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| author | Jordan Crouse <jcrouse@codeaurora.org> | 2017-03-07 20:02:51 +0300 |
|---|---|---|
| committer | Rob Clark <robdclark@gmail.com> | 2017-04-03 23:09:35 +0300 |
| commit | 1a5dff5d74e55608a9632a1d030bb79196e0755c (patch) | |
| tree | 3a102ac1358739e9ae7e7b099a2ef5d5dc861f83 /drivers/gpu/drm/msm/msm_gem.c | |
| parent | f456d348b6320a2597a3f1fff3ad0011c5678603 (diff) | |
| download | linux-1a5dff5d74e55608a9632a1d030bb79196e0755c.tar.xz | |
drm/msm: Don't allow zero sized buffer objects
Zero sized buffer objects tend to make various bits of the GEM
infrastructure complain:
WARNING: CPU: 1 PID: 2323 at drivers/gpu/drm/drm_mm.c:389 drm_mm_insert_node_generic+0x258/0x2f0
Modules linked in:
CPU: 1 PID: 2323 Comm: drm-api-test Tainted: G W 4.9.0-rc4-00906-g693af44 #213
Hardware name: Qualcomm Technologies, Inc. DB820c (DT)
task: ffff8000d7353400 task.stack: ffff8000d7720000
PC is at drm_mm_insert_node_generic+0x258/0x2f0
LR is at drm_vma_offset_add+0x4c/0x70
Zero sized buffers serve no appreciable value to the user so disallow
them at create time.
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gem.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c index 59811f29607d..68e509b3b9e4 100644 --- a/drivers/gpu/drm/msm/msm_gem.c +++ b/drivers/gpu/drm/msm/msm_gem.c @@ -812,6 +812,12 @@ struct drm_gem_object *msm_gem_new(struct drm_device *dev, size = PAGE_ALIGN(size); + /* Disallow zero sized objects as they make the underlying + * infrastructure grumpy + */ + if (size == 0) + return ERR_PTR(-EINVAL); + ret = msm_gem_new_impl(dev, size, flags, NULL, &obj); if (ret) goto fail; |