On Sat, 12 Jan 2019 16:19:00 +0300, Lev Olshvang said: > The fact that the text segment could be modified is bad news from the > security standpoint.
We've known that for at least a decade now. Maybe longer. And we already had this discussion once, about a week ago. > I am not sure whether it is actually happening, perhaps instead new pages are > allocated, sort of COW (copy on write). In which case, you should probably stop and verify if it's happening. > And here I am getting to the point : > Is there any way to disable the change of permission bits of PTE? Is it > possible in the hardware (ARM) or should kernel be patched? Are you sure you want to disable *all* changes of a PTE? Hint: Figure out how shared libraries are loaded before you go any further. _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
