diff options
| -rw-r--r-- | lib/iov_iter.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/lib/iov_iter.c b/lib/iov_iter.c index c3ca28ca68a6..e9a8fc9ee8ee 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -703,17 +703,16 @@ static inline bool page_copy_sane(struct page *page, size_t offset, size_t n) head = compound_head(page); v += (page - head) << PAGE_SHIFT; - if (likely(n <= v && v <= (page_size(head)))) - return true; - WARN_ON(1); - return false; + if (WARN_ON(n > v || v > page_size(head))) + return false; + return true; } size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes, struct iov_iter *i) { size_t res = 0; - if (unlikely(!page_copy_sane(page, offset, bytes))) + if (!page_copy_sane(page, offset, bytes)) return 0; if (unlikely(iov_iter_is_pipe(i))) return copy_page_to_iter_pipe(page, offset, bytes, i); @@ -808,7 +807,7 @@ size_t copy_page_from_iter_atomic(struct page *page, unsigned offset, size_t byt struct iov_iter *i) { char *kaddr = kmap_atomic(page), *p = kaddr + offset; - if (unlikely(!page_copy_sane(page, offset, bytes))) { + if (!page_copy_sane(page, offset, bytes)) { kunmap_atomic(kaddr); return 0; } |