1 files changed, 3 insertions, 0 deletions

diff --git a/mm/filemap.c b/mm/filemap.c
index c7fe2f16503f..50b52fe51937 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1732,6 +1732,9 @@ find_page:
                         if (inode->i_blkbits == PAGE_SHIFT ||
                                         !mapping->a_ops->is_partially_uptodate)
                                 goto page_not_up_to_date;
+                        /* pipes can't handle partially uptodate pages */
+                        if (unlikely(iter->type & ITER_PIPE))
+                                goto page_not_up_to_date;
                         if (!trylock_page(page))
                                 goto page_not_up_to_date;
                         /* Did it get truncated before we got the lock? */