From nobody Fri Dec 19 06:59:55 2025 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 D03A81E5847; Sun, 24 Mar 2024 22:53:44 +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=1711320825; cv=none; b=PoKOBuqHkWttQ8Pzn6IghYg4gBiiw5YaH0S3ikLPyyKKXlvEJmD3x8HQt7mFJjYUL+vmjelE38DaB8RVChZdM07etVGe8hLoZLH70JlwgIDrftne4/P3fG4225G63ucysKhqBi0eBIk6omtzDBtCVEzwJjeeTPxNnvZ9ghkNceQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711320825; c=relaxed/simple; bh=1wD1lMemO0UeL75hTPilrXieqNAbYo6cSZgOGib9LQ8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fvOoxBBa1BNnZmr2ypYj5VNjyvutjuYO1IpajSMzTv5RvyH3lkpEPpJ7ES4BK6QpDcYpKS3mq1JGvsus06rYxzSaDaMMLP4OhsOsCXf/+hwPSgpkCJt31TBkYK260Ihk94HPOob3DRG2dLCy1baNooEfLycdDl3EPw6Pl8pQp1g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DJLimDeN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DJLimDeN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 18B37C433C7; Sun, 24 Mar 2024 22:53:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711320824; bh=1wD1lMemO0UeL75hTPilrXieqNAbYo6cSZgOGib9LQ8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DJLimDeNHo/puLfJqD4/MPw/2Mna2wR134bWeF8YQgBbF6MmPjX9YESU7ER3hQ/s+ 4ScuI79CZxMLs1jit+C3JW2OUSMTlzkjdxrTxMb7aCrpbt2eAFwXn6n2AiPjXKENDZ y9ppXPVXreYwkdIql3DvsqbXiMzY6J6dcZmfGvGizO9vDX6cpaEUXISEhpsscReCcw BrAlCc5qsFAXqJtOKsbfPxKnvXji1F1EUXLYM8jfjhZcP6Mkdw+1WVDSf9yMlhSEgO 8MuxkmixS/Ov+MEw1rwM2zEm1nyzJbwXJNqmqcb3wMHBuuEGuXVMl960EL1idS++DE Kw1gPLnRQTLYg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Chen Ni , Thierry Reding , Sasha Levin Subject: [PATCH 6.7 389/713] drm/tegra: dsi: Add missing check for of_find_device_by_node Date: Sun, 24 Mar 2024 18:41:55 -0400 Message-ID: <20240324224720.1345309-390-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240324224720.1345309-1-sashal@kernel.org> References: <20240324224720.1345309-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Chen Ni [ Upstream commit afe6fcb9775882230cd29b529203eabd5d2a638d ] Add check for the return value of of_find_device_by_node() and return the error if it fails in order to avoid NULL pointer dereference. Fixes: e94236cde4d5 ("drm/tegra: dsi: Add ganged mode support") Signed-off-by: Chen Ni Signed-off-by: Thierry Reding Link: https://patchwork.freedesktop.org/patch/msgid/20231024080738.825553-1= -nichen@iscas.ac.cn Signed-off-by: Sasha Levin --- drivers/gpu/drm/tegra/dsi.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index fbfe92a816d4b..e419b76e57d3e 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -1544,9 +1544,11 @@ static int tegra_dsi_ganged_probe(struct tegra_dsi *= dsi) np =3D of_parse_phandle(dsi->dev->of_node, "nvidia,ganged-mode", 0); if (np) { struct platform_device *gangster =3D of_find_device_by_node(np); + of_node_put(np); + if (!gangster) + return -EPROBE_DEFER; =20 dsi->slave =3D platform_get_drvdata(gangster); - of_node_put(np); =20 if (!dsi->slave) { put_device(&gangster->dev); --=20 2.43.0