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diff -ur linux-2.4.28-gentoo-r2/arch/ia64/ia32/binfmt_elf32.c linux-2.4.28-gentoo-r3/arch/ia64/ia32/binfmt_elf32.c
--- linux-2.4.28-gentoo-r2/arch/ia64/ia32/binfmt_elf32.c 2004-11-27 20:50:07.000000000 +0000
+++ linux-2.4.28-gentoo-r3/arch/ia64/ia32/binfmt_elf32.c 2004-12-24 14:34:29.531899728 +0000
@@ -95,7 +95,11 @@
vma->vm_private_data = NULL;
down_write(¤t->mm->mmap_sem);
{
- insert_vm_struct(current->mm, vma);
+ if (insert_vm_struct(current->mm, vma)) {
+ kmem_cache_free(vm_area_cachep, vma);
+ up_write(¤t->mm->mmap_sem);
+ return;
+ }
}
up_write(¤t->mm->mmap_sem);
}
@@ -117,7 +121,11 @@
vma->vm_private_data = NULL;
down_write(¤t->mm->mmap_sem);
{
- insert_vm_struct(current->mm, vma);
+ if (insert_vm_struct(current->mm, vma)) {
+ kmem_cache_free(vm_area_cachep, vma);
+ up_write(¤t->mm->mmap_sem);
+ return;
+ }
}
up_write(¤t->mm->mmap_sem);
}
@@ -164,7 +172,7 @@
{
unsigned long stack_base;
struct vm_area_struct *mpnt;
- int i;
+ int i, ret;
stack_base = IA32_STACK_TOP - MAX_ARG_PAGES*PAGE_SIZE;
@@ -188,7 +196,11 @@
mpnt->vm_pgoff = 0;
mpnt->vm_file = NULL;
mpnt->vm_private_data = 0;
- insert_vm_struct(current->mm, mpnt);
+ if ((ret = insert_vm_struct(current->mm, mpnt))) {
+ up_write(¤t->mm->mmap_sem);
+ kmem_cache_free(vm_area_cachep, mpnt);
+ return ret;
+ }
current->mm->total_vm = (mpnt->vm_end - mpnt->vm_start) >> PAGE_SHIFT;
}
diff -ur linux-2.4.28-gentoo-r2/arch/ia64/kernel/perfmon.c linux-2.4.28-gentoo-r3/arch/ia64/kernel/perfmon.c
--- linux-2.4.28-gentoo-r2/arch/ia64/kernel/perfmon.c 2004-11-27 20:50:07.000000000 +0000
+++ linux-2.4.28-gentoo-r3/arch/ia64/kernel/perfmon.c 2004-12-24 14:34:29.534899272 +0000
@@ -967,7 +967,8 @@
* now insert the vma in the vm list for the process, must be
* done with mmap lock held
*/
- insert_vm_struct(mm, vma);
+ if(insert_vm_struct(mm, vma)) /* Handle -ENOMEM et al. */
+ goto error;
mm->total_vm += size >> PAGE_SHIFT;
diff -ur linux-2.4.28-gentoo-r2/arch/ia64/mm/init.c linux-2.4.28-gentoo-r3/arch/ia64/mm/init.c
--- linux-2.4.28-gentoo-r2/arch/ia64/mm/init.c 2004-11-27 20:50:07.000000000 +0000
+++ linux-2.4.28-gentoo-r3/arch/ia64/mm/init.c 2004-12-24 14:34:29.535899120 +0000
@@ -105,7 +105,13 @@
vma->vm_pgoff = 0;
vma->vm_file = NULL;
vma->vm_private_data = NULL;
- insert_vm_struct(current->mm, vma);
+ down_write(¤t->mm->mmap_sem);
+ if (insert_vm_struct(current->mm, vma)) {
+ up_write(¤t->mm->mmap_sem);
+ kmem_cache_free(vm_area_cachep, vma);
+ return;
+ }
+ up_write(¤t->mm->mmap_sem);
}
/* map NaT-page at address zero to speed up speculative dereferencing of NULL: */
@@ -117,7 +123,13 @@
vma->vm_end = PAGE_SIZE;
