policies-may-only-be-set-on-directories

   1 ext4 crypto: policies may only be set on directories
   2
   3 Thanks to Chao Yu <chao2.yu@samsung.com> for pointing out we were
   4 missing this check.
   5
   6 Signed-off-by: Theodore Ts'o <tytso@mit.edu>
   7 ---
   8  fs/ext4/crypto_policy.c | 2 ++
   9  1 file changed, 2 insertions(+)
  10
  11 diff --git a/fs/ext4/crypto_policy.c b/fs/ext4/crypto_policy.c
  12 index 81980a15..a1d434d 100644
  13 --- a/fs/ext4/crypto_policy.c
  14 +++ b/fs/ext4/crypto_policy.c
  15 @@ -93,6 +93,8 @@ int ext4_process_policy(const struct ext4_encryption_policy *policy,
  16                 return -EINVAL;
  17
  18         if (!ext4_inode_has_encryption_context(inode)) {
  19 +               if (!S_ISDIR(inode->i_mode))
  20 +                       return -EINVAL;
  21                 if (!ext4_empty_dir(inode))
  22                         return -ENOTEMPTY;
  23                 return ext4_create_encryption_context_from_policy(inode,