A wrong return value from ovl_check_encode_origin() would cause
ovl_dentry_to_fid() to try to encode fid from NULL upper dentry.
Reported-by: syzbot+2208f82282740c1c8915@syzkaller.appspotmail.com
Fixes:
16aac5ad1fa9 ("ovl: support encoding non-decodable file handles")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
/* Lower file handle for non-upper non-decodable */
if (!ovl_dentry_upper(dentry) && !decodable)
- return 0;
+ return 1;
/* Upper file handle for pure upper */
if (!ovl_dentry_lower(dentry))