Messages in this thread Patch in this message | | | From | Arvind Yadav <> | Subject | [PATCH] drm: radeon: radeon_ttm: Handle return NULL error from ioremap_nocache | Date | Tue, 24 Jan 2017 14:46:16 +0530 |
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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/radeon/radeon_ttm.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index 0cf03cc..fc129fd 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -502,6 +502,8 @@ static int radeon_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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