| Date | Wed, 12 Dec 2018 19:02:28 -0800 | From | Matthew Wilcox <> | Subject | Re: [RFC PATCH v1 0/5] Add support for O_MAYEXEC |
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On Wed, Dec 12, 2018 at 09:17:07AM +0100, Mickaël Salaün wrote: > The goal of this patch series is to control script interpretation. A > new O_MAYEXEC flag used by sys_open() is added to enable userland script > interpreter to delegate to the kernel (and thus the system security > policy) the permission to interpret scripts or other files containing > what can be seen as commands.
I don't have a problem with the concept, but we're running low on O_ bits. Does this have to be done before the process gets a file descriptor, or could we have a new syscall? Since we're going to be changing the interpreters anyway, it doesn't seem like too much of an imposition to ask them to use:
int verify_for_exec(int fd)
instead of adding an O_MAYEXEC.
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