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Kernel: More gracefully handle out-of-memory when creating PageDirectory

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Tom 2020-09-27 08:10:10 -06:00 • committed by Andreas Kling
parent ae956edf6e
commit bf9be3ec01
3 changed files with 23 additions and 5 deletions
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6
Kernel/Syscalls/execve.cpp
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@ -284,11 +284,15 @@ KResultOr<Process::LoadResult> Process::load(NonnullRefPtr<FileDescription> main
NonnullOwnPtrVector<Region> old_regions;
{
auto page_directory = PageDirectory::create_for_userspace(*this);
if (!page_directory)
return KResult(-ENOMEM);
// Need to make sure we don't swap contexts in the middle
ScopedCritical critical;
old_page_directory = move(m_page_directory);
old_regions = move(m_regions);
m_page_directory = PageDirectory::create_for_userspace(*this);
m_page_directory = page_directory.release_nonnull();
}
ArmedScopeGuard rollback_regions_guard([&]() {