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ubifs: don't bother checking for encryption key in ->mmap() 

Since only an open file can be mmap'ed, and we only allow open()ing an
encrypted file when its key is available, there is no need to check for
the key again before permitting each mmap().

Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Eric Biggers 2017-05-22 17:39:44 -07:00 committed by Richard Weinberger
parent 4afb9996a2
commit af65936a7a
1 changed files with 0 additions and 9 deletions
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9
fs/ubifs/file.c
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@ -1615,15 +1615,6 @@ 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)