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asmlinkage long sys_chroot(const char _user * filename) {

Address space randomization has been augmented further during the development of kernel 2.6.25. It is now possible to randomize the address of the heap, traditionally called brk address. The randomization is, however, only performed if the new configuration option compat_brk is not set because some ancient propgrams are not compatible with a randomized heap address. On the technical level, brk randomization works as all other randomization techniques introduced in this chapter.

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