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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 D4AF7C55179 for ; Tue, 27 Oct 2020 17:26:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 825F12224A for ; Tue, 27 Oct 2020 17:26:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603819590; bh=P/bk7xuVHHNBjoKf6h+7mas2/W2ecpQm5r52hVrm8qY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=dE2zaYDrDs5KfmqzHedaQyhCKRHct2zO+MZk4DOqWi7MyFwbZLDPkQMae2DBInD+i XfYzI2O6WdkhSZSOYCpXgHncFl5+pqEmZiyJixFAbKoXE6GIbhuWpdTVh9pzEJ+lkZ 7CZ/xuFNpVz9vo9RwllG9yr6vNShwTEMSk7SFPnk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1818998AbgJ0R0X (ORCPT ); Tue, 27 Oct 2020 13:26:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:52250 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1771566AbgJ0Owd (ORCPT ); Tue, 27 Oct 2020 10:52:33 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B7EFC22258; Tue, 27 Oct 2020 14:52:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603810347; bh=P/bk7xuVHHNBjoKf6h+7mas2/W2ecpQm5r52hVrm8qY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bzL7EF4GMbGiagPm6mF88+55lcO3DQf454CRag/obHp08IemDXMkSrpmnOCxJcijJ LuxcEWmgGOl4QzZ1lIDtwxBJyYUSZvfKE3WUXOLX+/zGYwnKAgBhZxQKlzJtPmjDVA iFDINzllJpWDL4nhYVLhT1M+TQGUVD0ZR64VQAys= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hans Verkuil , Peilin Ye , Mauro Carvalho Chehab , Sasha Levin , syzbot+02d9172bf4c43104cd70@syzkaller.appspotmail.com Subject: [PATCH 5.8 106/633] media: vivid: Fix global-out-of-bounds read in precalculate_color() Date: Tue, 27 Oct 2020 14:47:29 +0100 Message-Id: <20201027135527.648933086@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027135522.655719020@linuxfoundation.org> References: <20201027135522.655719020@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Peilin Ye [ Upstream commit e3158a5e7e661786b3ab650c7e4d21024e8eff0f ] vivid_meta_out_process() is setting `brightness`, `contrast`, `saturation` and `hue` using tpg_s_*(). This is wrong, since tpg_s_*() do not provide range checks. Using tpg_s_*() here also makes the control framework out-of-sync with the actual values. Use v4l2_ctrl_s_ctrl() instead. This issue has been reported by syzbot as an out-of-bounds read bug in precalculate_color(). Reported-and-tested-by: syzbot+02d9172bf4c43104cd70@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=02d9172bf4c43104cd70 Fixes: 746facd39370 ("media: vivid: Add metadata output support") Suggested-by: Hans Verkuil Signed-off-by: Peilin Ye Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/test-drivers/vivid/vivid-meta-out.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/media/test-drivers/vivid/vivid-meta-out.c b/drivers/media/test-drivers/vivid/vivid-meta-out.c index ff8a039aba72e..95835b52b58fc 100644 --- a/drivers/media/test-drivers/vivid/vivid-meta-out.c +++ b/drivers/media/test-drivers/vivid/vivid-meta-out.c @@ -164,10 +164,11 @@ void vivid_meta_out_process(struct vivid_dev *dev, { struct vivid_meta_out_buf *meta = vb2_plane_vaddr(&buf->vb.vb2_buf, 0); - tpg_s_brightness(&dev->tpg, meta->brightness); - tpg_s_contrast(&dev->tpg, meta->contrast); - tpg_s_saturation(&dev->tpg, meta->saturation); - tpg_s_hue(&dev->tpg, meta->hue); + v4l2_ctrl_s_ctrl(dev->brightness, meta->brightness); + v4l2_ctrl_s_ctrl(dev->contrast, meta->contrast); + v4l2_ctrl_s_ctrl(dev->saturation, meta->saturation); + v4l2_ctrl_s_ctrl(dev->hue, meta->hue); + dprintk(dev, 2, " %s brightness %u contrast %u saturation %u hue %d\n", __func__, meta->brightness, meta->contrast, meta->saturation, meta->hue); -- 2.25.1