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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2014-12-23 12:56:49 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2015-01-05 20:10:08 +0300 |
| commit | dd5a74f2f982193620cfa1ef609df1ee805781d4 (patch) | |
| tree | 6ea42eebf713a63abc6f40492b512f54cba42d38 /drivers/gpu | |
| parent | 02ae7af53a451a1b0a51022c4693f5b339133e79 (diff) | |
| download | linux-dd5a74f2f982193620cfa1ef609df1ee805781d4.tar.xz | |
drm/radeon: integer underflow in radeon_cp_dispatch_texture()
The test:
if (size > RADEON_MAX_TEXTURE_SIZE) {
"size" is an integer and it's controled by the user so it can be
negative and the test can underflow. Later we use "size" in:
dwords = size / 4;
...
RADEON_COPY_MT(buffer, data, (int)(dwords * sizeof(u32)));
It causes memory corruption to copy a negative size buffer.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_state.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_state.c b/drivers/gpu/drm/radeon/radeon_state.c index 535403e0c8a2..15aee723db77 100644 --- a/drivers/gpu/drm/radeon/radeon_state.c +++ b/drivers/gpu/drm/radeon/radeon_state.c @@ -1703,7 +1703,7 @@ static int radeon_cp_dispatch_texture(struct drm_device * dev, u32 format; u32 *buffer; const u8 __user *data; - int size, dwords, tex_width, blit_width, spitch; + unsigned int size, dwords, tex_width, blit_width, spitch; u32 height; int i; u32 texpitch, microtile; |