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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 D55CCC433E1 for ; Thu, 18 Jun 2020 17:36:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BC52E2067D for ; Thu, 18 Jun 2020 17:36:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732328AbgFRRgU (ORCPT ); Thu, 18 Jun 2020 13:36:20 -0400 Received: from mail-il1-f200.google.com ([209.85.166.200]:42749 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726899AbgFRRgS (ORCPT ); Thu, 18 Jun 2020 13:36:18 -0400 Received: by mail-il1-f200.google.com with SMTP id j71so4525790ilg.9 for ; Thu, 18 Jun 2020 10:36:18 -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=2hGkj3pgqjZzii+yGvLKkGedjI+miZLqyudGh7JCriU=; b=c1VPRcjxAErL4pPk7MNjO7OXrCbc8KufTFTS0RtGutfr8TKvfOdhv1KjfosEwgUDa/ IF8Lgi2HZ6jf3zH9CQtIbTLA5mXU0pVpmro5CLtYWGtWfjcIOhyNO3vwgD2KjqBcwyRk ysiwLRHFMk5raHhYJPhlQH+oRolMGvLzKuVI3lkXNvvblOOgueBFVQCLnGI8swgRfBBz XgHPzMpab+x2B5TdAD0f1ZcU7oPsgOSk8gyVX/AaAjvsKrtltX4+QTGCbQ994eIxcIDm 4I8u5dfklP9MdAYt5BwlOrw6MnmdxwosYepjDA9yesx+JVVfpw5vDZ7Bbs8eXx+YtjZD eGgg== X-Gm-Message-State: AOAM531c4yztd+mTcY4urQFVjIW1waWl0FbG//YsIjJ8V2jZXmbdA6od hPZWJm++7x4J2dP7briRA/aYhgZHAgfCTjsPMeIsYGyUsxa5 X-Google-Smtp-Source: ABdhPJzTvCc06gUmd5iur0PoN68suH1/NYP/Fkvt6V830f59jikYJEFQR+bvNz2AJDcKP2icSvokS4s9hF26wrj3aZITqm0ixyqu MIME-Version: 1.0 X-Received: by 2002:a6b:14cc:: with SMTP id 195mr3333136iou.117.1592501777584; Thu, 18 Jun 2020 10:36:17 -0700 (PDT) Date: Thu, 18 Jun 2020 10:36:17 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c1d8d405a85f360d@google.com> Subject: KMSAN: uninit-value in hash_ip6_add From: syzbot To: coreteam@netfilter.org, davem@davemloft.net, fw@strlen.de, glider@google.com, gregkh@linuxfoundation.org, jeremy@azazel.net, kadlec@netfilter.org, kstewart@linuxfoundation.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, tglx@linutronix.de 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: f0d5ec90 kmsan: apply __no_sanitize_memory to dotraplinkag.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=126592fa100000 kernel config: https://syzkaller.appspot.com/x/.config?x=86e4f8af239686c6 dashboard link: https://syzkaller.appspot.com/bug?extid=89bacaf2be1277d1e6de compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) 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+89bacaf2be1277d1e6de@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in __read_once_size include/linux/compiler.h:206 [inline] BUG: KMSAN: uninit-value in hash_ip6_add+0x14eb/0x30c0 net/netfilter/ipset/ip_set_hash_gen.h:892 CPU: 1 PID: 31730 Comm: syz-executor.3 Not tainted 5.7.0-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+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 __read_once_size include/linux/compiler.h:206 [inline] hash_ip6_add+0x14eb/0x30c0 net/netfilter/ipset/ip_set_hash_gen.h:892 hash_ip6_uadt+0x8e6/0xad0 net/netfilter/ipset/ip_set_hash_ip.c:267 call_ad+0x2dc/0xbc0 net/netfilter/ipset/ip_set_core.c:1732 ip_set_ad+0xad2/0x1110 net/netfilter/ipset/ip_set_core.c:1820 ip_set_uadd+0xf6/0x110 net/netfilter/ipset/ip_set_core.c:1845 nfnetlink_rcv_msg+0xb86/0xcf0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2469 nfnetlink_rcv+0x3b5/0x3ab0 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x1246/0x14d0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2362 ___sys_sendmsg net/socket.c:2416 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2449 __do_sys_sendmsg net/socket.c:2458 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2456 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2456 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ca59 Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fea85396c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004fe260 RCX: 000000000045ca59 RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000003 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000942 R14: 00000000004cc0a6 R15: 00007fea853976d4 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310 __msan_chain_origin+0x50/0x90 mm/kmsan/kmsan_instr.c:165 ip6_netmask include/linux/netfilter/ipset/pfxlen.h:49 [inline] hash_ip6_netmask net/netfilter/ipset/ip_set_hash_ip.c:185 [inline] hash_ip6_uadt+0x9df/0xad0 net/netfilter/ipset/ip_set_hash_ip.c:263 call_ad+0x2dc/0xbc0 net/netfilter/ipset/ip_set_core.c:1732 ip_set_ad+0xad2/0x1110 net/netfilter/ipset/ip_set_core.c:1820 ip_set_uadd+0xf6/0x110 net/netfilter/ipset/ip_set_core.c:1845 nfnetlink_rcv_msg+0xb86/0xcf0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2469 nfnetlink_rcv+0x3b5/0x3ab0 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x1246/0x14d0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2362 ___sys_sendmsg net/socket.c:2416 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2449 __do_sys_sendmsg net/socket.c:2458 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2456 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2456 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:116 ip_set_get_ipaddr6+0x26a/0x300 net/netfilter/ipset/ip_set_core.c:325 hash_ip6_uadt+0x450/0xad0 net/netfilter/ipset/ip_set_hash_ip.c:255 call_ad+0x2dc/0xbc0 net/netfilter/ipset/ip_set_core.c:1732 ip_set_ad+0xad2/0x1110 net/netfilter/ipset/ip_set_core.c:1820 ip_set_uadd+0xf6/0x110 net/netfilter/ipset/ip_set_core.c:1845 nfnetlink_rcv_msg+0xb86/0xcf0 net/netfilter/nfnetlink.c:229 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2469 nfnetlink_rcv+0x3b5/0x3ab0 net/netfilter/nfnetlink.c:563 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x1246/0x14d0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2362 ___sys_sendmsg net/socket.c:2416 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2449 __do_sys_sendmsg net/socket.c:2458 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2456 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2456 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127 kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:80 slab_alloc_node mm/slub.c:2802 [inline] __kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4436 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0x2fd/0xac0 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1083 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1175 [inline] netlink_sendmsg+0x7d3/0x14d0 net/netlink/af_netlink.c:1893 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2362 ___sys_sendmsg net/socket.c:2416 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2449 __do_sys_sendmsg net/socket.c:2458 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2456 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2456 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x44/0xa9 ===================================================== --- 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.