Messages in this thread | | | Date | Thu, 16 Jul 2020 22:06:01 +0100 | From | Matthew Wilcox <> | Subject | Re: [PATCH v4 1/2] kernel: Implement selective syscall userspace redirection |
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On Thu, Jul 16, 2020 at 03:31:40PM -0400, Gabriel Krisman Bertazi wrote: > selector is an optional pointer to a char-sized userspace memory region > that has a key switch for the mechanism. This key switch is set to > either PR_SYS_DISPATCH_ON, PR_SYS_DISPATCH_OFF to enable and disable the > redirection without calling the kernel. > > The feature is meant to be set per-thread and it is disabled on > fork/clone/execv.
Disabled on exec. Disabled in the child on clone/fork (and vfork, I think).
That means we don't need to worry about it interacting badly with a setuid program, right?
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