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Kernel: Fix race condition in FileBackedRegion creation

This commit is contained in:
Bananymous 2025-05-30 22:03:03 +03:00
parent 692ba43182
commit 60d1c26114
1 changed files with 1 additions and 3 deletions
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4
kernel/kernel/Memory/FileBackedRegion.cpp
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@ -27,9 +27,7 @@ namespace Kernel
TRY(region->m_dirty_pages.resize(BAN::Math::div_round_up<size_t>(size, PAGE_SIZE))); TRY(region->m_dirty_pages.resize(BAN::Math::div_round_up<size_t>(size, PAGE_SIZE)));
LockGuard _(inode->m_mutex); LockGuard _(inode->m_mutex);
if (inode->m_shared_region.valid()) if (!(region->m_shared_data = inode->m_shared_region.lock()))
region->m_shared_data = inode->m_shared_region.lock();
else
{ {
auto shared_data = TRY(BAN::RefPtr<SharedFileData>::create()); auto shared_data = TRY(BAN::RefPtr<SharedFileData>::create());
TRY(shared_data->pages.resize(BAN::Math::div_round_up<size_t>(inode->size(), PAGE_SIZE))); TRY(shared_data->pages.resize(BAN::Math::div_round_up<size_t>(inode->size(), PAGE_SIZE)));