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drm/nouveau: prevent userspace from deleting client object 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2016-05-25 17:11:40 +10:00
parent 96692b097b
commit c966b6279f
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/nouveau/nouveau_usif.c
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@ -313,7 +313,8 @@ usif_ioctl(struct drm_file *filp, void __user *user, u32 argc)
if (!(ret = nvif_unpack(-ENOSYS, &data, &size, argv->v0, 0, 0, true))) {
/* block access to objects not created via this interface */
owner = argv->v0.owner;
if (argv->v0.object == 0ULL)
if (argv->v0.object == 0ULL &&
argv->v0.type != NVIF_IOCTL_V0_DEL)
argv->v0.owner = NVDRM_OBJECT_ANY; /* except client */
else
argv->v0.owner = NVDRM_OBJECT_USIF;