drm_mode_duplicate() could return NULL due to lack of memory,
which will then call NULL pointer dereference. Add a check to
prevent it.
Fixes: 6ee738610f41 ("drm/nouveau: Add DRM driver for NVIDIA GPUs")
Signed-off-by: Zhang Zekun <zhangzekun11@xxxxxxxxxx>
---
drivers/gpu/drm/i2c/ch7006_drv.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i2c/ch7006_drv.c b/drivers/gpu/drm/i2c/ch7006_drv.c
index 131512a5f3bd..a2942f497c60 100644
--- a/drivers/gpu/drm/i2c/ch7006_drv.c
+++ b/drivers/gpu/drm/i2c/ch7006_drv.c
@@ -232,12 +232,16 @@ static int ch7006_encoder_get_modes(struct drm_encoder *encoder,
int n = 0;
for (mode = ch7006_modes; mode->mode.clock; mode++) {
+ struct drm_display_mode *new_mode;
+
if (~mode->valid_scales & 1<<priv->scale ||
~mode->valid_norms & 1<<priv->norm)
continue;
- drm_mode_probed_add(connector,
- drm_mode_duplicate(encoder->dev, &mode->mode));
+ new_mode = drm_mode_duplicate(encoder->dev, &mode->mode);
+ if (!new_mode)
+ continue;
+ drm_mode_probed_add(connector, new_mode);
n++;
}
--
2.17.1
