Messages in this thread | | | Date | Tue, 8 Apr 2003 02:06:00 -0300 | From | Werner Almesberger <> | Subject | Re: [PATCH] new syscall: flink |
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I wrote: > Example: I write some kind of RAID mounted at /world, that contains > my disk under /world/disk, and some Flash storage under /world/flash. > I protect /world/flash against writes by other people. If a > read-only FD could be turned into something writeable, some malicious > creature could "wear out" my Flash by writing to it a lot of times.
Just to clarify: the file in question would be inaccessible for the abuser, and the read-only fd would have to be handed out by some access mediator.
Obviously, if the abuser obtains a read-only fd directly by opening a file, the hypothetical flink couldn't be used for privilege escalation.
- Werner
-- _________________________________________________________________________ / Werner Almesberger, Buenos Aires, Argentina wa@almesberger.net / /_http://www.almesberger.net/____________________________________________/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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