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evdi_gem: Fix null pointer deference #1

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Feb 2, 2021
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evdi_gem: Fix null pointer deference #1

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6 changes: 5 additions & 1 deletion module/evdi_gem.c
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Original file line number Diff line number Diff line change
Expand Up @@ -211,14 +211,18 @@ static void evdi_gem_put_pages(struct evdi_gem_object *obj)

int evdi_gem_vmap(struct evdi_gem_object *obj)
{
#if KERNEL_VERSION(5, 11, 0) <= LINUX_VERSION_CODE
struct dma_buf_map map;
#endif
int page_count = obj->base.size / PAGE_SIZE;
int ret;

if (obj->base.import_attach) {
#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 11, 0)
obj->vmapping = dma_buf_vmap(obj->base.import_attach->dmabuf);
#else
dma_buf_vmap(obj->base.import_attach->dmabuf, obj->vmapping);
dma_buf_vmap(obj->base.import_attach->dmabuf, &map);
obj->vmapping = map.vaddr;
#endif
if (!obj->vmapping)
return -ENOMEM;
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