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Fix bad error in calculating the leak check info address when updating the

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size of a reallocated block. If you had kernel heap leak checking on, this
could have caused the first four bytes of the next block to be overwritten
with the size of the reallocation of the previous block.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24011 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Michael Lotz 2008-02-19 00:42:54 +00:00
parent d4d25a55bd
commit b024c395d7
1 changed files with 2 additions and 1 deletions
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3
src/system/kernel/heap.cpp
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@ -931,7 +931,8 @@ heap_realloc(heap_allocator *heap, void *address, void **newAddress,
if (newSize > minSize && newSize <= maxSize) {
#if KERNEL_HEAP_LEAK_CHECK
// update the size info (the info is at the end so stays where it is)
heap_leak_check_info *info = (heap_leak_check_info *)((addr_t)address + maxSize);
heap_leak_check_info *info = (heap_leak_check_info *)((addr_t)address
+ maxSize - sizeof(heap_leak_check_info));
info->size = newSize - sizeof(heap_leak_check_info);
newSize -= sizeof(heap_leak_check_info);
#endif