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    SubjectRe: [PATCH 1/2] No-exec support for ppc64
    Jake Moilanen writes:

    > diff -puN fs/binfmt_elf.c~nx-user-ppc64 fs/binfmt_elf.c
    > --- linux-2.6-bk/fs/binfmt_elf.c~nx-user-ppc64 2005-03-08 16:08:54 -06:00
    > +++ linux-2.6-bk-moilanen/fs/binfmt_elf.c 2005-03-08 16:08:54 -06:00
    > @@ -99,6 +99,8 @@ static int set_brk(unsigned long start,
    > up_write(&current->mm->mmap_sem);
    > if (BAD_ADDR(addr))
    > return addr;
    > +
    > + sys_mprotect(start, end-start, PROT_READ|PROT_WRITE|PROT_EXEC);

    I don't think I can push that upstream. What happens if you leave
    that out?

    More generally, we are making a user-visible change, even for programs
    that aren't marked as having non-executable stack or heap, because we
    are now enforcing that the program can't execute from mappings that
    don't have PROT_EXEC. Perhaps we should enforce the requirement for
    execute permission only on those programs that indicate somehow that
    they can handle it?

    Paul.
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