5.4-stable review patch. If anyone has any objections, please let me know.
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From: Ma Ke make24@iscas.ac.cn
commit e794b7b9b92977365c693760a259f8eef940c536 upstream.
As it may return NULL pointer and cause NULL pointer dereference. Add check for the return value of alloc_ordered_workqueue.
Cc: stable@vger.kernel.org Fixes: 2f95bc6d324a ("drm: omapdrm: Perform initialization/cleanup at probe/remove time") Signed-off-by: Ma Ke make24@iscas.ac.cn Signed-off-by: Tomi Valkeinen tomi.valkeinen@ideasonboard.com Link: https://patchwork.freedesktop.org/patch/msgid/20240808061336.2796729-1-make2... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/omapdrm/omap_drv.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/drivers/gpu/drm/omapdrm/omap_drv.c +++ b/drivers/gpu/drm/omapdrm/omap_drv.c @@ -580,6 +580,10 @@ static int omapdrm_init(struct omap_drm_ soc = soc_device_match(omapdrm_soc_devices); priv->omaprev = soc ? (unsigned int)soc->data : 0; priv->wq = alloc_ordered_workqueue("omapdrm", 0); + if (!priv->wq) { + ret = -ENOMEM; + goto err_alloc_workqueue; + }
mutex_init(&priv->list_lock); INIT_LIST_HEAD(&priv->obj_list); @@ -633,6 +637,7 @@ err_cleanup_modeset: err_gem_deinit: omap_gem_deinit(ddev); destroy_workqueue(priv->wq); +err_alloc_workqueue: omap_disconnect_pipelines(ddev); omap_crtc_pre_uninit(priv); drm_dev_put(ddev);