If a page is inaccesible and it is used for things like sendfile, then
the content of the page is not always touched, and can be passed
directly to a driver, causing issues.
This patch fixes the issue by adding a call to arch_make_page_accessible
in page_cache_pipe_buf_confirm; this fixes the issue.
Fixes: f28d43636d6f ("mm/gup/writeback: add callbacks for inaccessible pages")
Signed-off-by: Claudio Imbrenda <imbre...@linux.ibm.com>
---
fs/splice.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/splice.c b/fs/splice.c
index 4735defc46ee..f026e0ce9acd 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -106,6 +106,9 @@ static int page_cache_pipe_buf_confirm(struct
pipe_inode_info *pipe,
struct page *page = buf->page;
int err;
+ if (arch_make_page_accessible(page))
+ return -EIO;
+
if (!PageUptodate(page)) {
lock_page(page);
--
2.25.4
