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From b4b46de5417802601c423c7ba7e22ae60e432c88 Mon Sep 17 00:00:00 2001
From: Guchun Chen <guchun.chen@amd.com>
Date: Thu, 8 Aug 2019 14:54:41 +0800
Subject: [PATCH 3351/4256] drm/amdgpu: add check to avoid array bound issue
Sub_block_index can be passed from user level, so
add one check before accessing the array first to
prevent array index out of bound problem.
Change-Id: I556fc560b44215848ba3a95f757febdf3d0af422
Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
---
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 56faabc8fb13..c25002329728 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -5984,6 +5984,9 @@ static int gfx_v9_0_ras_error_inject(struct amdgpu_device *adev,
if (adev->asic_type != CHIP_VEGA20)
return -EINVAL;
+ if (info->head.sub_block_index >= ARRAY_SIZE(ras_gfx_subblocks))
+ return -EINVAL;
+
if (!ras_gfx_subblocks[info->head.sub_block_index].name)
return -EPERM;
--
2.17.1
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