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From ad340cfac93205d30681cf83c9ebf7128767efb1 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 10 Aug 2018 18:50:32 +0800
Subject: [PATCH 5155/5725] drm/amdgpu: fix integer overflow test in
amdgpu_bo_list_create()
We accidentally left out the size of the amdgpu_bo_list struct. It
could lead to memory corruption on 32 bit systems. You'd have to
pick the absolute maximum and set "num_entries == 59652323" then size
would wrap to 16 bytes.
Fixes: 920990cb080a ("drm/amdgpu: allocate the bo_list array after the list")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Bas Nieuwenhuizen <basni@chromium.org>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
index b603249..06fa232 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
@@ -67,7 +67,8 @@ int amdgpu_bo_list_create(struct amdgpu_device *adev, struct drm_file *filp,
unsigned i;
int r;
- if (num_entries > SIZE_MAX / sizeof(struct amdgpu_bo_list_entry))
+ if (num_entries > (SIZE_MAX - sizeof(struct amdgpu_bo_list))
+ / sizeof(struct amdgpu_bo_list_entry))
return -EINVAL;
size = sizeof(struct amdgpu_bo_list);
--
2.7.4
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