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=-9.0 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 C9B04C433E0 for ; Mon, 10 Aug 2020 15:37:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A944923134 for ; Mon, 10 Aug 2020 15:37:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728898AbgHJPhs (ORCPT ); Mon, 10 Aug 2020 11:37:48 -0400 Received: from mail-il1-f199.google.com ([209.85.166.199]:37406 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728640AbgHJPhT (ORCPT ); Mon, 10 Aug 2020 11:37:19 -0400 Received: by mail-il1-f199.google.com with SMTP id 5so4950643ila.4 for ; Mon, 10 Aug 2020 08:37:19 -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=z1AnOwdvWOgDWEgXiKkcjmRiNUEEMgZuTHLJ/I6p2U0=; b=KpLGxuTBROTCWPtrY+LdNjZk9v2VHfQAauYRO3XBLFfl21OL3UbG2m7YZ1be490DWl 8QEfD8Bwjr/I7YNzhxVq8q8b8Z8gXSh2FlzdTB31ysXF/whAlir1x5ZqjXW5BsGRTP5K 1HFOCn+3+f0ueTMfwfmwNqcJGe5la9VtrWj6zIS+xfPSTHDckGVGn/f0QXcQvSSwdP6B hd+xv1gM1W3Dv70B7CDabgC0d/65B8e01fW/laL7d9DysoH3B8G+yqVcg2leL1heGInK twQbfBFS5zS4uWPJANcw7lGIgLkW5J972HLWt4PWoDLP/e4dX40k+VSqr5HNd0O+qT5y Vqjg== X-Gm-Message-State: AOAM5332qbCE9CHLGpYthfTcIymjniUNXXYRX3pGa2ShrBXjhnsC44Sf KURbxj2ld1wCbCPsXJAlFNt2oai6bZyM3vNWsMThY+iXW1tr X-Google-Smtp-Source: ABdhPJzXLcVGEGL1RIokA2/PYg0AZsJOdunpdyy5jMuU1F4eyFVV7w5W5h7P9PJORJ+cv6ygCXpWaKs/UO+7RBVKWAPhNuhbLQpM MIME-Version: 1.0 X-Received: by 2002:a92:cf09:: with SMTP id c9mr14933190ilo.38.1597073838960; Mon, 10 Aug 2020 08:37:18 -0700 (PDT) Date: Mon, 10 Aug 2020 08:37:18 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d9f93a05ac87ba78@google.com> Subject: KMSAN: uninit-value in hsr_get_node From: syzbot To: alex.shi@linux.alibaba.com, ap420073@gmail.com, davem@davemloft.net, frextrite@gmail.com, glider@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com 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 issue on: HEAD commit: ce8056d1 wip: changed copy_from_user where instrumented git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=1198be02900000 kernel config: https://syzkaller.appspot.com/x/.config?x=3afe005fb99591f dashboard link: https://syzkaller.appspot.com/bug?extid=d205b494fafacf899b18 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) 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+d205b494fafacf899b18@syzkaller.appspotmail.com hsr_slave_0: hsr_addr_subst_dest: Unknown node hsr_slave_1: hsr_addr_subst_dest: Unknown node ===================================================== BUG: KMSAN: uninit-value in hsr_get_node+0x3d3/0x750 net/hsr/hsr_framereg.c:191 CPU: 0 PID: 3953 Comm: syz-executor.5 Not tainted 5.8.0-rc5-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:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 hsr_get_node+0x3d3/0x750 net/hsr/hsr_framereg.c:191 hsr_fill_frame_info net/hsr/hsr_forward.c:315 [inline] hsr_forward_skb+0x90c/0x3600 net/hsr/hsr_forward.c:358 hsr_dev_xmit+0x133/0x230 net/hsr/hsr_device.c:221 __netdev_start_xmit include/linux/netdevice.h:4611 [inline] netdev_start_xmit include/linux/netdevice.h:4625 [inline] xmit_one+0x3cf/0x750 net/core/dev.c:3556 dev_hard_start_xmit net/core/dev.c:3572 [inline] __dev_queue_xmit+0x3aad/0x4470 net/core/dev.c:4131 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4164 __bpf_tx_skb net/core/filter.c:2086 [inline] __bpf_redirect_common net/core/filter.c:2125 [inline] __bpf_redirect+0x1479/0x16b0 net/core/filter.c:2132 ____bpf_clone_redirect net/core/filter.c:2165 [inline] bpf_clone_redirect+0x498/0x650 net/core/filter.c:2137 ___bpf_prog_run+0x4498/0x98e0 kernel/bpf/core.c:1516 __bpf_prog_run512+0x12e/0x190 kernel/bpf/core.c:1694 bpf_test_run+0x52d/0xed0 include/linux/filter.h:734 bpf_prog_test_run_skb+0x1053/0x2ad0 net/bpf/test_run.c:459 bpf_prog_test_run kernel/bpf/syscall.c:2983 [inline] __do_sys_bpf+0xb364/0x1a4c0 kernel/bpf/syscall.c:4135 __se_sys_bpf+0x8e/0xa0 kernel/bpf/syscall.c:4075 __ia32_sys_bpf+0x4a/0x70 kernel/bpf/syscall.c:4075 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2af/0x480 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f1d549 Code: Bad RIP value. RSP: 002b:00000000f55170cc EFLAGS: 00000296 ORIG_RAX: 0000000000000165 RAX: ffffffffffffffda RBX: 000000000000000a RCX: 0000000020000740 RDX: 0000000000000028 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 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:2839 [inline] __kmalloc_node_track_caller+0xeab/0x12e0 mm/slub.c:4478 __kmalloc_reserve net/core/skbuff.c:142 [inline] pskb_expand_head+0x26e/0x1e30 net/core/skbuff.c:1627 skb_ensure_writable+0x4d1/0x590 net/core/skbuff.c:5457 __bpf_try_make_writable net/core/filter.c:1624 [inline] bpf_try_make_writable net/core/filter.c:1630 [inline] bpf_try_make_head_writable net/core/filter.c:1638 [inline] ____bpf_clone_redirect net/core/filter.c:2159 [inline] bpf_clone_redirect+0x26c/0x650 net/core/filter.c:2137 ___bpf_prog_run+0x4498/0x98e0 kernel/bpf/core.c:1516 __bpf_prog_run512+0x12e/0x190 kernel/bpf/core.c:1694 bpf_test_run+0x52d/0xed0 include/linux/filter.h:734 bpf_prog_test_run_skb+0x1053/0x2ad0 net/bpf/test_run.c:459 bpf_prog_test_run kernel/bpf/syscall.c:2983 [inline] __do_sys_bpf+0xb364/0x1a4c0 kernel/bpf/syscall.c:4135 __se_sys_bpf+0x8e/0xa0 kernel/bpf/syscall.c:4075 __ia32_sys_bpf+0x4a/0x70 kernel/bpf/syscall.c:4075 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2af/0x480 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c ===================================================== --- 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.