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| author | Eric Biggers <ebiggers@google.com> | 2016-12-01 11:55:51 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-12-01 11:55:51 -0500 |
| commit | ba679017ef0f47d31c50df731441fdd39bf4bf13 (patch) | |
| tree | 179877807c40bda7a4ee18a0ad6e26e65d3ba473 /fs/ext4 | |
| parent | 35997d1ce8b01f9f002dd080c59e22430ead6db1 (diff) | |
| download | linux-ba679017ef0f47d31c50df731441fdd39bf4bf13.tar.gz linux-ba679017ef0f47d31c50df731441fdd39bf4bf13.tar.bz2 linux-ba679017ef0f47d31c50df731441fdd39bf4bf13.zip | |
ext4: disable pwsalt ioctl when encryption disabled by config
On a CONFIG_EXT4_FS_ENCRYPTION=n kernel, the ioctls to get and set
encryption policies were disabled but EXT4_IOC_GET_ENCRYPTION_PWSALT was
not. But there's no good reason to expose the pwsalt ioctl if the
kernel doesn't support encryption. The pwsalt ioctl was also disabled
pre-4.8 (via ext4_sb_has_crypto() previously returning 0 when encryption
was disabled by config) and seems to have been enabled by mistake when
ext4 encryption was refactored to use fs/crypto/. So let's disable it
again.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/ioctl.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 560afe08a5ca..fcc9510a819c 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -191,6 +191,7 @@ journal_err_out: return err; } +#ifdef CONFIG_EXT4_FS_ENCRYPTION static int uuid_is_zero(__u8 u[16]) { int i; @@ -200,6 +201,7 @@ static int uuid_is_zero(__u8 u[16]) return 0; return 1; } +#endif static int ext4_ioctl_setflags(struct inode *inode, unsigned int flags) @@ -802,6 +804,7 @@ resizefs_out: #endif } case EXT4_IOC_GET_ENCRYPTION_PWSALT: { +#ifdef CONFIG_EXT4_FS_ENCRYPTION int err, err2; struct ext4_sb_info *sbi = EXT4_SB(sb); handle_t *handle; @@ -836,6 +839,9 @@ resizefs_out: sbi->s_es->s_encrypt_pw_salt, 16)) return -EFAULT; return 0; +#else + return -EOPNOTSUPP; +#endif } case EXT4_IOC_GET_ENCRYPTION_POLICY: { #ifdef CONFIG_EXT4_FS_ENCRYPTION |