CVE-2024-56695: drm/amdkfd: Use dynamic allocation for CU occupancy array in 'kfd_get_cu_occupancy()'
First published: Sat Dec 28 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Use dynamic allocation for CU occupancy array in 'kfd_get_cu_occupancy()' The `kfd_get_cu_occupancy` function previously declared a large `cu_occupancy` array as a local variable, which could lead to stack overflows due to excessive stack usage. This commit replaces the static array allocation with dynamic memory allocation using `kcalloc`, thereby reducing the stack size. This change avoids the risk of stack overflows in kernel space, in scenarios where `AMDGPU_MAX_QUEUES` is large. The allocated memory is freed using `kfree` before the function returns to prevent memory leaks. Fixes the below with gcc W=1: drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.c: In function ‘kfd_get_cu_occupancy’: drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.c:322:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=] 322 | } | ^
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Red Hat Kernel-devel | ||
| Linux Kernel | >=6.12<6.12.2 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-56695?
CVE-2024-56695 is classified as a medium severity vulnerability.
How do I fix CVE-2024-56695?
To fix CVE-2024-56695, it is recommended to update the Linux kernel to the latest patched version.
What systems are affected by CVE-2024-56695?
CVE-2024-56695 affects various versions of the Linux kernel using the drm/amdkfd subsystem.
What are the implications of CVE-2024-56695?
CVE-2024-56695 could lead to potential memory issues due to improper local variable allocation, impacting system stability.
When was CVE-2024-56695 first reported?
CVE-2024-56695 was first reported on October 10, 2024.
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