On 08/26, Cyrill Gorcunov wrote: > > On Mon, Aug 25, 2014 at 09:12:07PM +0200, Oleg Nesterov wrote: > > + vma = find_vma(current->mm, addr); > > + if (vma) { > > + unsigned long end = addr + size; > > + > > + if (vma->vm_flags & VM_GROWSDOWN) > > + end += PAGE_SIZE * 5; > > + > > + if (end < addr || end > vma->vm_start) > > + goto invalid; > > Looks good to me, but I somehow missed in first version of the patch > too the following aspect -- end > vma->vm_start? Maybe end >= vma->vm_end?
I think ">" is correct, the last byte is "addr + size - 1". Otherwise, say, find_vma_intersection() is buggy. But this doesn't matter, please see v3. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/