From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Ma Ke <make_ruc2021@163.com>,
Neil Armstrong <neil.armstrong@linaro.org>,
Sasha Levin <sashal@kernel.org>,
linus.walleij@linaro.org, maarten.lankhorst@linux.intel.com,
mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com,
daniel@ffwll.ch, dri-devel@lists.freedesktop.org
Subject: [PATCH AUTOSEL 5.10 07/11] drm/panel: fix a possible null pointer dereference
Date: Tue, 7 Nov 2023 07:30:40 -0500 [thread overview]
Message-ID: <20231107123100.3762796-7-sashal@kernel.org> (raw)
In-Reply-To: <20231107123100.3762796-1-sashal@kernel.org>
From: Ma Ke <make_ruc2021@163.com>
[ Upstream commit 924e5814d1f84e6fa5cb19c6eceb69f066225229 ]
In versatile_panel_get_modes(), the return value of drm_mode_duplicate()
is assigned to mode, which will lead to a NULL pointer dereference
on failure of drm_mode_duplicate(). Add a check to avoid npd.
Signed-off-by: Ma Ke <make_ruc2021@163.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20231007033105.3997998-1-make_ruc2021@163.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231007033105.3997998-1-make_ruc2021@163.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/panel/panel-arm-versatile.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-arm-versatile.c b/drivers/gpu/drm/panel/panel-arm-versatile.c
index abb0788843c60..503ecea72c5ea 100644
--- a/drivers/gpu/drm/panel/panel-arm-versatile.c
+++ b/drivers/gpu/drm/panel/panel-arm-versatile.c
@@ -267,6 +267,8 @@ static int versatile_panel_get_modes(struct drm_panel *panel,
connector->display_info.bus_flags = vpanel->panel_type->bus_flags;
mode = drm_mode_duplicate(connector->dev, &vpanel->panel_type->mode);
+ if (!mode)
+ return -ENOMEM;
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
--
2.42.0
next prev parent reply other threads:[~2023-11-07 13:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-07 12:30 [PATCH AUTOSEL 5.10 01/11] drm/komeda: drop all currently held locks if deadlock happens Sasha Levin
2023-11-07 12:30 ` [PATCH AUTOSEL 5.10 02/11] drm/msm/dp: skip validity check for DP CTS EDID checksum Sasha Levin
2023-11-07 12:30 ` [PATCH AUTOSEL 5.10 03/11] drm/amd: Fix UBSAN array-index-out-of-bounds for SMU7 Sasha Levin
2023-11-07 12:30 ` [PATCH AUTOSEL 5.10 04/11] drm/radeon: Fix UBSAN array-index-out-of-bounds for Radeon HD 5430 Sasha Levin
2023-11-07 12:30 ` [PATCH AUTOSEL 5.10 05/11] drm/amd: Fix UBSAN array-index-out-of-bounds for Polaris and Tonga Sasha Levin
2023-11-07 12:30 ` [PATCH AUTOSEL 5.10 06/11] drm/amdgpu: Fix potential null pointer derefernce Sasha Levin
2023-11-07 12:30 ` Sasha Levin [this message]
2023-11-07 12:30 ` [PATCH AUTOSEL 5.10 08/11] drm/panel/panel-tpo-tpg110: fix a possible null pointer dereference Sasha Levin
2023-11-07 12:30 ` [PATCH AUTOSEL 5.10 09/11] drm/panel: st7703: Pick different reset sequence Sasha Levin
2023-11-07 12:30 ` [PATCH AUTOSEL 5.10 10/11] drm/amdgpu: Fix a null pointer access when the smc_rreg pointer is NULL Sasha Levin
2023-11-07 12:30 ` [PATCH AUTOSEL 5.10 11/11] selftests/efivarfs: create-read: fix a resource leak Sasha Levin
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