Re: [PATCH 2/4] x86: SROP mitigation: implement signal canaries

From: Andi Kleen
Date: Fri May 16 2014 - 12:03:09 EST


> Hrmz.. FP state is aligned on a 64 byte boundary, the signal frame (separately)
> on a 16 byte-sizeof(long) boundary. But it looks like that for 32 and 64 bit
> rt_sigreturn this means no padding :-/

There may be some unused bytes in the existing structures, perhaps not
continuous.

-Andi
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