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_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 37015C43387 for ; Tue, 18 Dec 2018 13:01:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 11DBD217D7 for ; Tue, 18 Dec 2018 13:01:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726659AbeLRNBN (ORCPT ); Tue, 18 Dec 2018 08:01:13 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:44813 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726582AbeLRNBE (ORCPT ); Tue, 18 Dec 2018 08:01:04 -0500 Received: by mail-io1-f72.google.com with SMTP id v8so15161681ioh.11 for ; Tue, 18 Dec 2018 05:01:03 -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=/0l0yZRg3yN1XUDF4zL8Ir5+VzxMqUZ8od9Vyhzdc5E=; b=D2SWzx6JcmCvO6fZOAcPOBHkVxm+GSDE4bj0ROOMJPKw6cdlfXVXur1U3o5nsiUXVd eC589w2D56F7UBny3McyKPuDCWmWewuRqkR+EY68XHRu511hO1sAzeAYWkrEkjRy7aQJ +uGPJzzONssx+VNeggsURraTOmTLO7U+yxBYFGMA9Dx94nYPKenQR7luiufdN8zkXxJk kKZ/ZcRxBigBOr6hLORfwzElKedjsEcozojwhy5Ko7RwD9RTbnnXg/2XfqD1w0QEWBHO FJyAbUwvUzHxUvlFAGqzYqx8vhVrutlk4ImFn+4hPzYbFl3wfj87+zBH0YKa7kyuVEjJ vQ6w== X-Gm-Message-State: AA+aEWaXK+5gpGCAhpyIWZOyKv3IdbuGNxiVvnXDFAsbLpwl46+E/Tfs YPtldIypWX1KOGc4RAPyboHG0QBN/Z2IenrzseDbdJaLLczb X-Google-Smtp-Source: AFSGD/U8NjQ1AkGjNutwJ2L3ERUizE3Q6simkJj9jUrQMBT1ViUpDMT/ApPHmXQKq0QMWCjNWtfwQbFg03BTPDqXk8grbyvLUJ/k MIME-Version: 1.0 X-Received: by 2002:a24:294f:: with SMTP id p76mr2346908itp.34.1545138063190; Tue, 18 Dec 2018 05:01:03 -0800 (PST) Date: Tue, 18 Dec 2018 05:01:03 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000062b6fd057d4b7dc2@google.com> Subject: KMSAN: uninit-value in __tipc_nl_bearer_enable From: syzbot To: davem@davemloft.net, glider@google.com, jon.maloy@ericsson.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes 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: 0a602458c72c kmsan: random: another take at unpoisoning CR.. git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=125b568b400000 kernel config: https://syzkaller.appspot.com/x/.config?x=9b071100dcf8e641 dashboard link: https://syzkaller.appspot.com/bug?extid=e820fdc8ce362f2dea51 compiler: clang version 8.0.0 (trunk 348261) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=139c6347400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+e820fdc8ce362f2dea51@syzkaller.appspotmail.com 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KMSAN: uninit-value in strncpy+0x265/0x590 lib/string.c:119 CPU: 0 PID: 8068 Comm: syz-executor5 Not tainted 4.20.0-rc5+ #2 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:113 kmsan_report+0x12d/0x290 mm/kmsan/kmsan.c:682 __msan_warning+0x76/0xc0 mm/kmsan/kmsan_instr.c:316 strncpy+0x265/0x590 lib/string.c:119 bearer_name_validate net/tipc/bearer.c:141 [inline] tipc_enable_bearer net/tipc/bearer.c:246 [inline] __tipc_nl_bearer_enable+0x674/0x1da0 net/tipc/bearer.c:897 tipc_nl_bearer_enable+0x6c/0xb0 net/tipc/bearer.c:905 genl_family_rcv_msg net/netlink/genetlink.c:601 [inline] genl_rcv_msg+0x185f/0x1a60 net/netlink/genetlink.c:626 netlink_rcv_skb+0x444/0x640 net/netlink/af_netlink.c:2477 genl_rcv+0x63/0x80 net/netlink/genetlink.c:637 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0xf80/0x1060 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x129d/0x1310 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] ___sys_sendmsg+0xdbc/0x11d0 net/socket.c:2116 __sys_sendmsg net/socket.c:2154 [inline] __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg+0x305/0x460 net/socket.c:2161 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2161 do_syscall_64+0xcd/0x110 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457669 Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f04f1c0ac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669 RDX: 0000000000000000 RSI: 00000000200008c0 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f04f1c0b6d4 R13: 00000000004c421b R14: 00000000004d7160 R15: 00000000ffffffff Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:247 [inline] kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:170 kmsan_kmalloc+0xa1/0x100 mm/kmsan/kmsan_hooks.c:179 kmsan_slab_alloc+0xe/0x10 mm/kmsan/kmsan_hooks.c:188 slab_post_alloc_hook mm/slab.h:446 [inline] slab_alloc_node mm/slub.c:2759 [inline] __kmalloc_node_track_caller+0xf06/0x1120 mm/slub.c:4383 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0x318/0xa40 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:998 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1182 [inline] netlink_sendmsg+0xba0/0x1310 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] ___sys_sendmsg+0xdbc/0x11d0 net/socket.c:2116 __sys_sendmsg net/socket.c:2154 [inline] __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg+0x305/0x460 net/socket.c:2161 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2161 do_syscall_64+0xcd/0x110 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 ================================================================== --- This bug is generated by a bot. 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