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authordavidxu <davidxu@FreeBSD.org>2014-02-27 02:36:09 +0000
committerdavidxu <davidxu@FreeBSD.org>2014-02-27 02:36:09 +0000
commit3c6681dc2c610038f536ad483a501e35a1a7312c (patch)
tree27c811097b1e1ebd1b76dac8f1a7de7be6e7aa26 /etc
parent7f44971ec587a3cd596e85ca429d5242a154cb46 (diff)
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MFC r262277:
malloc_aligned() may not leave enough space for pointer to allocated memory, saving the pointer will overwrite bytes belongs to another memory block unexpectly, to fix the problem, use (allocated address + sizeof(void *)) as initial value, and slip to next aligned address, so maximum extra bytes is sizeof(void *) + align - 1. Tested by: Andre Albsmeier < mail at ma17 dot ata dot myota dot orgndre > MFC r262334: Increase alignment to size of pointer if the alignment is too small. Some modules do not align data at least to size of pointer, they uses a smaller alignment, but our pointer should be aligned to its native boundary, otherwise on some platforms, hardware alignment checking will cause bus error.
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