race conditions in ia32 subsystem
A while we discussed the race conditions that are present in the ia32 subsystem when the page size is greater than 4KB. It occurred to me that these problems can be fixed easily and cleanly by using the get_user_pages() routine (this routine was introduced in 2.4.17, if memory serves).
The basic idea would be to use the address space's mmap_sem instead of the global ia32_mmap_sem and to use get_user_pages() instead of copy_from_user()/copy_to_user() to access memory.
Does someone want to take a stab at doing this?
--david
David-
I'm up for taking a stab at this. It might be a week or so, I'm pretty busy right now, but I'll get to it.
Quoted 18 lines · David Mosberger
A while we discussed the race conditions that are present in the ia32 subsystem when the page size is greater than 4KB. It occurred to me that these problems can be fixed easily and cleanly by using the
get_user_pages()routine (this routine was introduced in 2.4.17, if memory serves).The basic idea would be to use the address space's
mmap_seminstead of the globalia32_mmap_semand to useget_user_pages()instead of copy_from_user()/copy_to_user() to access memory.Does someone want to take a stab at doing this?
--david_______________________________________________
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Don Dugger "Censeo Toto nos in Kansa esse decisse." - D. Gale [email protected] Ph: 303/652-0870x117