Messages in this thread | | | From | (David Wagner) | Subject | Re: [patch] remove MNT_NOEXEC check for PROT_EXEC mmaps | Date | Wed, 4 Oct 2006 03:11:40 +0000 (UTC) |
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Ulrich Drepper wrote: >noexec mounts the way _you_ want them are completely, utterly useless. >nonexec mounts as they are today plus an upcoming mprotect patch give >fine grained control.
Are you familiar with the mmap(PROT_EXEC, MAP_ANONYMOUS) loophole?
Even with the upcoming mprotect patch, it will still be straightforward to circumvent the noexec protections.
>You have to use additional mechanism like SELinux >to fill in all the holes but that's OK.
Is it even possible to use SELinux to fill in all the holes? Can you point me to the SELinux policy that fills in all the holes (including, for instance, addressing mmap(PROT_EXEC, MAP_ANONYMOUS))? - 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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