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ubifs: Enforce crypto policy in mmap

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We need this extra check in mmap because a process could
gain an already opened fd.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2016-09-29 20:44:05 +02:00
parent 700eada82a
commit 959c2de2b3
1 changed files with 9 additions and 0 deletions
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9
fs/ubifs/file.c
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@ -1594,6 +1594,15 @@ static const struct vm_operations_struct ubifs_file_vm_ops = {
static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma)
{
int err;
struct inode *inode = file->f_mapping->host;
if (ubifs_crypt_is_encrypted(inode)) {
err = fscrypt_get_encryption_info(inode);
if (err)
return -EACCES;
if (!fscrypt_has_encryption_key(inode))
return -ENOKEY;
}
err = generic_file_mmap(file, vma);
if (err)