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Kernel: Don't treat read faults like CoW exceptions

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I'm not sure why we would have a non-readable CoW region, but I suppose
we could, so let's not Copy-on-Read in those cases.
This commit is contained in:
Andreas Kling 2019-08-06 09:39:39 +02:00
parent af4cf01560
commit 945f8eb22a
2 changed files with 9 additions and 3 deletions
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2
Kernel/VM/MemoryManager.cpp
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@ -437,7 +437,7 @@ PageFaultResponse MemoryManager::handle_page_fault(const PageFault& fault)
return PageFaultResponse::Continue;
}
ASSERT(fault.type() == PageFault::Type::ProtectionViolation);
if (region->should_cow(page_index_in_region)) {
if (fault.access() == PageFault::Access::Write && region->should_cow(page_index_in_region)) {
#ifdef PAGE_FAULT_DEBUG
dbgprintf("PV(cow) fault in Region{%p}[%u]\n", region, page_index_in_region);
#endif