NULL Pointer Dereference in Linux Kernel Rockchip RGA Driver

Compliance Impact

The provided information does not include any details about the impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

Useful 0 Not Useful 0

Executive Summary

This vulnerability exists in the Linux kernel's media component for Rockchip's RGA (Raster Graphic Accelerator). Specifically, the function rga_get_frame() can return an error pointer ERR_PTR(-EINVAL) when the buffer type is unsupported or invalid. However, the function rga_buf_init() does not check this error return value and proceeds to dereference the pointer unconditionally when accessing the size field. This can lead to dereferencing an invalid pointer.

The fix involves adding proper error pointer checking in rga_buf_init() and returning the error instead of dereferencing the invalid pointer.

Useful 0 Not Useful 0

Impact Analysis

Dereferencing an invalid pointer can cause the Linux kernel to crash or behave unpredictably, potentially leading to system instability or denial of service. This could affect any system using the Rockchip RGA media component if it processes unsupported or invalid buffer types.

Useful 0 Not Useful 0

Mitigation Strategies

To mitigate this vulnerability, ensure that your Linux kernel is updated to a version where the fix for the ERR_PTR dereference in rga_buf_init() has been applied.

The fix involves proper checking of the ERR_PTR return value from rga_get_frame() to prevent dereferencing invalid pointers.

Therefore, applying the latest kernel patches or updates from your Linux distribution that address this issue is the immediate recommended step.

Useful 0 Not Useful 0