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Kernel: Propagate overflow errors from Memory::page_round_up
Fixes #11402.
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parent
11599a3342
commit
33b78915d3
31 changed files with 112 additions and 100 deletions
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@ -59,7 +59,17 @@ UNMAP_AFTER_INIT bool Access::search_pci_domains_from_acpi_mcfg_table(PhysicalAd
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dbgln("PCI: MCFG, length: {}, revision: {}", length, revision);
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auto mcfg_region_or_error = MM.allocate_kernel_region(mcfg_table.page_base(), Memory::page_round_up(length) + PAGE_SIZE, "PCI Parsing MCFG", Memory::Region::Access::ReadWrite);
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if (Checked<size_t>::addition_would_overflow(length, PAGE_SIZE)) {
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dbgln("Overflow when adding extra page to allocation of length {}", length);
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return false;
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}
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length += PAGE_SIZE;
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auto region_size_or_error = Memory::page_round_up(length);
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if (region_size_or_error.is_error()) {
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dbgln("Failed to round up length of {} to pages", length);
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return false;
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}
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auto mcfg_region_or_error = MM.allocate_kernel_region(mcfg_table.page_base(), region_size_or_error.value(), "PCI Parsing MCFG", Memory::Region::Access::ReadWrite);
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if (mcfg_region_or_error.is_error())
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return false;
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auto& mcfg = *(ACPI::Structures::MCFG*)mcfg_region_or_error.value()->vaddr().offset(mcfg_table.offset_in_page()).as_ptr();
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