On 21.04.21 21:03, Eric W. Biederman wrote:
David Hildenbrand <david@xxxxxxxxxx> writes:
Stumbling over the history of MAP_EXECUTABLE, I noticed that we still
have some in-tree users that we can get rid of.
A good fit for the whole series could be Andrew's tree.
In general this looks like a good cleanup.
Acked-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
As far as I can see we can go after MAP_DENYWRITE the same way.
Today deny_write_access in open_exec is what causes -ETXTBSY
when attempting to write to file that is current executing.
Do you have any plans to look at that?
I did have a look and thought about ripping out MAP_DENYWRITE; I'm still
in the process of connecting the pieces.
Some VM_DENYWRITE e.g., in mm/khugepaged.c still gives me a headache ,
and I'll have to double-check whether it would be okay to just fallback
on checking the actual vm->file.
--
Thanks,
David / dhildenb
