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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DED29C4332F for ; Thu, 13 Oct 2022 07:11:53 +0000 (UTC) Received: from localhost ([::1]:41002 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oisNk-0006fG-PE for qemu-devel@archiver.kernel.org; Thu, 13 Oct 2022 03:11:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34308) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ois68-0005W4-PJ for qemu-devel@nongnu.org; Thu, 13 Oct 2022 02:53:47 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:56413) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ois67-0006tj-1x for qemu-devel@nongnu.org; Thu, 13 Oct 2022 02:53:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1665644018; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Zz+Qt34oE4M5mrMgManCQwGhH1+sbvEnpgqeJuJljuY=; b=SGXfSgcgMb3XSKbQ7mAhURCgP7pbwzATpsArTSDbcQezF/IiDy0HYbfuE/AvzeVPRbVmi3 xAXyC3uIn8YzToXzBSWh13BgSktPyF2bupAX8IgvbtkWXHWYIcWHoGjAb9GLm0hdF4WAXs aUMpf/oa6u0vL6HgE3MTdC958E0tZec= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-617-0HHEpvmUNPqxI2T_vu6GLg-1; Thu, 13 Oct 2022 02:53:34 -0400 X-MC-Unique: 0HHEpvmUNPqxI2T_vu6GLg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id BFAB929DD9AF; Thu, 13 Oct 2022 06:53:23 +0000 (UTC) Received: from sirius.home.kraxel.org (unknown [10.39.195.183]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 6FAE8140EBF3; Thu, 13 Oct 2022 06:53:20 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 3318718009DB; Thu, 13 Oct 2022 08:52:25 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Cc: David Hildenbrand , Gerd Hoffmann , Kashyap Chamarthy , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Markus Armbruster , Eric Auger , Christian Schoenebeck , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Marcel Apfelbaum , "Michael S. Tsirkin" , Eric Blake , lu zhipeng Subject: [PULL 15/26] cirrus_vga: fix potential memory overflow Date: Thu, 13 Oct 2022 08:52:13 +0200 Message-Id: <20221013065224.1864145-16-kraxel@redhat.com> In-Reply-To: <20221013065224.1864145-1-kraxel@redhat.com> References: <20221013065224.1864145-1-kraxel@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Received-SPF: pass client-ip=170.10.129.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: lu zhipeng Signed-off-by: lu zhipeng Message-Id: <20220929122352.1891-1-luzhipeng@cestc.cn> Signed-off-by: Gerd Hoffmann --- hw/display/cirrus_vga.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c index 3bb6a58698c1..2577005d03ce 100644 --- a/hw/display/cirrus_vga.c +++ b/hw/display/cirrus_vga.c @@ -834,7 +834,7 @@ static void cirrus_bitblt_cputovideo_next(CirrusVGAState * s) word alignment, so we keep them for the next line */ /* XXX: keep alignment to speed up transfer */ end_ptr = s->cirrus_bltbuf + s->cirrus_blt_srcpitch; - copy_count = s->cirrus_srcptr_end - end_ptr; + copy_count = MIN(s->cirrus_srcptr_end - end_ptr, CIRRUS_BLTBUFSIZE); memmove(s->cirrus_bltbuf, end_ptr, copy_count); s->cirrus_srcptr = s->cirrus_bltbuf + copy_count; s->cirrus_srcptr_end = s->cirrus_bltbuf + s->cirrus_blt_srcpitch; -- 2.37.3