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Kernel: Handle OOM when adding memory regions to Spaces :^)

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This commit is contained in:
Idan Horowitz 2021-07-15 01:18:00 +03:00 • committed by Andreas Kling
parent e94dfb7355
commit be475cd6a8
3 changed files with 30 additions and 18 deletions
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9
Kernel/Syscalls/fork.cpp
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@ -102,8 +102,13 @@ KResultOr<FlatPtr> Process::sys$fork(RegisterState& regs)
return ENOMEM;
}
auto& child_region = child->space().add_region(region_clone.release_nonnull());
child_region.map(child->space().page_directory(), ShouldFlushTLB::No);
auto* child_region = child->space().add_region(region_clone.release_nonnull());
if (!child_region) {
dbgln("fork: Cannot add region, insufficient memory");
// TODO: tear down new process?
return ENOMEM;
}
child_region->map(child->space().page_directory(), ShouldFlushTLB::No);
if (region == m_master_tls_region.unsafe_ptr())
child->m_master_tls_region = child_region;