iov_iter_extract_kvec_pages() isn't quite right. The problem is that there's not currently any path by which it can be tested, as currently iov_iter_get_pages*() balk at it, but I managed to do that by piggybacking some testing code on my cifs patches. The attached change fixes the problem. David --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -2080,9 +2080,9 @@ static ssize_t iov_iter_extract_kvec_pages(struct iov_iter *i, skip = 0; } - offset = skip % PAGE_SIZE; + kaddr = i->kvec->iov_base + skip; + offset = (unsigned long)kaddr & ~PAGE_MASK; *offset0 = offset; - kaddr = i->kvec->iov_base; maxpages = want_pages_array(pages, maxsize, offset, maxpages); if (!maxpages)
