* bit is set, or if the expected stack growth is unlimited:
*/
if (sysctl_legacy_va_layout ||
- (current->personality & ADDR_COMPAT_LAYOUT) ||
- current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY) {
+ (current->personality & ADDR_COMPAT_LAYOUT) ||
+ current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY) {
mm->mmap_base = TASK_UNMAPPED_BASE;
mm->get_unmapped_area = arch_get_unmapped_area;
mm->unmap_area = arch_unmap_area;
#endif
mm->mmap_base = TASK_UNMAPPED_BASE;
if (current->flags & PF_RANDOMIZE) {
- /* Add 28bit randomness which is about 40bits of address space
- because mmap base has to be page aligned.
- or ~1/128 of the total user VM
- (total user address space is 47bits) */
+ /*
+ * Add 28bit randomness which is about 40bits of
+ * address space because mmap base has to be page
+ * aligned. or ~1/128 of the total user VM (total
+ * user address space is 47bits)
+ */
unsigned rnd = get_random_int() & 0xfffffff;
+
mm->mmap_base += ((unsigned long)rnd) << PAGE_SHIFT;
}
mm->get_unmapped_area = arch_get_unmapped_area;