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=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 ECD89C433E0 for ; Wed, 17 Mar 2021 05:50:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B8A0464F8C for ; Wed, 17 Mar 2021 05:50:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229675AbhCQFtv (ORCPT ); Wed, 17 Mar 2021 01:49:51 -0400 Received: from mail-il1-f200.google.com ([209.85.166.200]:52131 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229508AbhCQFtT (ORCPT ); Wed, 17 Mar 2021 01:49:19 -0400 Received: by mail-il1-f200.google.com with SMTP id y11so28605339ilc.18 for ; Tue, 16 Mar 2021 22:49:18 -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=9YdkGevB3HdkHkmfKATNeADUt1YQP8td1/6C+RHiBp0=; b=NTB33CEHQkp+DR7F+q+hWWhpKEh0knZWg1UbXS6w9k7wdlPZGJa+nErOVx299p/Ftj CkBTO2liO7jhViS2MZ4iIiztRwaUFhfQaNDx9My3IjIzXuyggaT7XFUPVp5p9T9z6/ZK EQuoBIwV4mBsSdQ4ZN3f3qBgJ/7ugD8MnoSR/QbVno/6x2nVNJPBMMDlBFt6e5tZA6vw D2+Bbu6M86JFa8a74NtyofKo7PKBZQsUZs7NQ1RpRHejYyHmQuOQzw3QQip3S5LyyDmG NFZWrFfjfR8oX8fSP/48F8QiwqD9/nm/Pg2jbvCi2RvMablBdQgPFhEsKypbkhVFNgPz nGYQ== X-Gm-Message-State: AOAM530FMpSWMqSQM+m1RI2hFk7xRvZhad0pGnWB0CmXqpJFQtTM8MQk Y8fWux2QRrmGMFXar03BYMYjWR4zTSQllr3DZRnIRhHxW0we X-Google-Smtp-Source: ABdhPJxqyX+rD7OPc3p2Jp4qhw5m25auzEBBH7JhRWIrnJZ0rgiAfFWEhl4RrGdOA6ClkbKDy5zqFcvLTJ0dAjFT9i4FmZSkeSg9 MIME-Version: 1.0 X-Received: by 2002:a02:604b:: with SMTP id d11mr1592853jaf.128.1615960158449; Tue, 16 Mar 2021 22:49:18 -0700 (PDT) Date: Tue, 16 Mar 2021 22:49:18 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003736df05bdb50bf3@google.com> Subject: [syzbot] KMSAN: uninit-value in iptable_mangle_hook (5) From: syzbot To: coreteam@netfilter.org, davem@davemloft.net, dsahern@kernel.org, fw@strlen.de, glider@google.com, kadlec@netfilter.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pablo@netfilter.org, syzkaller-bugs@googlegroups.com, yoshfuji@linux-ipv6.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 29ad81a1 arch/x86: add missing include to sparsemem.h git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=179b38f6d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=8b976581f6bd1e7d dashboard link: https://syzkaller.appspot.com/bug?extid=9b5e12c49c015d4c1aeb compiler: Debian clang version 11.0.1-2 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+9b5e12c49c015d4c1aeb@syzkaller.appspotmail.com netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. ===================================================== BUG: KMSAN: uninit-value in ipt_mangle_out net/ipv4/netfilter/iptable_mangle.c:61 [inline] BUG: KMSAN: uninit-value in iptable_mangle_hook+0x75a/0x8c0 net/ipv4/netfilter/iptable_mangle.c:81 CPU: 1 PID: 25792 Comm: syz-executor.4 Not tainted 5.11.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:120 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197 ipt_mangle_out net/ipv4/netfilter/iptable_mangle.c:61 [inline] iptable_mangle_hook+0x75a/0x8c0 net/ipv4/netfilter/iptable_mangle.c:81 nf_hook_entry_hookfn include/linux/netfilter.h:136 [inline] nf_hook_slow+0x17b/0x460 net/netfilter/core.c:589 nf_hook include/linux/netfilter.h:256 [inline] __ip_local_out+0x78c/0x840 net/ipv4/ip_output.c:115 ip_local_out+0xa1/0x1e0 net/ipv4/ip_output.c:124 iptunnel_xmit+0x931/0xf20 net/ipv4/ip_tunnel_core.c:82 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190 geneve_xmit_skb drivers/net/geneve.c:959 [inline] geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059 __netdev_start_xmit include/linux/netdevice.h:4778 [inline] netdev_start_xmit include/linux/netdevice.h:4792 [inline] xmit_one+0x2b6/0x760 net/core/dev.c:3574 dev_hard_start_xmit net/core/dev.c:3590 [inline] __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184 packet_snd net/packet/af_packet.c:3006 [inline] packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x714/0x830 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465f69 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fae1692d188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465f69 RDX: 0000000000008844 RSI: 00000000200005c0 RDI: 0000000000000003 RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 0000000000a9fb1f R14: 00007fae1692d300 R15: 0000000000022000 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147 iptunnel_xmit+0xbd6/0xf20 net/ipv4/ip_tunnel_core.c:76 udp_tunnel_xmit_skb+0x526/0x640 net/ipv4/udp_tunnel_core.c:190 geneve_xmit_skb drivers/net/geneve.c:959 [inline] geneve_xmit+0x209e/0x3c20 drivers/net/geneve.c:1059 __netdev_start_xmit include/linux/netdevice.h:4778 [inline] netdev_start_xmit include/linux/netdevice.h:4792 [inline] xmit_one+0x2b6/0x760 net/core/dev.c:3574 dev_hard_start_xmit net/core/dev.c:3590 [inline] __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184 packet_snd net/packet/af_packet.c:3006 [inline] packet_sendmsg+0x8778/0x9a60 net/packet/af_packet.c:3031 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x714/0x830 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline] kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76 slab_alloc_node mm/slub.c:2907 [inline] __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1099 [inline] alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5894 sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2348 packet_alloc_skb net/packet/af_packet.c:2854 [inline] packet_snd net/packet/af_packet.c:2949 [inline] packet_sendmsg+0x6aab/0x9a60 net/packet/af_packet.c:3031 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x714/0x830 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2439 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2439 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 ===================================================== --- 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.