diff options
| author | Ma Ke <make24@iscas.ac.cn> | 2024-07-09 19:33:11 +0800 |
|---|---|---|
| committer | Patrik Jakobsson <patrik.r.jakobsson@gmail.com> | 2024-07-09 20:02:14 +0200 |
| commit | cb520c3f366c77e8d69e4e2e2781a8ce48d98e79 (patch) | |
| tree | 523eb15aff39549c90fa9f0df23a28b08352122e | |
| parent | 2df7aac81070987b0f052985856aa325a38debf6 (diff) | |
drm/gma500: fix null pointer dereference in cdv_intel_lvds_get_modesdrm-misc-fixes-2024-07-11
In cdv_intel_lvds_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.
Cc: stable@vger.kernel.org
Fixes: 6a227d5fd6c4 ("gma500: Add support for Cedarview")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240709113311.37168-1-make24@iscas.ac.cn
| -rw-r--r-- | drivers/gpu/drm/gma500/cdv_intel_lvds.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/cdv_intel_lvds.c b/drivers/gpu/drm/gma500/cdv_intel_lvds.c index f08a6803dc18..3adc2c9ab72d 100644 --- a/drivers/gpu/drm/gma500/cdv_intel_lvds.c +++ b/drivers/gpu/drm/gma500/cdv_intel_lvds.c @@ -311,6 +311,9 @@ static int cdv_intel_lvds_get_modes(struct drm_connector *connector) if (mode_dev->panel_fixed_mode != NULL) { struct drm_display_mode *mode = drm_mode_duplicate(dev, mode_dev->panel_fixed_mode); + if (!mode) + return 0; + drm_mode_probed_add(connector, mode); return 1; } |