| From | Florian Weimer <> | Subject | Re: [RFC PATCH v1 0/5] Add support for O_MAYEXEC | Date | Thu, 13 Dec 2018 06:22:00 +0100 |
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* Matthew Wilcox:
> 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.
Will this work for auditing?
Maybe add an interface which explicitly upgrades O_PATH descriptors, and give that a separate flag argument? I suppose that would be more friendly to auditing.
Thanks, Florian
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