down_read(&mm->mmap_sem);
vma = find_vma_prev(mm, address, &prev_vma);
- if (!vma)
+ if (!vma && !prev_vma )
goto bad_area;
- /* find_vma_prev() returns vma such that address < vma->vm_end or NULL */
- if (address < vma->vm_start)
+ /*
+ * find_vma_prev() returns vma such that address < vma->vm_end or NULL
+ *
+ * May find no vma, but could be that the last vm area is the
+ * register backing store that needs to expand upwards, in
+ * this case vma will be null, but prev_vma will ne non-null
+ */
+ if (( !vma && prev_vma ) || (address < vma->vm_start) )
goto check_expansion;
good_area:
check_expansion:
if (!(prev_vma && (prev_vma->vm_flags & VM_GROWSUP) && (address == prev_vma->vm_end))) {
+ if (!vma)
+ goto bad_area;
if (!(vma->vm_flags & VM_GROWSDOWN))
goto bad_area;
if (REGION_NUMBER(address) != REGION_NUMBER(vma->vm_start)
out_of_memory:
up_read(&mm->mmap_sem);
- if (is_init(current)) {
+ if (is_global_init(current)) {
yield();
down_read(&mm->mmap_sem);
goto survive;
}
printk(KERN_CRIT "VM: killing process %s\n", current->comm);
if (user_mode(regs))
- do_exit(SIGKILL);
+ do_group_exit(SIGKILL);
goto no_context;
}