat, 27 Jun 2020 00:17:12 -0700 (PDT) Date: Sat, 27 Jun 2020 00:17:12 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000498aa905a90b9dd0@google.com> Subject: KASAN: vmalloc-out-of-bounds Read in __cfg8NUM_wpan_dev_from_attrs From: syzbot To: alex.aring@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-wpan@vger.kernel.org, netdev@vger.kernel.org, stefan@datenfreihafen.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 7a64135f libbpf: Adjust SEC short cut for expected attach .. git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=1365a5c5100000 kernel config: https://syzkaller.appspot.com/x/.config?x=dcc6334acae363d4 dashboard link: https://syzkaller.appspot.com/bug?extid=b108a9b0cf438a20f4f8 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+b108a9b0cf438a20f4f8@syzkaller.appspotmail.com netlink: 26 bytes leftover after parsing attributes in process `syz-executor.5'. ================================================================== BUG: KASAN: vmalloc-out-of-bounds in nla_get_u32 include/net/netlink.h:1541 [inline] BUG: KASAN: vmalloc-out-of-bounds in __cfg802154_wpan_dev_from_attrs+0x4b4/0x510 net/ieee802154/nl802154.c:53 Read of size 4 at addr ffffc90001ad9018 by task syz-executor.5/31529 CPU: 1 PID: 31529 Comm: syz-executor.5 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_get_u32 include/net/netlink.h:1541 [inline] __cfg802154_wpan_dev_from_attrs+0x4b4/0x510 net/ieee802154/nl802154.c:53 nl802154_prepare_wpan_dev_dump.constprop.0+0xf9/0x490 net/ieee802154/nl802154.c:245 nl802154_dump_llsec_dev+0xc0/0xb10 net/ieee802154/nl802154.c:1655 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: 0033:0x45cb19 Code: Bad RIP value. RSP: 002b:00007ff9558abc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000502400 RCX: 000000000045cb19 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a38 R14: 00000000004cd1fc R15: 00007ff9558ac6d4 Memory state around the buggy address: ffffc90001ad8f00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ffffc90001ad8f80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 >ffffc90001ad9000: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ^ ffffc90001ad9080: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 ffffc90001ad9100: 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.