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 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 3B48AC433DB for ; Sun, 3 Jan 2021 07:00:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0EF442078E for ; Sun, 3 Jan 2021 07:00:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726397AbhACG7x (ORCPT ); Sun, 3 Jan 2021 01:59:53 -0500 Received: from mail-io1-f71.google.com ([209.85.166.71]:51544 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725829AbhACG7w (ORCPT ); Sun, 3 Jan 2021 01:59:52 -0500 Received: by mail-io1-f71.google.com with SMTP id h206so9928481iof.18 for ; Sat, 02 Jan 2021 22:59:37 -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=SKFTyH6GpSngEjt28zWqwVmWACXNO7dXtaBjX92qW1o=; b=nMxw4JZzzRdBEtQPPQVYH9ZOPI+Ehi1a3UZqkWEa0dggVqaDYkhvR+N1zq9qOj4JEU xcG8Xopo5Vxi5x9ELnh1Y1IBnfnz5NHpzqBaym7nv/mmQ/3plRYYiY2ZILAkPL7CS6fG dsO5nXg7VjKwcDqoWiBmXjygx61VbYMfVkRHitBdBuqBU841qmknPLYnJyzDdXxxxgeT I8foPMRxDYBAnM0fJ5oShbteVvEKzQ3HIHn61vrIp9EUbH1MSqOdZFH4Z82AwQfIATMn SS0n63E1D25UIquJjEWyzf6BUoh7qrEfAe8vXVMoz47fQZW1N8tFPicvmSLlgo+gm4Rd 9xoQ== X-Gm-Message-State: AOAM53045chNDcAFPtxReFFr94Cy53nN3sTVIOVN6U5WfTSbjisbnDHc F/Cj2os5h4Sx3cjpzRl0zy+4VLcUN5G1uiz5vx/Im07ATIpV X-Google-Smtp-Source: ABdhPJx9lgYc0IRnirJhJY5Y5hI/5Ca36a+lcRmG6EQgu7U40hbcm6w6qQUyPvFIIs3dP+vaHTZfQWP6jPqge1KMaDSPN/Q5XZpz MIME-Version: 1.0 X-Received: by 2002:a6b:3f54:: with SMTP id m81mr53996917ioa.113.1609657151611; Sat, 02 Jan 2021 22:59:11 -0800 (PST) Date: Sat, 02 Jan 2021 22:59:11 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000bb654d05b7f98286@google.com> Subject: KMSAN: uninit-value in xfrm_user_rcv_msg_compat From: syzbot To: davem@davemloft.net, glider@google.com, 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: netdev@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 73d62e81 kmsan: random: prevent boot-time reports in _mix_.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=17e7a0eb500000 kernel config: https://syzkaller.appspot.com/x/.config?x=2cdf4151c9653e32 dashboard link: https://syzkaller.appspot.com/bug?extid=f00248cacdd6d71ea79c compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b) userspace arch: i386 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+f00248cacdd6d71ea79c@syzkaller.appspotmail.com netlink: 8 bytes leftover after parsing attributes in process `syz-executor.3'. ===================================================== BUG: KMSAN: uninit-value in xfrm_user_rcv_msg_compat+0x1c7b/0x1ec0 net/xfrm/xfrm_compat.c:562 CPU: 0 PID: 12365 Comm: syz-executor.3 Not tainted 5.10.0-rc4-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+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197 xfrm_user_rcv_msg_compat+0x1c7b/0x1ec0 net/xfrm/xfrm_compat.c:562 xfrm_user_rcv_msg+0x489/0xf20 net/xfrm/xfrm_user.c:2714 netlink_rcv_skb+0x70a/0x820 net/netlink/af_netlink.c:2494 xfrm_netlink_rcv+0xb2/0xf0 net/xfrm/xfrm_user.c:2764 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x11da/0x14b0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x173c/0x1840 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] ____sys_sendmsg+0xc7a/0x1240 net/socket.c:2353 ___sys_sendmsg net/socket.c:2407 [inline] __sys_sendmsg+0x6d5/0x830 net/socket.c:2440 __compat_sys_sendmsg net/compat.c:347 [inline] __do_compat_sys_sendmsg net/compat.c:354 [inline] __se_compat_sys_sendmsg+0xa7/0xc0 net/compat.c:351 __ia32_compat_sys_sendmsg+0x4a/0x70 net/compat.c:351 do_syscall_32_irqs_on arch/x86/entry/common.c:80 [inline] __do_fast_syscall_32+0x102/0x160 arch/x86/entry/common.c:139 do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:162 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:205 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f10549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f550a0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000100 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Local variable ----attrs@xfrm_user_rcv_msg_compat created at: xfrm_user_rcv_msg_compat+0xf7/0x1ec0 net/xfrm/xfrm_compat.c:539 xfrm_user_rcv_msg_compat+0xf7/0x1ec0 net/xfrm/xfrm_compat.c:539 ===================================================== --- This report is generated by a bot. 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