#include <linux/mm.h>
#include <linux/dma-mapping.h>
#include <linux/sched.h>
+#include <linux/export.h>
#include <linux/hugetlb.h>
#include <linux/dma-attrs.h>
#include <linux/slab.h>
if (dmasync)
dma_set_attr(DMA_ATTR_WRITE_BARRIER, &attrs);
+ if (!size)
+ return ERR_PTR(-EINVAL);
+
+ /*
+ * If the combination of the addr and size requested for this memory
+ * region causes an integer overflow, return error.
+ */
+ if (((addr + size) < addr) ||
+ PAGE_ALIGN(addr + size) < (addr + size))
+ return ERR_PTR(-EINVAL);
+
if (!can_do_mlock())
return ERR_PTR(-EPERM);
} else
down_write(&mm->mmap_sem);
- current->mm->locked_vm -= diff;
+ current->mm->pinned_vm -= diff;
up_write(&mm->mmap_sem);
mmput(mm);
kfree(umem);