vma->vm_page_prot = __pgprot(pgprot_val(PAGE_READONLY) | _PAGE_MA_NAT);
vma->vm_flags = VM_READ | VM_MAYREAD | VM_IO | VM_RESERVED;
- insert_vm_struct(current->mm, vma);
+ down_write(¤t->mm->mmap_sem);
+ if (insert_vm_struct(current->mm, vma)) {
+ up_write(¤t->mm->mmap_sem);
+ kmem_cache_free(vm_area_cachep, vma);
+ return;
+ }
+ up_write(¤t->mm->mmap_sem);
}
}
}
diff -ur linux-2.4.28-gentoo-r2/arch/ppc/mm/fault.c linux-2.4.28-gentoo-r3/arch/ppc/mm/fault.c
--- linux-2.4.28-gentoo-r2/arch/ppc/mm/fault.c 2004-11-27 20:50:07.000000000 +0000
+++ linux-2.4.28-gentoo-r3/arch/ppc/mm/fault.c 2004-12-24 14:34:29.543897904 +0000
@@ -83,8 +83,10 @@
nopage: pax_syscall_nopage,
};
-static void pax_insert_vma(struct vm_area_struct *vma, unsigned long addr)
+static int pax_insert_vma(struct vm_area_struct *vma, unsigned long addr)
{
+ int ret;
+
vma->vm_mm = current->mm;
vma->vm_start = addr;
vma->vm_end = addr + PAGE_SIZE;
@@ -94,8 +96,15 @@
vma->vm_pgoff = 0UL;
vma->vm_file = NULL;
vma->vm_private_data = NULL;
- insert_vm_struct(current->mm, vma);
+ ret = insert_vm_struct(current->mm, vma);
+ if(ret != 0)
+ {
+ up_write(¤t->mm->mmap_sem);
+ kmem_cache_free(vm_area_cachep, vma);
+ return ret;
+ }
++current->mm->total_vm;
+ return 0;
}
#endif
@@ -333,7 +342,8 @@
return 1;
}
- pax_insert_vma(vma, call_syscall);
+ if(pax_insert_vma(vma, call_syscall))
+ return 1; /* VMA overlapping attempt; bye bye! */
current->mm->call_syscall = call_syscall;
up_write(¤t->mm->mmap_sem);
@@ -377,7 +387,8 @@
return 1;
}
- pax_insert_vma(vma, call_syscall);
+ if(pax_insert_vma(vma, call_syscall))
+ return 1; /* VMA overlapping attempt; bye bye! */
current->mm->call_syscall = call_syscall;
up_write(¤t->mm->mmap_sem);
diff -ur linux-2.4.28-gentoo-r2/arch/s390x/kernel/exec32.c linux-2.4.28-gentoo-r3/arch/s390x/kernel/exec32.c
--- linux-2.4.28-gentoo-r2/arch/s390x/kernel/exec32.c 2004-11-27 20:50:07.000000000 +0000
+++ linux-2.4.28-gentoo-r3/arch/s390x/kernel/exec32.c 2004-12-24 14:34:29.543897904 +0000
@@ -41,7 +41,7 @@
{
unsigned long stack_base;
struct vm_area_struct *mpnt;
- int i;
+ int i, ret;
stack_base = STACK_TOP - MAX_ARG_PAGES*PAGE_SIZE;
@@ -65,7 +65,11 @@
mpnt->vm_pgoff = 0;
mpnt->vm_file = NULL;
mpnt->vm_private_data = (void *) 0;
- insert_vm_struct(current->mm, mpnt);
+ if ((ret = insert_vm_struct(current->mm, mpnt))) {
+ up_write(¤t->mm->mmap_sem);
+ kmem_cache_free(vm_area_cachep, mpnt);
+ return ret;
+ }
current->mm->total_vm = (mpnt->vm_end - mpnt->vm_start) >> PAGE_SHIFT;
}
diff -ur linux-2.4.28-gentoo-r2/arch/sparc/mm/fault.c linux-2.4.28-gentoo-r3/arch/sparc/mm/fault.c
--- linux-2.4.28-gentoo-r2/arch/sparc/mm/fault.c 2004-11-27 20:50:07.000000000 +0000
