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fix possible underflow in memory manager

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This commit is contained in:
Georg Reinke 2017-03-28 12:52:21 +02:00
parent dd738a6462
commit 1fd368d360
1 changed files with 3 additions and 0 deletions
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3
lib/memory.c
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@ -120,6 +120,9 @@ void* memory_managed_alloc(struct memtype *m, size_t len, size_t alignment)
uintptr_t gap = 0;
if (rem != 0) {
gap = alignment - rem;
if (gap > avail)
// next aligned address isn't in this block anymore
continue;
cptr += gap;
avail -= gap;
}