From 5a642e6bc49f59922e19ebd639e74f72753fc77b Mon Sep 17 00:00:00 2001 From: Lucas Stach Date: Fri, 8 Sep 2017 16:24:32 +0200 Subject: etnaviv: fix submit error path If the gpu submit fails, bail out to avoid accessing a potentially unititalized fence. CC: stable@vger.kernel.org #4.12+ Signed-off-by: Lucas Stach --- drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c index 6463fc2c736f..b95362186f9c 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c @@ -445,8 +445,10 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data, cmdbuf->user_size = ALIGN(args->stream_size, 8); ret = etnaviv_gpu_submit(gpu, submit, cmdbuf); - if (ret == 0) - cmdbuf = NULL; + if (ret) + goto out; + + cmdbuf = NULL; if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) { /* -- cgit v1.2.3-70-g09d2 From 518417525f3652c12fb5fad6da4ade66c0072fa3 Mon Sep 17 00:00:00 2001 From: Lucas Stach Date: Mon, 11 Sep 2017 15:29:31 +0200 Subject: etnaviv: fix gem object list corruption All manipulations of the gem_object list need to be protected by the list mutex, as GEM objects can be created and freed in parallel. This fixes a kernel memory corruption. CC: stable@vger.kernel.org Signed-off-by: Lucas Stach --- drivers/gpu/drm/etnaviv/etnaviv_gem.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers') diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c b/drivers/gpu/drm/etnaviv/etnaviv_gem.c index 9a3bea738330..87b95eeedd9e 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c @@ -551,12 +551,15 @@ static const struct etnaviv_gem_ops etnaviv_gem_shmem_ops = { void etnaviv_gem_free_object(struct drm_gem_object *obj) { struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj); + struct etnaviv_drm_private *priv = obj->dev->dev_private; struct etnaviv_vram_mapping *mapping, *tmp; /* object should not be active */ WARN_ON(is_active(etnaviv_obj)); + mutex_lock(&priv->gem_lock); list_del(&etnaviv_obj->gem_node); + mutex_unlock(&priv->gem_lock); list_for_each_entry_safe(mapping, tmp, &etnaviv_obj->vram_list, obj_node) { -- cgit v1.2.3-70-g09d2