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 C663BB676 for ; Mon, 6 Jan 2025 10:39:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736159958; cv=none; b=gvtFy+kzQUqqAfTgdkF7HKzDhO9zpRDpXy6q4PdB2vOPwOYwmH2+22SFxSWg/ojJAnAwdOAyPmbU17oCF0FwTQtmxBxOTUE7kenHFIF22aWCDSOZbbwiW2j00Oavbtxgk4LoCI2JF3nVOlXxLnm1B/D4PnQw6qTjrcoQwgDNa68= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736159958; c=relaxed/simple; bh=dZuWBZZlqq8WOxZ3sUPdlgAm2jom80HYG3Hvydhf8Sw=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=L50tlwjD1c64IbyymjpsNp6ZOZtHjKilZHgINt4+MYdEI7lEMEmGx0ugIXKRce+4Mu/ak349/s5C5qrPTzF77G2vxdLdxpYWnK+wtxnxT9mDVT9qGi+lORR4UZknsWBXW6cSPdmUwPZC1MhbwAhyneIfF7a7qbvEAIRKGOXkYRg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=A0sL/uEN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="A0sL/uEN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 087C4C4CEDD; Mon, 6 Jan 2025 10:39:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1736159956; bh=dZuWBZZlqq8WOxZ3sUPdlgAm2jom80HYG3Hvydhf8Sw=; h=Subject:To:Cc:From:Date:From; b=A0sL/uENU7RfA6H4HY/W59Awd7SWHRTfPGiJdJSX4Ms0cKsfNMOys3A9PpP6JglCv 9xDxYOcqBntgx982YS31sPAHyVOsCRts+RjtuU6MeMnCShRYBK5Mx6eJLA0aEqOI9g cedNFLySZnd52GEQSsBzVRa79Rv439inkR1PFhIA= Subject: FAILED: patch "[PATCH] drm: adv7511: Fix use-after-free in adv7533_attach_dsi()" failed to apply to 5.15-stable tree To: biju.das.jz@bp.renesas.com,dmitry.baryshkov@linaro.org,laurent.pinchart+renesas@ideasonboard.com Cc: From: Date: Mon, 06 Jan 2025 11:39:05 +0100 Message-ID: <2025010605-quit-rockfish-a0e8@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 81adbd3ff21c1182e06aa02c6be0bfd9ea02d8e8 # git commit -s git send-email --to '' --in-reply-to '2025010605-quit-rockfish-a0e8@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 81adbd3ff21c1182e06aa02c6be0bfd9ea02d8e8 Mon Sep 17 00:00:00 2001 From: Biju Das Date: Tue, 19 Nov 2024 19:20:29 +0000 Subject: [PATCH] drm: adv7511: Fix use-after-free in adv7533_attach_dsi() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The host_node pointer was assigned and freed in adv7533_parse_dt(), and later, adv7533_attach_dsi() uses the same. Fix this use-after-free issue by dropping of_node_put() in adv7533_parse_dt() and calling of_node_put() in error path of probe() and also in the remove(). Fixes: 1e4d58cd7f88 ("drm/bridge: adv7533: Create a MIPI DSI device") Cc: stable@vger.kernel.org Reviewed-by: Laurent Pinchart Signed-off-by: Biju Das Link: https://patchwork.freedesktop.org/patch/msgid/20241119192040.152657-2-biju.das.jz@bp.renesas.com Signed-off-by: Dmitry Baryshkov diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index eb5919b38263..a13b3d8ab6ac 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -1241,8 +1241,10 @@ static int adv7511_probe(struct i2c_client *i2c) return ret; ret = adv7511_init_regulators(adv7511); - if (ret) - return dev_err_probe(dev, ret, "failed to init regulators\n"); + if (ret) { + dev_err_probe(dev, ret, "failed to init regulators\n"); + goto err_of_node_put; + } /* * The power down GPIO is optional. If present, toggle it from active to @@ -1363,6 +1365,8 @@ static int adv7511_probe(struct i2c_client *i2c) i2c_unregister_device(adv7511->i2c_edid); uninit_regulators: adv7511_uninit_regulators(adv7511); +err_of_node_put: + of_node_put(adv7511->host_node); return ret; } @@ -1371,6 +1375,8 @@ static void adv7511_remove(struct i2c_client *i2c) { struct adv7511 *adv7511 = i2c_get_clientdata(i2c); + of_node_put(adv7511->host_node); + adv7511_uninit_regulators(adv7511); drm_bridge_remove(&adv7511->bridge); diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c index 4481489aaf5e..5f195e91b3e6 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7533.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c @@ -181,8 +181,6 @@ int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv) if (!adv->host_node) return -ENODEV; - of_node_put(adv->host_node); - adv->use_timing_gen = !of_property_read_bool(np, "adi,disable-timing-generator");