Merge tag 'drm-misc-fixes-2023-04-13' of git://anongit.freedesktop.or…

…g/drm/drm-misc into drm-fixes Short summary of fixes pull: * armada: Fix double free * fb: Clear FB_ACTIVATE_KD_TEXT in ioctl * nouveau: Add missing callbacks * scheduler: Fix use-after-free error Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> From: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20230413184233.GA8148@linux-uq9g
mariux64 · Apr 13, 2023 · cab2932 · cab2932
2 parents fffb0b5 + 5603eff
commit cab2932
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Showing 7 changed files with 15 additions and 3 deletions.
diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c
@@ -99,7 +99,6 @@ static int armada_drm_bind(struct device *dev)
 	if (ret) {
 		dev_err(dev, "[" DRM_NAME ":%s] can't kick out simple-fb: %d\n",
 			__func__, ret);
-		kfree(priv);
 		return ret;
 	}
 

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gf108.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gf108.c
@@ -31,6 +31,7 @@ gf108_fb = {
 	.init = gf100_fb_init,
 	.init_page = gf100_fb_init_page,
 	.intr = gf100_fb_intr,
+	.sysmem.flush_page_init = gf100_fb_sysmem_flush_page_init,
 	.ram_new = gf108_ram_new,
 	.default_bigpage = 17,
 };

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gk104.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gk104.c
@@ -77,6 +77,7 @@ gk104_fb = {
 	.init = gf100_fb_init,
 	.init_page = gf100_fb_init_page,
 	.intr = gf100_fb_intr,
+	.sysmem.flush_page_init = gf100_fb_sysmem_flush_page_init,
 	.ram_new = gk104_ram_new,
 	.default_bigpage = 17,
 	.clkgate_pack = gk104_fb_clkgate_pack,

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gk110.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gk110.c
@@ -59,6 +59,7 @@ gk110_fb = {
 	.init = gf100_fb_init,
 	.init_page = gf100_fb_init_page,
 	.intr = gf100_fb_intr,
+	.sysmem.flush_page_init = gf100_fb_sysmem_flush_page_init,
 	.ram_new = gk104_ram_new,
 	.default_bigpage = 17,
 	.clkgate_pack = gk110_fb_clkgate_pack,

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gm107.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/gm107.c
@@ -31,6 +31,7 @@ gm107_fb = {
 	.init = gf100_fb_init,
 	.init_page = gf100_fb_init_page,
 	.intr = gf100_fb_intr,
+	.sysmem.flush_page_init = gf100_fb_sysmem_flush_page_init,
 	.ram_new = gm107_ram_new,
 	.default_bigpage = 17,
 };

diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -507,12 +507,19 @@ void drm_sched_entity_push_job(struct drm_sched_job *sched_job)
 {
 	struct drm_sched_entity *entity = sched_job->entity;
 	bool first;
+	ktime_t submit_ts;
 
 	trace_drm_sched_job(sched_job, entity);
 	atomic_inc(entity->rq->sched->score);
 	WRITE_ONCE(entity->last_user, current->group_leader);
+
+	/*
+	 * After the sched_job is pushed into the entity queue, it may be
+	 * completed and freed up at any time. We can no longer access it.
+	 * Make sure to set the submit_ts first, to avoid a race.
+	 */
+	sched_job->submit_ts = submit_ts = ktime_get();
 	first = spsc_queue_push(&entity->job_queue, &sched_job->queue_node);
-	sched_job->submit_ts = ktime_get();
 
 	/* first job wakes up scheduler */
 	if (first) {
@@ -529,7 +536,7 @@ void drm_sched_entity_push_job(struct drm_sched_job *sched_job)
 		spin_unlock(&entity->rq_lock);
 
 		if (drm_sched_policy == DRM_SCHED_POLICY_FIFO)
-			drm_sched_rq_update_fifo(entity, sched_job->submit_ts);
+			drm_sched_rq_update_fifo(entity, submit_ts);
 
 		drm_sched_wakeup(entity->rq->sched);
 	}

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
@@ -1116,6 +1116,8 @@ static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
 	case FBIOPUT_VSCREENINFO:
 		if (copy_from_user(&var, argp, sizeof(var)))
 			return -EFAULT;
+		/* only for kernel-internal use */
+		var.activate &= ~FB_ACTIVATE_KD_TEXT;
 		console_lock();
 		lock_fb_info(info);
 		ret = fbcon_modechange_possible(info, &var);