[PATCH 3/3] drm/amdgpu: add missing size check in amdgpu_debugfs_gprwave_read()

[Alex Deucher]

Avoid a possible buffer overflow if size is larger than 4K.

Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index 2ef7bcfdb2e2..3a118645b4bb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -402,7 +402,7 @@ static ssize_t amdgpu_debugfs_gprwave_read(struct file *f, 
char __user *buf, siz
        int r;
        uint32_t *data, x;
 
-       if (size & 0x3 || *pos & 0x3)
+       if (size > 4096 || size & 0x3 || *pos & 0x3)
                return -EINVAL;
 
        r = pm_runtime_get_sync(adev_to_drm(adev)->dev);
-- 
2.46.2