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score: Improve heap protection

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Check block pointers of deferred free list before use.
This commit is contained in:
Alexander Krutwig
2016-06-14 09:26:12 +02:00
committed by Sebastian Huber
parent 9bfad8cd51
commit 006af6ac76
1 changed files with 7 additions and 2 deletions
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9
cpukit/score/src/heapallocate.c
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@@ -43,9 +43,14 @@
uintptr_t count = 0; uintptr_t count = 0;
for ( count = 0; count < blocks_to_free_count; ++count ) { for ( count = 0; count < blocks_to_free_count; ++count ) {
Heap_Block *next_block_to_free = Heap_Block *next_block_to_free;
block_to_free->Protection_begin.next_delayed_free_block;
if ( !_Heap_Is_block_in_heap( heap, block_to_free ) ) {
_Heap_Protection_block_error( heap, block_to_free );
}
next_block_to_free =
block_to_free->Protection_begin.next_delayed_free_block;
block_to_free->Protection_begin.next_delayed_free_block = block_to_free->Protection_begin.next_delayed_free_block =
HEAP_PROTECTION_OBOLUS; HEAP_PROTECTION_OBOLUS;