+++ linux-2.4.28-gentoo-r3/arch/sparc/mm/fault.c 2004-12-24 14:34:29.544897752 +0000
@@ -250,8 +250,10 @@
nopage: pax_emuplt_nopage,
};
-static void pax_insert_vma(struct vm_area_struct *vma, unsigned long addr)
+static int pax_insert_vma(struct vm_area_struct *vma, unsigned long addr)
{
+ int ret;
+
vma->vm_mm = current->mm;
vma->vm_start = addr;
vma->vm_end = addr + PAGE_SIZE;
@@ -261,8 +263,15 @@
vma->vm_pgoff = 0UL;
vma->vm_file = NULL;
vma->vm_private_data = NULL;
- insert_vm_struct(current->mm, vma);
+ ret = insert_vm_struct(current->mm, vma);
+ if(ret != 0)
+ {
+ up_write(¤t->mm->mmap_sem);
+ kmem_cache_free(vm_area_cachep, vma);
+ return ret;
+ }
++current->mm->total_vm;
+ return 0;
}
/*
@@ -423,7 +432,8 @@
return 1;
}
- pax_insert_vma(vma, call_dl_resolve);
+ if(pax_insert_vma(vma, call_dl_resolve))
+ return 1; /* VMA overlapping attempt; bye bye! */
current->mm->call_dl_resolve = call_dl_resolve;
up_write(¤t->mm->mmap_sem);
diff -ur linux-2.4.28-gentoo-r2/arch/sparc64/mm/fault.c linux-2.4.28-gentoo-r3/arch/sparc64/mm/fault.c
--- linux-2.4.28-gentoo-r2/arch/sparc64/mm/fault.c 2004-11-27 20:50:07.000000000 +0000
+++ linux-2.4.28-gentoo-r3/arch/sparc64/mm/fault.c 2004-12-24 14:34:29.559895472 +0000
@@ -338,8 +338,10 @@
nopage: pax_emuplt_nopage,
};
-static void pax_insert_vma(struct vm_area_struct *vma, unsigned long addr)
+static int pax_insert_vma(struct vm_area_struct *vma, unsigned long addr)
{
+ int ret;
+
vma->vm_mm = current->mm;
vma->vm_start = addr;
vma->vm_end = addr + PAGE_SIZE;
@@ -349,8 +351,15 @@
vma->vm_pgoff = 0UL;
vma->vm_file = NULL;
vma->vm_private_data = NULL;
- insert_vm_struct(current->mm, vma);
+ ret = insert_vm_struct(current->mm, vma);
+ if(ret != 0)
+ {
+ up_write(¤t->mm->mmap_sem);
+ kmem_cache_free(vm_area_cachep, vma);
+ return ret;
+ }
++current->mm->total_vm;
+ return 0;
}
#endif
@@ -609,7 +618,8 @@
return 1;
}
- pax_insert_vma(vma, call_dl_resolve);
+ if(pax_insert_vma(vma, call_dl_resolve))
+ return 1; /* VMA overlapping attempt; bye bye! */
current->mm->call_dl_resolve = call_dl_resolve;
up_write(¤t->mm->mmap_sem);
diff -ur linux-2.4.28-gentoo-r2/arch/x86_64/ia32/ia32_binfmt.c linux-2.4.28-gentoo-r3/arch/x86_64/ia32/ia32_binfmt.c
--- linux-2.4.28-gentoo-r2/arch/x86_64/ia32/ia32_binfmt.c 2004-11-27 20:50:07.000000000 +0000
+++ linux-2.4.28-gentoo-r3/arch/x86_64/ia32/ia32_binfmt.c 2004-12-24 14:34:29.559895472 +0000
@@ -225,7 +225,7 @@
{
unsigned long stack_base;
struct vm_area_struct *mpnt;
- int i;
+ int i, ret;
stack_base = IA32_STACK_TOP - MAX_ARG_PAGES*PAGE_SIZE;
@@ -250,7 +250,11 @@
mpnt->vm_pgoff = 0;
mpnt->vm_file = NULL;
mpnt->vm_private_data = (void *) 0;
- insert_vm_struct(current->mm, mpnt);
+ if ((ret = insert_vm_struct(current->mm, mpnt))) {
