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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 602E2C433DF for ; Tue, 9 Jun 2020 01:09:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3B24A2076C for ; Tue, 9 Jun 2020 01:09:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591664980; bh=PURkuQjDd4uIDSMLujFEZ60c931LKLsJlFRXqNsQ6kw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=a8vGsnU8CKXy8wbGL68n9Bi4yK0whDpA/e73Ab0i6GgexqVThzya4vbExIMaM8dnC 5EUGlZd22PM3bOl6jApjq6QeK6fuae3krplXHiSHpkkvf1fLHvO7B8JIOPxjad5AK1 Fi/3Nqyr4E7BuLlLZlletRa8fd7XJ6kRtRu/1EjU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726871AbgFIBJi (ORCPT ); Mon, 8 Jun 2020 21:09:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:49504 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726981AbgFHXG0 (ORCPT ); Mon, 8 Jun 2020 19:06:26 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B2C772076C; Mon, 8 Jun 2020 23:06:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591657585; bh=PURkuQjDd4uIDSMLujFEZ60c931LKLsJlFRXqNsQ6kw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0KKKP/EfVcoougZuQJA6+xLrYjf9GhGybSTAfw/FbskRW7izHTD+iZHnvodJKy3BE VpN1ehWSzE6DbOH2K73Bcnu7xs5/c+Ttg5fVBblh7DXVLqwCgfItDOZq9xDt2/8SKs x/RgPQTgpXkzMEojPyXDtn/t5bXRHroNYdaktLRs= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 5.7 014/274] media: v4l2-ctrls: v4l2_ctrl_g/s_ctrl*(): don't continue when WARN_ON Date: Mon, 8 Jun 2020 19:01:47 -0400 Message-Id: <20200608230607.3361041-14-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608230607.3361041-1-sashal@kernel.org> References: <20200608230607.3361041-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hans Verkuil [ Upstream commit 7c3bae3f430af6b4fcbdb7272e191e266fd94b45 ] If the v4l2_ctrl_g_ctrl*() or __v4l2_ctrl_s_ctrl*() functions are called for the wrong control type then they call WARN_ON since that is a driver error. But they still continue, potentially overwriting data. Change this to return an error (s_ctrl) or 0 (g_ctrl), just to be safe. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/v4l2-core/v4l2-ctrls.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c index 93d33d1db4e8..452edd06d67d 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls.c +++ b/drivers/media/v4l2-core/v4l2-ctrls.c @@ -3794,7 +3794,8 @@ s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl) struct v4l2_ext_control c; /* It's a driver bug if this happens. */ - WARN_ON(!ctrl->is_int); + if (WARN_ON(!ctrl->is_int)) + return 0; c.value = 0; get_ctrl(ctrl, &c); return c.value; @@ -3806,7 +3807,8 @@ s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl) struct v4l2_ext_control c; /* It's a driver bug if this happens. */ - WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64); + if (WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64)) + return 0; c.value64 = 0; get_ctrl(ctrl, &c); return c.value64; @@ -4215,7 +4217,8 @@ int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val) lockdep_assert_held(ctrl->handler->lock); /* It's a driver bug if this happens. */ - WARN_ON(!ctrl->is_int); + if (WARN_ON(!ctrl->is_int)) + return -EINVAL; ctrl->val = val; return set_ctrl(NULL, ctrl, 0); } @@ -4226,7 +4229,8 @@ int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val) lockdep_assert_held(ctrl->handler->lock); /* It's a driver bug if this happens. */ - WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64); + if (WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64)) + return -EINVAL; *ctrl->p_new.p_s64 = val; return set_ctrl(NULL, ctrl, 0); } @@ -4237,7 +4241,8 @@ int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s) lockdep_assert_held(ctrl->handler->lock); /* It's a driver bug if this happens. */ - WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING); + if (WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING)) + return -EINVAL; strscpy(ctrl->p_new.p_char, s, ctrl->maximum + 1); return set_ctrl(NULL, ctrl, 0); } @@ -4249,7 +4254,8 @@ int __v4l2_ctrl_s_ctrl_area(struct v4l2_ctrl *ctrl, lockdep_assert_held(ctrl->handler->lock); /* It's a driver bug if this happens. */ - WARN_ON(ctrl->type != V4L2_CTRL_TYPE_AREA); + if (WARN_ON(ctrl->type != V4L2_CTRL_TYPE_AREA)) + return -EINVAL; *ctrl->p_new.p_area = *area; return set_ctrl(NULL, ctrl, 0); } -- 2.25.1