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 C3162C433F5 for ; Tue, 29 Mar 2022 22:02:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235660AbiC2WE0 (ORCPT ); Tue, 29 Mar 2022 18:04:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235595AbiC2WEY (ORCPT ); Tue, 29 Mar 2022 18:04:24 -0400 Received: from mail-lj1-x234.google.com (mail-lj1-x234.google.com [IPv6:2a00:1450:4864:20::234]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35075175385; Tue, 29 Mar 2022 15:02:40 -0700 (PDT) Received: by mail-lj1-x234.google.com with SMTP id 17so25256578ljw.8; Tue, 29 Mar 2022 15:02:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :references:from:in-reply-to; bh=GFh+hu29pLGd1yFJqG3TD5ib8w39W4JQGiYky9bmdEA=; b=Uul80CmlA5J9+LprVKWbEBNT+SmpX7fuHJuj2ZcNq5lQoGbXiK7l08X9mWZUnyQ9xj JGG6phzP2JIgAVM7Ck+/uPDofSFZS9DiEe+vTdfqlpktGqi5ac7BkNwpDuVFGoxB1j/L kiTUpYuWVv1NpO5CD/u3+wXPH+VkKXOxXU0EKfbfEIs9OIrNH5DeSfkqq0ywl+G16oUs EjjTffPfQWSLwPTUxIsp9apeOAkSzbzkNz+6u6mon973oumaMEcdCiHqApsz0Veblhsd qGyeBpLbqSDPrXgY78vgDjWeIZHmYGtPl54GxQn+x5B1VeLWM6M7Ui77iW8/TQ/Q1xEu yH0g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:references:from:in-reply-to; bh=GFh+hu29pLGd1yFJqG3TD5ib8w39W4JQGiYky9bmdEA=; b=QTZ6asthYglorU/F7oLyGZ9cRfytm8GAX3IHw7yrVzMqOxEqabJWlUB/DrqZf+55cB QG8oF3V0zdD4RPNqsqLxcL7kOGq5twy52DkMybyz3dS3/aSd3Wy/0ypqXR/LvYistaek YyNw84d+tTaGxVe1KlxwITGinYOXkLA8WZJobVD3Vio5vg/vRA92N9W0UTpcvHxerMqP ++JumkdHJzTrsdjghuFnxFq/SB+o3m4+5SWzGGDz0WuUFoFmax8D3BAqUPqR9he43bxi YK90bp+3DICwZpI/AhA0jSqVd/1RCuSXyjImnQlDGVm/mQAsHBESjJIPNlJeg/LbS3nt uhSQ== X-Gm-Message-State: AOAM531QncgtY/96RR74Nej+3w5U9y7r1yjRLT2lbIJdS6ui1C/I5YCd HYF1CNxoE3cjS9lkKDP3nbo= X-Google-Smtp-Source: ABdhPJwoHVOneGk1MKkV++hihnKGasRhaKJqXGRhP23iN10zifJJPhye88xL0pFF5DtY6cv59xPRXg== X-Received: by 2002:a2e:b7c1:0:b0:249:7a91:bba1 with SMTP id p1-20020a2eb7c1000000b002497a91bba1mr4503477ljo.276.1648591358215; Tue, 29 Mar 2022 15:02:38 -0700 (PDT) Received: from [192.168.1.11] ([94.103.225.225]) by smtp.gmail.com with ESMTPSA id i2-20020a196d02000000b004488dae6d45sm2114104lfc.52.2022.03.29.15.02.36 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 29 Mar 2022 15:02:37 -0700 (PDT) Content-Type: multipart/mixed; boundary="------------787Zf0iirh0AwihTJK1ygKXK" Message-ID: <419a9bb8-cb68-8add-e7be-275a48b2126d@gmail.com> Date: Wed, 30 Mar 2022 01:02:36 +0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 Subject: Re: [syzbot] general protection fault in dma_fence_array_first Content-Language: en-US To: syzbot , christian.koenig@amd.com, daniel.vetter@ffwll.ch, dri-devel@lists.freedesktop.org, gustavo@padovan.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, sumit.semwal@linaro.org, syzkaller-bugs@googlegroups.com References: <0000000000008eedfe05db620952@google.com> From: Pavel Skripkin In-Reply-To: <0000000000008eedfe05db620952@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a multi-part message in MIME format. --------------787Zf0iirh0AwihTJK1ygKXK Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 3/30/22 00:23, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 8515d05bf6bc Add linux-next specific files for 20220328 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=1694e21b700000 > kernel config: https://syzkaller.appspot.com/x/.config?x=530c68bef4e2b8a8 > dashboard link: https://syzkaller.appspot.com/bug?extid=5c943fe38e86d615cac2 > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1467313b700000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=121b7cb9700000 > > The issue was bisected to: > > commit 519f490db07e1a539490612f376487f61e48e39c > Author: Christian König > Date: Fri Mar 11 09:32:26 2022 +0000 > > dma-buf/sync-file: fix warning about fence containers > There is ZERO_PTR dereference caused by passing 0 to krealloc_array(). Code should not try to reduce allocated memory area if index is equal to 0 #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master With regards, Pavel Skripkin --------------787Zf0iirh0AwihTJK1ygKXK Content-Type: text/plain; charset=UTF-8; name="ph" Content-Disposition: attachment; filename="ph" Content-Transfer-Encoding: base64 ZGlmZiAtLWdpdCBhL2RyaXZlcnMvZG1hLWJ1Zi9zeW5jX2ZpbGUuYyBiL2RyaXZlcnMvZG1h LWJ1Zi9zeW5jX2ZpbGUuYwppbmRleCBiOGRlYTRlYzEyM2IuLjYwY2I0MjY2ZTc3ZiAxMDA2 NDQKLS0tIGEvZHJpdmVycy9kbWEtYnVmL3N5bmNfZmlsZS5jCisrKyBiL2RyaXZlcnMvZG1h LWJ1Zi9zeW5jX2ZpbGUuYwpAQCAtMjY0LDcgKzI2NCw3IEBAIHN0YXRpYyBzdHJ1Y3Qgc3lu Y19maWxlICpzeW5jX2ZpbGVfbWVyZ2UoY29uc3QgY2hhciAqbmFtZSwgc3RydWN0IHN5bmNf ZmlsZSAqYSwKIAlpZiAoaW5kZXggPT0gMCkKIAkJYWRkX2ZlbmNlKGZlbmNlcywgJmluZGV4 LCBkbWFfZmVuY2VfZ2V0X3N0dWIoKSk7CiAKLQlpZiAobnVtX2ZlbmNlcyA+IGluZGV4KSB7 CisJaWYgKGluZGV4ICYmIG51bV9mZW5jZXMgPiBpbmRleCkgewogCQlzdHJ1Y3QgZG1hX2Zl bmNlICoqdG1wOwogCiAJCS8qIEtlZXAgZ29pbmcgZXZlbiB3aGVuIHJlZHVjaW5nIHRoZSBz aXplIGZhaWxlZCAqLwo= --------------787Zf0iirh0AwihTJK1ygKXK--