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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6ACB3C433FE for ; Wed, 2 Feb 2022 14:36:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345047AbiBBOgM (ORCPT ); Wed, 2 Feb 2022 09:36:12 -0500 Received: from mail-il1-f197.google.com ([209.85.166.197]:34780 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229610AbiBBOgK (ORCPT ); Wed, 2 Feb 2022 09:36:10 -0500 Received: by mail-il1-f197.google.com with SMTP id a18-20020a923312000000b002b384dccc91so14205698ilf.1 for ; Wed, 02 Feb 2022 06:36:10 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=Eymh4pHURRqeuFwS8adn0p8QhOCEykcqbl9dEc138NY=; b=qhnrGtdPioJ8Gb/MtQGjqHA2rdQSdnIIy41tsjqO1w9pWa2Lx1VZDVlnFANzSKowBE gWsUD9MXAgCZKcf0EnBmjs1ZAC7M3fA7jlaFc/gxmyelOL0bgipnVvueU599ARPB07Dw U44twp9rODEGXsKg7CiUtqnitUr2Z6BC0Khoxo8Ih3Q8mcYvdWdUHTeoO/ZLagB32AEf 7FjaJ5WAncvKkii1YM2FZpJ05w2mL1Y871qB//A0YHcIybRx5+/bjVue5EIr9PP3/Iu4 31RzBe/CLJUlci0tv9/PMUMcc4b3uFN3zWyfPxSE1HwCHAmYZ5K4CgPbblcHVqxjDAXc pp9w== X-Gm-Message-State: AOAM532p3bvPJce4Jn436JoUAPiTHoDPnQPDOMpCcJb0WVE+HI3P7MDo fpgSFZKJBEB6wZYTX11AHxBp2FX1B3u5giLjUNIGZvJwZam6 X-Google-Smtp-Source: ABdhPJwGogskVKanVKmmmO1deCNQWTYAR4unUVwG5nX2dggT73jsD2XxfgJcLs4y20Iwprc8IHZ1DEukzWl+iHfMi84JlWn5xHSa MIME-Version: 1.0 X-Received: by 2002:a05:6602:2e90:: with SMTP id m16mr16733470iow.74.1643812569793; Wed, 02 Feb 2022 06:36:09 -0800 (PST) Date: Wed, 02 Feb 2022 06:36:09 -0800 In-Reply-To: <0000000000000a9b7d05d6ee565f@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004cc7f905d709f0f6@google.com> Subject: Re: [syzbot] KASAN: vmalloc-out-of-bounds Write in ringbuf_map_alloc From: syzbot To: akpm@linux-foundation.org, andreyknvl@google.com, andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, elver@google.com, glider@google.com, hotforest@gmail.com, houtao1@huawei.com, john.fastabend@gmail.com, kafai@fb.com, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, sfr@canb.auug.org.au, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this issue to: commit c34cdf846c1298de1c0f7fbe04820fe96c45068c Author: Andrey Konovalov Date: Wed Feb 2 01:04:27 2022 +0000 kasan, vmalloc: unpoison VM_ALLOC pages after mapping bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=128cb900700000 start commit: 6abab1b81b65 Add linux-next specific files for 20220202 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=118cb900700000 console output: https://syzkaller.appspot.com/x/log.txt?x=168cb900700000 kernel config: https://syzkaller.appspot.com/x/.config?x=b8d8750556896349 dashboard link: https://syzkaller.appspot.com/bug?extid=5ad567a418794b9b5983 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1450d9f0700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=130ef35bb00000 Reported-by: syzbot+5ad567a418794b9b5983@syzkaller.appspotmail.com Fixes: c34cdf846c12 ("kasan, vmalloc: unpoison VM_ALLOC pages after mapping") For information about bisection process see: https://goo.gl/tpsmEJ#bisection