5.15-stable review patch. If anyone has any objections, please let me know.
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From: Ma Ke make24@iscas.ac.cn
commit cb520c3f366c77e8d69e4e2e2781a8ce48d98e79 upstream.
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@... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/gma500/cdv_intel_lvds.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/gma500/cdv_intel_lvds.c +++ b/drivers/gpu/drm/gma500/cdv_intel_lvds.c @@ -310,6 +310,9 @@ static int cdv_intel_lvds_get_modes(stru 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; }