Messages in this thread | | | From | Richard Weinberger <> | Subject | ext4, f2fs: fscrypt_has_permitted_context() check in file open | Date | Thu, 22 Sep 2016 14:24:35 +0200 |
| |
Hi!
Both ext4 and f2fs check in the file open code the context of the parent directory too:
ext4: if (ext4_encrypted_inode(d_inode(dir)) && !fscrypt_has_permitted_context(d_inode(dir), inode)) { ext4_warning(inode->i_sb, "Inconsistent encryption contexts: %lu/%lu", (unsigned long) d_inode(dir)->i_ino, (unsigned long) inode->i_ino); dput(dir); return -EPERM; }
f2fs: if (f2fs_encrypted_inode(d_inode(dir)) && !fscrypt_has_permitted_context(d_inode(dir), inode)) { dput(dir); return -EPERM; }
Why do we need this check? AFAIK this situation can never happen unless due to a bug in the filesystem code.
Thanks, //richard
| |