From: Tim Huang Date: Mon, 6 May 2024 08:30:01 +0000 (+0800) Subject: drm/amdgpu: fix mc_data out-of-bounds read warning X-Git-Tag: v6.11-rc1~141^2~25^2~283 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=51dfc0a4d609fe700750a62f41447f01b8c9ea50;p=thirdparty%2Fkernel%2Flinux.git drm/amdgpu: fix mc_data out-of-bounds read warning Clear warning that read mc_data[i-1] may out-of-bounds. Signed-off-by: Tim Huang Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c index 52b12c1718eb0..7dc102f0bc1d3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c @@ -1484,6 +1484,8 @@ int amdgpu_atombios_init_mc_reg_table(struct amdgpu_device *adev, (u32)le32_to_cpu(*((u32 *)reg_data + j)); j++; } else if ((reg_table->mc_reg_address[i].pre_reg_data & LOW_NIBBLE_MASK) == DATA_EQU_PREV) { + if (i == 0) + continue; reg_table->mc_reg_table_entry[num_ranges].mc_data[i] = reg_table->mc_reg_table_entry[num_ranges].mc_data[i - 1]; }