Index: /trunk/src/VBox/Additions/linux/sharedfolders/regops.c
===================================================================
--- /trunk/src/VBox/Additions/linux/sharedfolders/regops.c	(revision 80581)
+++ /trunk/src/VBox/Additions/linux/sharedfolders/regops.c	(revision 80582)
@@ -348,5 +348,5 @@
                 if (pSrcIter->type & ITER_KVEC)
                     memcpy(pbDst, (void *)pSrcIter->iov->iov_base + pSrcIter->iov_offset, cbThisCopy);
-                else if (!copy_from_user(pbDst, pSrcIter->iov->iov_base + pSrcIter->iov_offset, cbThisCopy))
+                else if (copy_from_user(pbDst, pSrcIter->iov->iov_base + pSrcIter->iov_offset, cbThisCopy) != 0)
                     break;
                 pbDst    += cbThisCopy;
@@ -387,5 +387,5 @@
                 if (pDstIter->type & ITER_KVEC)
                     memcpy((void *)pDstIter->iov->iov_base + pDstIter->iov_offset, pbSrc, cbThisCopy);
-                else if (!copy_to_user(pDstIter->iov->iov_base + pDstIter->iov_offset, pbSrc, cbThisCopy)) {
+                else if (copy_to_user(pDstIter->iov->iov_base + pDstIter->iov_offset, pbSrc, cbThisCopy) != 0) {
                     break;
                 }