Jesse.Zhang 2723e68513 drm/amdgpu: Limit BO list entry count to prevent resource exhaustion ...

[ Upstream commit 6270b1a5da ]

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

Reviewed-by: Christian König <christian.koenig@amd.com>
Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Jesse Zhang <jesse.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 688b87d39e)
Cc: stable@vger.kernel.org
Signed-off-by: Fang Wang <32840572@qq.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-05-07 06:09:25 +02:00

..

drm

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

2026-05-07 06:09:25 +02:00

host1x

gpu: host1x: Fix race in syncpt alloc/free

2025-12-18 13:54:40 +01:00

ipu-v3

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trace

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vga

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Makefile

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