diff options
| author | Matthew Auld <matthew.auld@intel.com> | 2018-05-02 20:50:21 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2018-05-08 12:24:39 +0100 |
| commit | c11c7bfd213495784b22ef82a69b6489f8d0092f (patch) | |
| tree | 4da8be6f3997f7a8d2db60050136bfcdcfb77527 /drivers/gpu | |
| parent | a02eb975be78171f66a47c103e57e7940d0860a7 (diff) | |
| download | op-kernel-dev-c11c7bfd213495784b22ef82a69b6489f8d0092f.zip op-kernel-dev-c11c7bfd213495784b22ef82a69b6489f8d0092f.tar.gz | |
drm/i915/userptr: reject zero user_size
Operating on a zero sized GEM userptr object will lead to explosions.
Fixes: 5cc9ed4b9a7a ("drm/i915: Introduce mapping of user pages into video memory (userptr) ioctl")
Testcase: igt/gem_userptr_blits/input-checking
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180502195021.30900-1-matthew.auld@intel.com
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_userptr.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_userptr.c b/drivers/gpu/drm/i915/i915_gem_userptr.c index d596a83..854bd51 100644 --- a/drivers/gpu/drm/i915/i915_gem_userptr.c +++ b/drivers/gpu/drm/i915/i915_gem_userptr.c @@ -778,6 +778,9 @@ i915_gem_userptr_ioctl(struct drm_device *dev, I915_USERPTR_UNSYNCHRONIZED)) return -EINVAL; + if (!args->user_size) + return -EINVAL; + if (offset_in_page(args->user_ptr | args->user_size)) return -EINVAL; |
