fuse: fix "direct_io" private mmap

MAP_PRIVATE mmap could return stale data from the cache for "direct_io" files. Fix this by flushing the cache on mmap. Found with a slightly modified fsx-linux. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

fuse: fix "direct_io" private mmap
MAP_PRIVATE mmap could return stale data from the cache for "direct_io" files. Fix this by flushing the cache on mmap. Found with a slightly modified fsx-linux. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Miklos Szeredi
1 parent ce60a2f157
Showing 1 changed file with 2 additions and 0 deletions Side-by-side Diff
fs/fuse/file.c
@@ -1298,6 +1298,8 @@
 	if (vma->vm_flags & VM_MAYSHARE)
 		return -ENODEV;
  
+	invalidate_inode_pages2(file->f_mapping);
+
 	return generic_file_mmap(file, vma);
 }
...	...	@@ -1298,6 +1298,8 @@
1298	1298	if (vma->vm_flags & VM_MAYSHARE)
1299	1299	return -ENODEV;
1300	1300
	1301	+ invalidate_inode_pages2(file->f_mapping);
	1302	+
1301	1303	return generic_file_mmap(file, vma);
1302	1304	}
1303	1305