From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EBBC7633 for ; Wed, 2 Nov 2022 03:32:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 03808C433D7; Wed, 2 Nov 2022 03:32:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667359977; bh=XwSFqAffUa7SWoNgtqbcNHIRKNcouH48VQB0sPQT6co=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jXnVcF9tVOUO0ufZ6FCT6MagJT53cBO0jp0Iq8UnqkUB7YG3h3KpKIfXmpQGuRozq 1w8N1sQeuYM1laoxNhMv6QhcvjAJP+U/6B4UvOtr2KoRV6yCGoKC3WNVFZLDGIJk+e 46HyaYpOISCaepbfodOiY3o0nN9zZhvRwY2hlzdE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.19 66/78] media: v4l2-dv-timings: add sanity checks for blanking values Date: Wed, 2 Nov 2022 03:34:51 +0100 Message-Id: <20221102022054.884427138@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221102022052.895556444@linuxfoundation.org> References: <20221102022052.895556444@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Hans Verkuil [ Upstream commit 4b6d66a45ed34a15721cb9e11492fa1a24bc83df ] Add sanity checks to v4l2_valid_dv_timings() to ensure that the provided blanking values are reasonable. Signed-off-by: Hans Verkuil Fixes: b18787ed1ce3 ([media] v4l2-dv-timings: add new helper module) Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/v4l2-core/v4l2-dv-timings.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-dv-timings.c b/drivers/media/v4l2-core/v4l2-dv-timings.c index af38c989ff33..2c32124c1823 100644 --- a/drivers/media/v4l2-core/v4l2-dv-timings.c +++ b/drivers/media/v4l2-core/v4l2-dv-timings.c @@ -161,6 +161,20 @@ bool v4l2_valid_dv_timings(const struct v4l2_dv_timings *t, (bt->interlaced && !(caps & V4L2_DV_BT_CAP_INTERLACED)) || (!bt->interlaced && !(caps & V4L2_DV_BT_CAP_PROGRESSIVE))) return false; + + /* sanity checks for the blanking timings */ + if (!bt->interlaced && + (bt->il_vbackporch || bt->il_vsync || bt->il_vfrontporch)) + return false; + if (bt->hfrontporch > 2 * bt->width || + bt->hsync > 1024 || bt->hbackporch > 1024) + return false; + if (bt->vfrontporch > 4096 || + bt->vsync > 128 || bt->vbackporch > 4096) + return false; + if (bt->interlaced && (bt->il_vfrontporch > 4096 || + bt->il_vsync > 128 || bt->il_vbackporch > 4096)) + return false; return fnc == NULL || fnc(t, fnc_handle); } EXPORT_SYMBOL_GPL(v4l2_valid_dv_timings); -- 2.35.1