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

drm/msm: fix NULL-deref on snapshot tear down

Browse Source 
commit a465353b9250802f87b97123e33a17f51277f0b1 upstream.

In case of early initialisation errors and on platforms that do not use
the DPU controller, the deinitilisation code can be called with the kms
pointer set to NULL.

Fixes: 98659487b845 ("drm/msm: add support to take dpu snapshot")
Cc: stable@vger.kernel.org      # 5.14
Cc: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/525099/
Link: https://lore.kernel.org/r/20230306100722.28485-4-johan+linaro@kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2023-03-06 11:07:15 +01:00 committed by Greg Kroah-Hartman
parent 74543041c0
commit 8f0e1ad532
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/msm/msm_drv.c
View File

@ -359,7 +359,8 @@ static int msm_drm_uninit(struct device *dev)
msm_fbdev_free(ddev);
#endif
msm_disp_snapshot_destroy(ddev);
if (kms)
msm_disp_snapshot_destroy(ddev);
drm_mode_config_cleanup(ddev);