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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 BC5DAC04AB5 for ; Thu, 6 Jun 2019 13:52:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9D14620693 for ; Thu, 6 Jun 2019 13:52:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728624AbfFFNwU (ORCPT ); Thu, 6 Jun 2019 09:52:20 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:50734 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727522AbfFFNwM (ORCPT ); Thu, 6 Jun 2019 09:52:12 -0400 Received: by mail-io1-f70.google.com with SMTP id m26so178423ioh.17 for ; Thu, 06 Jun 2019 06:52:11 -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=yRMkhc7yuKfa2dw31vxobwmwLPW+9z7XoM/maofKdPk=; b=D4J7eQvW4wAvbK3TL3pw2uiKmm2DMqEXbFtw49zLPcAQKVPay40GsQ6O+N+b5xX8ZG jpddqET3navqZEu9gxFyffEWnXtAnFGuYP3kV2JfjervKRGhFpfuXt1TCf2GILLXpFJk CctWVe1/kAbTI1qS8J6LBH8xKyE6gP2iRj5tdFSu9p4+05RxB28xJ1oGErdw282PlSj0 v17BFp45HUe7QaL+h7ts+sN3VfhvKlnHYCK/JrVUG/V8n3NJf3zVrjnD1Ri9GuNIHgFI Rpb8GEPT0ZuiV2N+gDsXrf9tUI2W4scaLvhCABeuHf/t1zFocexCv+FKRhqVZ1roiPH0 Hmgw== X-Gm-Message-State: APjAAAUqzLngsqSc7Nzdhj0xJNyhWhiTrX2FSMVkECsSh8dPyKlqu4OW SI0RXTjx26EVKhfKqvObQomnAU9MrUZnxs+Txkdbcde0QAbI X-Google-Smtp-Source: APXvYqxsOSemHsUbujSph9lEzIDYC7+nk5LCzhefqqwo192xfbCeFrUgqyeODNjVlpcURg4PEu+WR9j7lfp6hBZjNe0whweIPjv3 MIME-Version: 1.0 X-Received: by 2002:a6b:4f14:: with SMTP id d20mr14000242iob.219.1559829131378; Thu, 06 Jun 2019 06:52:11 -0700 (PDT) Date: Thu, 06 Jun 2019 06:52:11 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004945f1058aa80556@google.com> Subject: KASAN: slab-out-of-bounds Read in corrupted (2) From: syzbot To: akpm@linux-foundation.org, cai@lca.pw, crecklin@redhat.com, keescook@chromium.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.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: 156c0591 Merge tag 'linux-kselftest-5.2-rc4' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13512d51a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=60564cb52ab29d5b dashboard link: https://syzkaller.appspot.com/bug?extid=9a901acbc447313bfe3e compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11a4b01ea00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+9a901acbc447313bfe3e@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in vsnprintf+0x1727/0x19a0 lib/vsprintf.c:2503 Read of size 8 at addr ffff8880a91c7d00 by task syz-executor.0/9821 CPU: 0 PID: 9821 Comm: syz-executor.0 Not tainted 5.2.0-rc3+ #13 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Allocated by task 1024: (stack is not available) Freed by task 2310999008: ------------[ cut here ]------------ Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected to SLAB object 'skbuff_head_cache' (offset 24, size 1)! WARNING: CPU: 0 PID: 9821 at mm/usercopy.c:78 usercopy_warn+0xeb/0x110 mm/usercopy.c:78 Kernel panic - not syncing: panic_on_warn set ... Shutting down cpus with NMI Kernel Offset: disabled --- 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. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches