ovl: setattr: check permissions before copy-up

[firefly-linux-kernel-4.4.55.git] / fs / overlayfs / super.c

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index ff826652feaeb7e7b753132139089bd496b4f9f5..f42c9407fbad04adee22dd6422f83022d63218fe 100644 (file)
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -9,6 +9,7 @@
 
 #include <linux/fs.h>
 #include <linux/namei.h>
+#include <linux/pagemap.h>
 #include <linux/xattr.h>
 #include <linux/security.h>
 #include <linux/mount.h>
@@ -910,6 +911,7 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
        }
 
        sb->s_stack_depth = 0;
+       sb->s_maxbytes = MAX_LFS_FILESIZE;
        if (ufs->config.upperdir) {
                if (!ufs->config.workdir) {
                        pr_err("overlayfs: missing 'workdir'\n");