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diff -uNrp kernel-3.2.fc16.orig/arch/x86/mm/mmap.c kernel-3.2.fc16.new/arch/x86/mm/mmap.c
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--- kernel-3.2.fc16.orig/arch/x86/mm/mmap.c 2012-03-19 16:47:03.495169091 -0400
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+++ kernel-3.2.fc16.new/arch/x86/mm/mmap.c 2012-03-19 16:50:03.574168052 -0400
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@@ -106,6 +106,10 @@ static unsigned long mmap_legacy_base(vo
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return TASK_UNMAPPED_BASE + mmap_rnd();
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}
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+#ifdef CONFIG_X86_32
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+ #define SHLIB_BASE 0x00111000
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+#endif
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+
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/*
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* This function, called very early during the creation of a new
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* process VM image, sets up which VM layout function to use:
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@@ -126,8 +126,10 @@ void arch_pick_mmap_layout(struct mm_str
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#ifdef CONFIG_X86_32
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if (!(current->personality & READ_IMPLIES_EXEC)
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&& !(__supported_pte_mask & _PAGE_NX)
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- && mmap_is_ia32())
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+ && mmap_is_ia32()) {
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+ mm->shlib_base = SHLIB_BASE + mmap_rnd();
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mm->get_unmapped_exec_area = arch_get_unmapped_exec_area;
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+ }
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#endif
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mm->unmap_area = arch_unmap_area_topdown;
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}
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diff -uNrp kernel-3.2.fc16.orig/include/linux/mm_types.h kernel-3.2.fc16.new/include/linux/mm_types.h
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--- kernel-3.2.fc16.orig/include/linux/mm_types.h 2012-03-19 16:46:47.382169153 -0400
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+++ kernel-3.2.fc16.new/include/linux/mm_types.h 2012-03-19 16:50:40.738168219 -0400
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@@ -300,6 +300,7 @@ struct mm_struct {
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void (*unmap_area) (struct mm_struct *mm, unsigned long addr);
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#endif
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unsigned long mmap_base; /* base of mmap area */
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+ unsigned long shlib_base; /* base of lib map area (ASCII armour)*/
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unsigned long task_size; /* size of task vm space */
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unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */
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unsigned long free_area_cache; /* first hole of size cached_hole_size or larger */
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diff -uNrp kernel-3.2.fc16.orig/mm/mmap.c kernel-3.2.fc16.new/mm/mmap.c
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--- kernel-3.2.fc16.orig/mm/mmap.c 2012-03-19 16:46:15.791169274 -0400
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+++ kernel-3.2.fc16.new/mm/mmap.c 2012-03-19 16:51:37.351166875 -0400
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@@ -1594,8 +1594,6 @@ static bool should_randomize(void)
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!(current->personality & ADDR_NO_RANDOMIZE);
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}
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-#define SHLIB_BASE 0x00110000
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-
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unsigned long
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arch_get_unmapped_exec_area(struct file *filp, unsigned long addr0,
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unsigned long len0, unsigned long pgoff, unsigned long flags)
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@@ -1612,8 +1610,8 @@ arch_get_unmapped_exec_area(struct file
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return addr;
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if (!addr)
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- addr = !should_randomize() ? SHLIB_BASE :
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- randomize_range(SHLIB_BASE, 0x01000000, len);
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+ addr = !should_randomize() ? mm->shlib_base :
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+ randomize_range(mm->shlib_base, 0x01000000, len);
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if (addr) {
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addr = PAGE_ALIGN(addr);
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@@ -1623,7 +1621,7 @@ arch_get_unmapped_exec_area(struct file
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return addr;
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}
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- addr = SHLIB_BASE;
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+ addr = mm->shlib_base;
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for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
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/* At this point: (!vma || addr < vma->vm_end). */
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if (TASK_SIZE - len < addr)
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