Messages in this thread | | | Date | Fri, 23 Jun 2017 16:54:41 +0200 | From | Oleg Nesterov <> | Subject | Re: [tip:x86/mm] x86/mmap, ASLR: Do not treat unlimited-stack tasks as legacy mmap |
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On 06/23, tip-bot for Michal Hocko wrote: > > We added a heuristics to treat applications with RLIMIT_STACK configured > to unlimited as legacy. This means:
To me this also means a minor security problem. The comment above PER_CLEAR_ON_SETID says "must be cleared upon setuid or setgid exec", but if you do "ulimit -s unlimited" before suid exec then ADDR_COMPAT_LAYOUT set by security checks will be ignored.
> So let's try and remove this assumption - hopefully nothing breaks.
Agreed.
Oleg.
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