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=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 69FC0C4363D for ; Thu, 24 Sep 2020 09:42:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A13D2311E for ; Thu, 24 Sep 2020 09:42:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727276AbgIXJmV (ORCPT ); Thu, 24 Sep 2020 05:42:21 -0400 Received: from mail-io1-f78.google.com ([209.85.166.78]:50364 "EHLO mail-io1-f78.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726380AbgIXJmU (ORCPT ); Thu, 24 Sep 2020 05:42:20 -0400 Received: by mail-io1-f78.google.com with SMTP id b16so1938161iod.17 for ; Thu, 24 Sep 2020 02:42:20 -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=5Z29b/4Aq5RLlagrKhDMYCmWTH+Cjp9/dDSEi30fRns=; b=lLpJzKhquyJe1HsGlpHaobXaQIXxavdhXBMcraUmi6Ntmp9b7+LaVjBHbONBl6tlhn jD9L2gq6vq4IPtfIyt4nimHPWXV0SztTUZhaXoMS6lSkQOrto9vi2UY5JE2EdoLxZCPC HGH11Bo75NSY89mesO6t+M/dFqPRTiP2ykAQ0BQOl2LjHyKXjAQWldqiFSDCc5r0281d IfoXtiyfE/0KN9Pws8Oup4kBH2hpsZ/IleOapat47pbWJakkK3HuiV8XROikplmplycP cTwWL9vQ9z7p1sl4y5NuuFiPjsns1zO+v8LCMwTTvW8SdMGqLjgHbEacSXYS+XwEL7M9 XiuA== X-Gm-Message-State: AOAM533GMHHbNPhQwr8KMwYIyrwjabAIHAgf5sRKud47Ed8d3fLqlxYB VC+Insyizng5BiQ3lwjpIBtXLvq8TNYlG/P+H2mx/0J8H3Ha X-Google-Smtp-Source: ABdhPJxJzEjhFWdm19ixZuV1MHyRv/T955N/kjW3qyT3+zklKVK5Cw22Y6ewTYb/RP88s1Kb33R/HhvTaxdkT5XSZspHMJN2N9Ci MIME-Version: 1.0 X-Received: by 2002:a92:d8d0:: with SMTP id l16mr3246663ilo.47.1600940539721; Thu, 24 Sep 2020 02:42:19 -0700 (PDT) Date: Thu, 24 Sep 2020 02:42:19 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002d3bc705b00c04fa@google.com> Subject: KASAN: user-memory-access Read in vdso_fault From: syzbot To: bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: eb5f95f1 Merge tag 's390-5.9-6' of git://git.kernel.org/pu.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1077ecc3900000 kernel config: https://syzkaller.appspot.com/x/.config?x=cd992d74d6c7e62 dashboard link: https://syzkaller.appspot.com/bug?extid=fe2a9f19481e3bfed524 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+fe2a9f19481e3bfed524@syzkaller.appspotmail.com ================================================================== BUG: KASAN: user-memory-access in vdso_fault+0xc1/0x1b0 arch/x86/entry/vdso/vma.c:67 Read of size 8 at addr 000000001953fc48 by task systemd-udevd/9883 CPU: 0 PID: 9883 Comm: systemd-udevd Not tainted 5.9.0-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+0x1d6/0x29e lib/dump_stack.c:118 __kasan_report mm/kasan/report.c:517 [inline] kasan_report+0x151/0x1d0 mm/kasan/report.c:530 vdso_fault+0xc1/0x1b0 arch/x86/entry/vdso/vma.c:67 __do_fault+0x138/0x3b0 mm/memory.c:3450 do_read_fault+0x5a6/0x9e0 mm/memory.c:3843 do_fault mm/memory.c:3971 [inline] handle_pte_fault mm/memory.c:4211 [inline] __handle_mm_fault mm/memory.c:4346 [inline] handle_mm_fault+0x1d73/0x29a0 mm/memory.c:4444 do_user_addr_fault+0x515/0xa90 arch/x86/mm/fault.c:1372 handle_page_fault arch/x86/mm/fault.c:1429 [inline] exc_page_fault+0x129/0x240 arch/x86/mm/fault.c:1482 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:538 RIP: 0033:0x7ffedaddb630 Code: Bad RIP value. RSP: 002b:00007ffedad997b8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000015 RDX: 0000000058585858 RSI: 0000000000000000 RDI: 00007ffedad997e0 RBP: 0000000000000000 R08: 000000000000fefe R09: 0000000000000030 R10: 0000000000000000 R11: 0000000000000206 R12: 000055e855d83675 R13: 00007ffedad99938 R14: 0000000000080000 R15: 000055e855d83660 ================================================================== --- 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.