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=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 802DBC4727F for ; Thu, 1 Oct 2020 10:29:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4B47021531 for ; Thu, 1 Oct 2020 10:29:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731972AbgJAK3T (ORCPT ); Thu, 1 Oct 2020 06:29:19 -0400 Received: from mail-io1-f77.google.com ([209.85.166.77]:55858 "EHLO mail-io1-f77.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731647AbgJAK3R (ORCPT ); Thu, 1 Oct 2020 06:29:17 -0400 Received: by mail-io1-f77.google.com with SMTP id t187so3195891iof.22 for ; Thu, 01 Oct 2020 03:29:17 -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=QxfnSPKGQDCFCLiF87wD/G1Td7QoNzVZUJ2E9Aaohoc=; b=AZKsXPysPvycyo2oj4WMR6gdFfvb1OWYyXIX73MnoIl6xujEg5UDOqI9J30qSkCszl 6SsC7sJ7ZPBQx40WrTw2JZDZdGyHbMJJp5LHLxX9ZuV2HEZWYEliUTK0sz6RbHx52kK/ aVtGrXi+DtdYobDWHiUiO1iLKhVTktIr/GE06i4qeeIKEdsINZdm9SUWeamRpQEv/Rnq UrlphdSZV9cZn4MILhPmE7LDp/ZTc0cL+HHIuwDX5zJhjTBQL1Dv3rrP5/MgbKdzhfsP JLpWLcQyTVhJsr1qcHDac36fNwrw3FimnLlhEOKrNGVdF1xPXS4jZTbDOXZU/AC/f9/c s3oQ== X-Gm-Message-State: AOAM533yFhavT3DnFuxzI9dGCeiGvCYiDKsXBTu1FEQZSVeqeXOogygT AcbLH5lAjfIgR0g0/eafTJwASN1adpkySb7iABhdRA3BLmzr X-Google-Smtp-Source: ABdhPJwKuv3/SgAWQSCle5P2lNmjUlMIDW2FcgIk7h6NlfiRO4Mu+/XZouoBmR0Mp4mbLkk0GeBrJnCvMC0vyfYwVCwqIyg/O/6X MIME-Version: 1.0 X-Received: by 2002:a92:9a13:: with SMTP id t19mr1798694ili.269.1601548156895; Thu, 01 Oct 2020 03:29:16 -0700 (PDT) Date: Thu, 01 Oct 2020 03:29:16 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000fb885a05b0997c54@google.com> Subject: KMSAN: uninit-value in batadv_nc_worker From: syzbot To: a@unstable.cc, b.a.t.m.a.n@lists.open-mesh.org, davem@davemloft.net, glider@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, mareklindner@neomailbox.ch, netdev@vger.kernel.org, sven@narfation.org, sw@simonwunderlich.de, 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: 5edb1df2 kmsan: drop the _nosanitize string functions git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=10cc55a7900000 kernel config: https://syzkaller.appspot.com/x/.config?x=4991d22eb136035c dashboard link: https://syzkaller.appspot.com/bug?extid=da9194708de785081f11 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) 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+da9194708de785081f11@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] BUG: KMSAN: uninit-value in batadv_nc_worker+0x1c0/0x1d70 net/batman-adv/network-coding.c:718 CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.9.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker 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:122 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:201 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0x1c0/0x1d70 net/batman-adv/network-coding.c:718 process_one_work+0x1688/0x2140 kernel/workqueue.c:2269 worker_thread+0x10bc/0x2730 kernel/workqueue.c:2415 kthread+0x551/0x590 kernel/kthread.c:293 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:143 [inline] kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:126 kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:80 slab_alloc_node mm/slub.c:2907 [inline] slab_alloc mm/slub.c:2916 [inline] __kmalloc+0x2bb/0x4b0 mm/slub.c:3982 kmalloc_array+0x90/0x140 include/linux/slab.h:594 batadv_hash_new+0x129/0x530 net/batman-adv/hash.c:52 batadv_originator_init+0x9b/0x370 net/batman-adv/originator.c:211 batadv_mesh_init+0x4dc/0x9d0 net/batman-adv/main.c:204 batadv_softif_init_late+0x6d8/0xa30 net/batman-adv/soft-interface.c:857 register_netdevice+0xbbc/0x37d0 net/core/dev.c:9760 __rtnl_newlink net/core/rtnetlink.c:3454 [inline] rtnl_newlink+0x2e77/0x3ed0 net/core/rtnetlink.c:3500 rtnetlink_rcv_msg+0x142b/0x18c0 net/core/rtnetlink.c:5563 netlink_rcv_skb+0x6d7/0x7e0 net/netlink/af_netlink.c:2470 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5581 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x11c8/0x1490 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x173a/0x1840 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg net/socket.c:671 [inline] __sys_sendto+0x9dc/0xc80 net/socket.c:1992 __do_sys_sendto net/socket.c:2004 [inline] __se_sys_sendto+0x107/0x130 net/socket.c:2000 __x64_sys_sendto+0x6e/0x90 net/socket.c:2000 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. 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