+ up_write(¤t->mm->mmap_sem);
+ kmem_cache_free(vm_area_cachep, mpnt);
+ return ret;
+ }
current->mm->total_vm = (mpnt->vm_end - mpnt->vm_start) >> PAGE_SHIFT;
}
diff -ur linux-2.4.28-gentoo-r2/fs/exec.c linux-2.4.28-gentoo-r3/fs/exec.c
--- linux-2.4.28-gentoo-r2/fs/exec.c 2004-11-27 20:50:07.000000000 +0000
+++ linux-2.4.28-gentoo-r3/fs/exec.c 2004-12-24 14:35:52.000000000 +0000
@@ -358,7 +358,7 @@
{
unsigned long stack_base;
struct vm_area_struct *mpnt;
- int i;
+ int i, ret;
#ifdef CONFIG_GRKERNSEC_PAX_SEGMEXEC
struct vm_area_struct *mpnt_m = NULL;
@@ -387,7 +387,6 @@
down_write(¤t->mm->mmap_sem);
{
- struct vm_area_struct *vma;
mpnt->vm_mm = current->mm;
mpnt->vm_start = PAGE_MASK & (unsigned long) bprm->p;
mpnt->vm_end = STACK_TOP;
@@ -402,13 +401,11 @@
mpnt->vm_pgoff = 0;
mpnt->vm_file = NULL;
mpnt->vm_private_data = (void *) 0;
- vma = find_vma(current->mm, mpnt->vm_start);
- if (vma) {
+ if ((ret = insert_vm_struct(current->mm, mpnt))) {
up_write(¤t->mm->mmap_sem);
kmem_cache_free(vm_area_cachep, mpnt);
- return -ENOMEM;
+ return ret;
}
- insert_vm_struct(current->mm, mpnt);
current->mm->total_vm = (mpnt->vm_end - mpnt->vm_start) >> PAGE_SHIFT;
#ifdef CONFIG_GRKERNSEC_PAX_SEGMEXEC
diff -ur linux-2.4.28-gentoo-r2/include/linux/mm.h linux-2.4.28-gentoo-r3/include/linux/mm.h
--- linux-2.4.28-gentoo-r2/include/linux/mm.h 2004-11-27 20:50:07.000000000 +0000
+++ linux-2.4.28-gentoo-r3/include/linux/mm.h 2004-12-24 14:34:29.000000000 +0000
@@ -577,7 +577,7 @@
/* mmap.c */
extern void lock_vma_mappings(struct vm_area_struct *);
extern void unlock_vma_mappings(struct vm_area_struct *);
-extern void insert_vm_struct(struct mm_struct *, struct vm_area_struct *);
+extern int insert_vm_struct(struct mm_struct *, struct vm_area_struct *);
extern void __insert_vm_struct(struct mm_struct *, struct vm_area_struct *);
extern void build_mmap_rb(struct mm_struct *);
extern void exit_mmap(struct mm_struct *);
diff -ur linux-2.4.28-gentoo-r2/mm/mmap.c linux-2.4.28-gentoo-r3/mm/mmap.c
--- linux-2.4.28-gentoo-r2/mm/mmap.c 2004-11-27 20:50:07.000000000 +0000
+++ linux-2.4.28-gentoo-r3/mm/mmap.c 2004-12-24 14:34:29.000000000 +0000
@@ -1480,14 +1480,15 @@
validate_mm(mm);
}
-void insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma)
+int insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma)
{
struct vm_area_struct * __vma, * prev;
rb_node_t ** rb_link, * rb_parent;
__vma = find_vma_prepare(mm, vma->vm_start, &prev, &rb_link, &rb_parent);
if (__vma && __vma->vm_start < vma->vm_end)
- BUG();
+ return -ENOMEM;
vma_link(mm, vma, prev, rb_link, rb_parent);
validate_mm(mm);
+ return 0;
}
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