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Kernel: Return ENOMEM on allocation failures in FramebufferDevice::mmap

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Luke 2021-07-16 01:49:43 +01:00 • committed by Gunnar Beutner
parent 41c0009f6d
commit 2df4d977e2
1 changed files with 11 additions and 0 deletions
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11
Kernel/Graphics/FramebufferDevice.cpp
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@ -43,9 +43,20 @@ KResultOr<Region*> FramebufferDevice::mmap(Process& process, FileDescription&, c
m_userspace_real_framebuffer_vmobject = vmobject;
m_real_framebuffer_vmobject = AnonymousVMObject::try_create_for_physical_range(m_framebuffer_address, page_round_up(framebuffer_size_in_bytes()));
if (!m_real_framebuffer_vmobject)
return ENOMEM;
m_swapped_framebuffer_vmobject = AnonymousVMObject::try_create_with_size(page_round_up(framebuffer_size_in_bytes()), AllocationStrategy::AllocateNow);
if (!m_swapped_framebuffer_vmobject)
return ENOMEM;
m_real_framebuffer_region = MM.allocate_kernel_region_with_vmobject(*m_real_framebuffer_vmobject, page_round_up(framebuffer_size_in_bytes()), "Framebuffer", Region::Access::Read | Region::Access::Write);
if (!m_real_framebuffer_region)
return ENOMEM;
m_swapped_framebuffer_region = MM.allocate_kernel_region_with_vmobject(*m_swapped_framebuffer_vmobject, page_round_up(framebuffer_size_in_bytes()), "Framebuffer Swap (Blank)", Region::Access::Read | Region::Access::Write);
if (!m_swapped_framebuffer_region)
return ENOMEM;
RefPtr<VMObject> chosen_vmobject;
if (m_graphical_writes_enabled) {