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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 765EBC43466 for ; Mon, 21 Sep 2020 14:56:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 385FC20735 for ; Mon, 21 Sep 2020 14:56:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726584AbgIUO4V (ORCPT ); Mon, 21 Sep 2020 10:56:21 -0400 Received: from mail-il1-f205.google.com ([209.85.166.205]:43555 "EHLO mail-il1-f205.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726430AbgIUO4V (ORCPT ); Mon, 21 Sep 2020 10:56:21 -0400 Received: by mail-il1-f205.google.com with SMTP id t11so11292969ilj.10 for ; Mon, 21 Sep 2020 07:56:20 -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=X494KYDH9UJUyj96W5LQtORQMzd+WMrT10MmALrBCuk=; b=lSlPwn/8NUABoc92CW8ND8oJR7tzAlCQqDfyQ72dCk4sX7kVKhkx81QL5usY/7eCHj WxSwA4hU8kYvo7g+O996WcwxsOIHw61B6T94sRE2t3cVny1OeWhr8Ae4K+GrFJQo6ZH8 DbAjQfh49unAm2+9ipiuFrIDlbEkS/M4pE3lUhOfLA2awDLUYWbMRKD7wrE8H9XLerke vV6BoVhC3A9ZZ96Xs1wkYqLihR1e9XwOhgzu35a9lOv7o3x5QJ3mHaDi0TJuZ0Fi8lUt C7TW/u+tZcpm03TOgBPuAwySnfDLDIhGz0LJrNVGwIdQsVut1rveBh4KC7v6NhkQRkcE cAgw== X-Gm-Message-State: AOAM530Z4EmhPDH6XibfSAGvbczbIIdrGkEOIPDT/WI1K8RzKygqzi8X vpW28Jz6O7HGiywCZ44UnhCjChDG920AtiHQf2Z0cAF+ePTf X-Google-Smtp-Source: ABdhPJx0BHqSrjQ0MKpr5g0u4KiHtoaqea2CXDOLFPmsTbEgZiYCW2oia/g9YAKq5Jx6CxAmJd1OR2rHoCwcRPm/iQzTQCAPNttY MIME-Version: 1.0 X-Received: by 2002:a6b:7017:: with SMTP id l23mr36545774ioc.120.1600700180053; Mon, 21 Sep 2020 07:56:20 -0700 (PDT) Date: Mon, 21 Sep 2020 07:56:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009fc91605afd40d89@google.com> Subject: KASAN: stack-out-of-bounds Read in xfrm_selector_match (2) From: syzbot To: davem@davemloft.net, herbert@gondor.apana.org.au, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, steffen.klassert@secunet.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: eb5f95f1 Merge tag 's390-5.9-6' of git://git.kernel.org/pu.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13996ad5900000 kernel config: https://syzkaller.appspot.com/x/.config?x=ffe85b197a57c180 dashboard link: https://syzkaller.appspot.com/bug?extid=577fbac3145a6eb2e7a5 compiler: gcc (GCC) 10.1.0-syz 20200507 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+577fbac3145a6eb2e7a5@syzkaller.appspotmail.com ================================================================== BUG: KASAN: stack-out-of-bounds in xfrm_flowi_dport include/net/xfrm.h:877 [inline] BUG: KASAN: stack-out-of-bounds in __xfrm6_selector_match net/xfrm/xfrm_policy.c:216 [inline] BUG: KASAN: stack-out-of-bounds in xfrm_selector_match+0xf36/0xf60 net/xfrm/xfrm_policy.c:229 Read of size 2 at addr ffffc9001914f55c by task syz-executor.4/15633 CPU: 0 PID: 15633 Comm: syz-executor.4 Not tainted 5.9.0-rc5-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+0x198/0x1fd lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x497 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 xfrm_flowi_dport include/net/xfrm.h:877 [inline] __xfrm6_selector_match net/xfrm/xfrm_policy.c:216 [inline] xfrm_selector_match+0xf36/0xf60 net/xfrm/xfrm_policy.c:229 xfrm_state_look_at.constprop.0+0x144/0x3f0 net/xfrm/xfrm_state.c:1022 xfrm_state_find+0x1a16/0x4d50 net/xfrm/xfrm_state.c:1092 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2384 [inline] xfrm_tmpl_resolve+0x2f3/0xd40 net/xfrm/xfrm_policy.c:2429 xfrm_resolve_and_create_bundle+0x123/0x2590 net/xfrm/xfrm_policy.c:2719 xfrm_lookup_with_ifid+0x235/0x2130 net/xfrm/xfrm_policy.c:3053 xfrm_lookup net/xfrm/xfrm_policy.c:3177 [inline] xfrm_lookup_route+0x36/0x1e0 net/xfrm/xfrm_policy.c:3188 ip_route_output_flow+0xa6/0xc0 net/ipv4/route.c:2769 udp_sendmsg+0x1a16/0x26c0 net/ipv4/udp.c:1201 udpv6_sendmsg+0x14dd/0x2b90 net/ipv6/udp.c:1344 inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:638 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x331/0x810 net/socket.c:2353 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407 __sys_sendmmsg+0x195/0x480 net/socket.c:2497 __do_sys_sendmmsg net/socket.c:2526 [inline] __se_sys_sendmmsg net/socket.c:2523 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2523 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5f9 Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8aa009cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000027a40 RCX: 000000000045d5f9 RDX: 00000000000005c3 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 000000000118cf88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 000000000169fb6f R14: 00007f8aa009d9c0 R15: 000000000118cf4c addr ffffc9001914f55c is located in stack of task syz-executor.4/15633 at offset 220 in frame: udp_sendmsg+0x0/0x26c0 net/ipv4/udp.c:2708 this frame has 5 objects: [32, 40) 'rt' [64, 104) 'ipc' [144, 200) 'fl4_stack' [240, 296) 'cork' [336, 408) 'opt_copy' Memory state around the buggy address: ffffc9001914f400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9001914f480: f1 f1 f1 f1 00 f2 f2 f2 00 00 00 00 00 f2 f2 f2 >ffffc9001914f500: f2 f2 00 00 00 00 00 00 00 f2 f2 f2 f2 f2 00 00 ^ ffffc9001914f580: 00 00 00 00 00 f2 f2 f2 f2 f2 00 00 00 00 00 00 ffffc9001914f600: 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 ================================================================== --- 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.