Messages in this thread |  | | Date | Wed, 24 Jan 2018 20:46:22 +0000 | From | Alan Cox <> | Subject | Re: Avoiding information leaks between users and between processes by default? [Was: : [PATCH 1/5] prctl: add PR_ISOLATE_BP process control] |
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> Anyway, no need to add prctl(), if A can ptrace B and B can ptrace A, > leaking info between them should not be a big deal. You can probably > find existing macros doing neccessary checks.
Until one of them is security managed so it shouldn't be able to ptrace the other, or (and this is the nasty one) when a process is executing code it wants to protect from the rest of the same process (eg an untrusted jvm, javascript or probably nastiest of all webassembly)
We don't need a prctl for trusted/untrusted IMHO but we do eventually need to think about API's for "this lot is me but I don't trust it" (flatpack, docker, etc) and for what JIT engines need to do.
Alan
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