#31 - Prevent overflow if not enough space

Matt-DESTROYER · Matt-DESTROYER · commit c6c5364cca4e · 2026-02-11T02:31:10.000+11:00
diff --git a/kernel/src/drivers/allocator.c b/kernel/src/drivers/allocator.c
@@ -91,6 +91,7 @@ static void _defragment_block(MemoryHeader_t* header) {
 }
 
 static void _fragment_block(MemoryHeader_t* header, uintptr_t size) {
+	if (size > header->size) return;
 	uintptr_t remaining_space = header->size - size;
 	// if there isn't enough space for anything really
 	if (remaining_space < sizeof(MemoryHeader_t) + MINIMUM_BLOCK_SIZE) {

Original file line number	Diff line number	Diff line change
`@@ -91,6 +91,7 @@ static void _defragment_block(MemoryHeader_t* header) {`
`91`	`91`	`}`
`92`	`92`
`93`	`93`	`static void _fragment_block(MemoryHeader_t* header, uintptr_t size) {`
	`94`	`+ if (size > header->size) return;`
`94`	`95`	`uintptr_t remaining_space = header->size - size;`
`95`	`96`	`// if there isn't enough space for anything really`
`96`	`97`	`if (remaining_space < sizeof(MemoryHeader_t) + MINIMUM_BLOCK_SIZE) {`