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=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 75DB8C2BBCA for ; Tue, 15 Dec 2020 08:07:27 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2E71A222B6 for ; Tue, 15 Dec 2020 08:07:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2E71A222B6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CF3D46E175; Tue, 15 Dec 2020 08:06:58 +0000 (UTC) Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) by gabe.freedesktop.org (Postfix) with ESMTPS id 556906E218 for ; Mon, 14 Dec 2020 13:46:11 +0000 (UTC) Received: by mail-io1-f70.google.com with SMTP id t23so10975565ioh.0 for ; Mon, 14 Dec 2020 05:46:11 -0800 (PST) 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=u5uOJTkvi9oLcz7eMTJJP02g8EDZk0rHridQXPr2iyA=; b=CuB/sdquinjiVxbN62Kor9Fb7N8lB74KyuAgQHE/lYuy8sDaoQWqPA+aJyi42zptEU EFyP/t7y9ZhBnfkLjsdcpzwIWFX/nW/9KdkYZGJT3lyEGWhpwQ5swh165NC6hWwsTGX0 KWEAmDeiBTK+NGWUVxk3AUCJzPEnJcZnJPeuhVEIFQ98oF5B9dAfkPgCaYkP3FjEwy5+ ReocT0I4SvLwcCah2LHsspA6yWyElGvTKbjAScOziOTyzm6VJwKcptpJJII4/LKilAer 8tKjp6qE+jctq7ZLh73FjsLSamnq+0lst5OHdiu9Flf7c0s9MaYoc79vISCT590zuYWi 4l2w== X-Gm-Message-State: AOAM530nRDSdh8IcR/DjfX9aCjet8Q2SdJxRP8BLfOpwkFc083QZiXbZ vFKNEc8mAGhNx32gdwD+l2rdpXrIvb1gBoOYOn/3ECdVmdQ4 X-Google-Smtp-Source: ABdhPJw30Zf+SQWT4CZg+eXyhFKthUhneApcpWHnyF2LbdX5WYe+Qia53e6TuouwwLQaVEigd+Q2wIqtoMj2DZQzRnP6aZNujfO7 MIME-Version: 1.0 X-Received: by 2002:a05:6602:150b:: with SMTP id g11mr32252338iow.88.1607953570678; Mon, 14 Dec 2020 05:46:10 -0800 (PST) Date: Mon, 14 Dec 2020 05:46:10 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000654c9c05b66cdd73@google.com> Subject: KASAN: vmalloc-out-of-bounds Read in drm_fb_helper_dirty_work (2) From: syzbot To: airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, syzkaller-bugs@googlegroups.com, tzimmermann@suse.de X-Mailman-Approved-At: Tue, 15 Dec 2020 08:06:55 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hello, syzbot found the following issue on: HEAD commit: a2f5ea9e Merge tag 'arm-soc-fixes-v5.10-4b' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=167b497b500000 kernel config: https://syzkaller.appspot.com/x/.config?x=868cd1c95c02180 dashboard link: https://syzkaller.appspot.com/bug?extid=cc9acdabdf6ea0c8dc0b compiler: gcc (GCC) 10.1.0-syz 20200507 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+cc9acdabdf6ea0c8dc0b@syzkaller.appspotmail.com ================================================================== BUG: KASAN: vmalloc-out-of-bounds in memcpy include/linux/string.h:399 [inline] BUG: KASAN: vmalloc-out-of-bounds in drm_fb_helper_dirty_blit_real drivers/gpu/drm/drm_fb_helper.c:403 [inline] BUG: KASAN: vmalloc-out-of-bounds in drm_fb_helper_dirty_work+0x42e/0x810 drivers/gpu/drm/drm_fb_helper.c:435 Read of size 3168 at addr ffffc9000b8613a0 by task kworker/0:5/11875 CPU: 0 PID: 11875 Comm: kworker/0:5 Not tainted 5.10.0-rc7-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Workqueue: events drm_fb_helper_dirty_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x497 mm/kasan/report.c:385 __kasan_report mm/kasan/report.c:545 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:192 memcpy+0x20/0x60 mm/kasan/common.c:105 memcpy include/linux/string.h:399 [inline] drm_fb_helper_dirty_blit_real drivers/gpu/drm/drm_fb_helper.c:403 [inline] drm_fb_helper_dirty_work+0x42e/0x810 drivers/gpu/drm/drm_fb_helper.c:435 process_one_work+0x933/0x15a0 kernel/workqueue.c:2272 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Memory state around the buggy address: ffffc9000b861280: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9000b861300: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 >ffffc9000b861380: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc9000b861400: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9000b861480: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ================================================================== --- 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. _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel