drm/amdgpu/psp: prevent page fault by checking write_frame address(v4)

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- Prevent a possible buffer overflow when updating the ring buffer by
    bounds checking the command frame against the available space in the
    ring buffer.

 v2: update the ring_buffer_end address
 v3: update the commit log
 v4: squash in print fix (Michel)

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Evan Quan 2017-10-16 16:51:28 +08:00 • committed by Alex Deucher

parent 0722382dcc

commit 4694257e7d

2 changed files with 24 additions and 4 deletions

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14

drivers/gpu/drm/amd/amdgpu/psp_v10_0.c

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14

drivers/gpu/drm/amd/amdgpu/psp_v3_1.c

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