Date: Fri, 12 Aug 2011 15:05:04 +0400 From: Vasiliy Kulikov <segoon@...nwall.com> To: kernel-hardening@...ts.openwall.com Subject: Re: [RFC] x86, mm: start mmap allocation for libs from low addresses On Fri, Aug 12, 2011 at 14:58 +0400, Solar Designer wrote: > On Fri, Aug 12, 2011 at 02:29:54PM +0400, Vasiliy Kulikov wrote: > > As a > > result, it makes it impossible to change the return address on the stack > > to the address of some library function (e.g. system(3)). > > JFYI, this statement is too strong. [...] You're right. I was thinking about a single overflow for ret2lib with 1+ argument(s). In general, my statement is wrong, sure. Thank you! -- Vasiliy
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