On Tue, Aug 03, 2021 at 08:31:34PM +0100, Matthew Wilcox (Oracle) wrote: > Check that the file tail does not cross a page boundary. Requested by > Andreas. > > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Looks good, Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx> --D > --- > fs/iomap/buffered-io.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c > index 8ee0211bea86..586d9d078ce1 100644 > --- a/fs/iomap/buffered-io.c > +++ b/fs/iomap/buffered-io.c > @@ -215,6 +215,8 @@ static int iomap_read_inline_data(struct inode *inode, struct page *page, > if (PageUptodate(page)) > return PAGE_SIZE - poff; > > + if (WARN_ON_ONCE(size > PAGE_SIZE - poff)) > + return -EIO; > if (WARN_ON_ONCE(size > PAGE_SIZE - > offset_in_page(iomap->inline_data))) > return -EIO; > -- > 2.30.2 >
