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Groups > linux.kernel > #1565740
| From | Arvind Yadav <arvind.yadav.cs@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] drm/amd/amdgpu/amdgpu_ttm: Handle return NULL error from ioremap_nocache |
| Date | 2017-01-24 10:30 +0100 |
| Message-ID | <t35Al-2uf-1@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
Here, If ioremap_nocache will fail. It will return NULL. Kernel can run into a NULL-pointer dereference. This error check will avoid NULL pointer dereference. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 8e35c1f..610c88f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -552,6 +552,8 @@ static int amdgpu_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_ mem->bus.addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size); + if (!mem->bus.addr) + return -ENOMEM; /* * Alpha: Use just the bus offset plus -- 1.9.1
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[PATCH] drm/amd/amdgpu/amdgpu_ttm: Handle return NULL error from ioremap_nocache Arvind Yadav <arvind.yadav.cs@gmail.com> - 2017-01-24 10:30 +0100
Re: [PATCH] drm/amd/amdgpu/amdgpu_ttm: Handle return NULL error from ioremap_nocache Christian König <deathsimple@vodafone.de> - 2017-01-24 11:00 +0100
Re: [PATCH] drm/amd/amdgpu/amdgpu_ttm: Handle return NULL error from ioremap_nocache Alex Deucher <alexdeucher@gmail.com> - 2017-01-24 23:20 +0100
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