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2013 May 13
8
[Bug 2101] New: Unaligned memory access on sparc in UMAC implemetation
...?id=2264&action=edit Bug fix based on Solaris Studio #pragma There is an alignment issue in UMAC implementation, which can cause crash in ssh binary on sparc. Static variable m is defined in mac.c as an array of chars: 168 static u_char m[EVP_MAX_MD_SIZE]; This array is passed to function umac128_final() in ssh/umac.c, and later cast to 64-bit unsigned integer and accessed in pdf_gen_xor(): 264 *((UINT64 *)buf) ^= ((UINT64 *)pc->cache)[ndx]; AFAIK, there is no assurance, that a static char array will be double-word aligned. And indeed, when compiled using Solaris Studio 12.1 cc, the vari...