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drm/panel/panel-tpo-tpg110: fix a possible null pointer dereference

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[ Upstream commit f22def5970c423ea7f87d5247bd0ef91416b0658 ]

In tpg110_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/20231009090446.4043798-1-make_ruc2021@163.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231009090446.4043798-1-make_ruc2021@163.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ma Ke 2023-10-09 17:04:46 +08:00 committed by Greg Kroah-Hartman
parent c7dc0aca59
commit 9acc2bc001
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/panel/panel-tpo-tpg110.c
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@ -378,6 +378,8 @@ static int tpg110_get_modes(struct drm_panel *panel,
connector->display_info.bus_flags = tpg->panel_mode->bus_flags;
mode = drm_mode_duplicate(connector->dev, &tpg->panel_mode->mode);
if (!mode)
return -ENOMEM;
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;