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drm/amdgpu: check PS, WS index

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Theoretically, it would be possible for a buggy or malicious VBIOS to
overwrite past the bounds of the passed parameters (or its own
workspace); add bounds checking to prevent this from happening.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3093
Signed-off-by: Alexander Richards <electrodeyt@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alexander Richards
2024-01-11 16:04:48 +01:00
committed by Alex Deucher
parent a25dea474a
commit 4630d5031c
14 changed files with 102 additions and 74 deletions
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2
drivers/gpu/drm/amd/display/dc/bios/command_table.c
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@@ -37,7 +37,7 @@
#define EXEC_BIOS_CMD_TABLE(command, params)\
(amdgpu_atom_execute_table(((struct amdgpu_device *)bp->base.ctx->driver_context)->mode_info.atom_context, \
GetIndexIntoMasterTable(COMMAND, command), \
(uint32_t *)&params) == 0)
(uint32_t *)&params, sizeof(params)) == 0)
#define BIOS_CMD_TABLE_REVISION(command, frev, crev)\
amdgpu_atom_parse_cmd_header(((struct amdgpu_device *)bp->base.ctx->driver_context)->mode_info.atom_context, \