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Fix munmap(2) splitting segments instead of deleting from the right.

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An erroneous split could create an invalid zero size segment.
This commit is contained in:
Jonas 'Sortie' Termansen 2024-09-27 17:45:32 +02:00
parent 15bf43249a
commit 7d16956808
1 changed files with 2 additions and 2 deletions

4
kernel/memorymanagement.cpp
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@ -133,8 +133,8 @@ void UnmapMemory(Process* process, uintptr_t addr, size_t size)
continue;
}
// Delete the middle of the segment if covered there by our request.
if ( conflict->addr < addr && addr + size - conflict->addr <= conflict->size )
// Delete the middle of the segment if our request splits it in two.
if ( conflict->addr < addr && addr + size < conflict->size + conflict->addr )
{
Memory::UnmapRange(addr, size, PAGE_USAGE_USER_SPACE);
Memory::Flush();