iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/gma500: fix null pointer dereference in psb_intel_lvds_get_modes

Browse Source 
commit 2df7aac81070987b0f052985856aa325a38debf6 upstream.

In psb_intel_lvds_get_modes(), the return value of drm_mode_duplicate() is
assigned to mode, which will lead to a possible NULL pointer dereference
on failure of drm_mode_duplicate(). Add a check to avoid npd.

Cc: stable@vger.kernel.org
Fixes: 89c78134cc54 ("gma500: Add Poulsbo support")
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/20240709092011.3204970-1-make24@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ma Ke 2024-07-09 17:20:11 +08:00 committed by Greg Kroah-Hartman
parent 977ee4fe89
commit 475a5b3b7c
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/gma500/psb_intel_lvds.c
View File

@ -504,6 +504,9 @@ static int psb_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;
}