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Change History

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: Limit BO list entry count to prevent resource exhaustion

Userspace can pass an arbitrary number of BO list entries via the
bo_number field. Although the previous multiplication overflow check
prevents out-of-bounds allocation, a large number of entries could still
cause excessive memory allocation (up to potentially gigabytes) and
unnecessarily long list processing times.

Introduce a hard limit of 128k entries per BO list, which is more than
sufficient for any realistic use case (e.g., a single list containing all
buffers in a large scene). This prevents memory exhaustion attacks and
ensures predictable performance.

Return -EINVAL if the requested entry count exceeds the limit

(cherry picked from commit 688b87d39e0aa8135105b40dc167d74b5ada5332)

https://git.kernel.org/stable/c/5ce4a38e6c2488949e373d5066303f9c128db614

https://git.kernel.org/stable/c/6270b1a5dab94665d7adce3dc78bc9066ed28bdd

https://git.kernel.org/stable/c/f462624a6e4b5f1ec2664c2c53e408b2f4fb53e9