| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 009/120] drm/vc4: Fix a couple error codes in vc4_cl_lookup_bos() | Date | Wed, 18 Jan 2017 11:45:27 +0100 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter <dan.carpenter@oracle.com>
commit b2cdeb19f16ad984eb5bb9193f793d05a8101511 upstream.
If the allocation fails the current code returns success. If copy_from_user() fails it returns the number of bytes remaining instead of -EFAULT.
Fixes: d5b1a78a772f ("drm/vc4: Add support for drawing 3D frames.") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/gpu/drm/vc4/vc4_gem.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)
--- a/drivers/gpu/drm/vc4/vc4_gem.c +++ b/drivers/gpu/drm/vc4/vc4_gem.c @@ -544,14 +544,15 @@ vc4_cl_lookup_bos(struct drm_device *dev handles = drm_malloc_ab(exec->bo_count, sizeof(uint32_t)); if (!handles) { + ret = -ENOMEM; DRM_ERROR("Failed to allocate incoming GEM handles\n"); goto fail; } - ret = copy_from_user(handles, - (void __user *)(uintptr_t)args->bo_handles, - exec->bo_count * sizeof(uint32_t)); - if (ret) { + if (copy_from_user(handles, + (void __user *)(uintptr_t)args->bo_handles, + exec->bo_count * sizeof(uint32_t))) { + ret = -EFAULT; DRM_ERROR("Failed to copy in GEM handles\n"); goto fail; }
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