POSIX requires that "If the file size is increased, the extended area shall appear as if it were zero-filled". It is possible to use mmap to write past EOF and that data will become visible instead of zeroes. Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> --- fs/afs/inode.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/afs/inode.c b/fs/afs/inode.c index 6d3a3dbe4928..92e2ba7625de 100644 --- a/fs/afs/inode.c +++ b/fs/afs/inode.c @@ -854,6 +854,8 @@ static void afs_setattr_edit_file(struct afs_operation *op) if (size < i_size) truncate_pagecache(inode, size); + else + truncate_pagecache(inode, i_size); if (size != i_size) fscache_resize_cookie(afs_vnode_cache(vp->vnode), vp->scb.status.size); -- 2.35.1
