diff options
| author | Eric Biggers <ebiggers@google.com> | 2016-11-26 19:07:49 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-12-11 16:26:07 -0500 |
| commit | db717d8e26c2d1b0dba3e08668a1e6a7f665adde (patch) | |
| tree | 43fd594156e48c3270f52125d5fe0e9e5e50d417 /fs/f2fs | |
| parent | 8048123576d1011e186b1f62478bcd06ac7cabc8 (diff) | |
| download | linux-stable-db717d8e26c2d1b0dba3e08668a1e6a7f665adde.tar.gz linux-stable-db717d8e26c2d1b0dba3e08668a1e6a7f665adde.tar.bz2 linux-stable-db717d8e26c2d1b0dba3e08668a1e6a7f665adde.zip | |
fscrypto: move ioctl processing more fully into common code
Multiple bugs were recently fixed in the "set encryption policy" ioctl.
To make it clear that fscrypt_process_policy() and fscrypt_get_policy()
implement ioctls and therefore their implementations must take standard
security and correctness precautions, rename them to
fscrypt_ioctl_set_policy() and fscrypt_ioctl_get_policy(). Make the
latter take in a struct file * to make it consistent with the former.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/f2fs.h | 4 | ||||
| -rw-r--r-- | fs/f2fs/file.c | 19 |
2 files changed, 4 insertions, 19 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 9e8de18a168a..8e94b7bda42b 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -2453,8 +2453,8 @@ static inline bool f2fs_may_encrypt(struct inode *inode) #define fscrypt_pullback_bio_page fscrypt_notsupp_pullback_bio_page #define fscrypt_restore_control_page fscrypt_notsupp_restore_control_page #define fscrypt_zeroout_range fscrypt_notsupp_zeroout_range -#define fscrypt_process_policy fscrypt_notsupp_process_policy -#define fscrypt_get_policy fscrypt_notsupp_get_policy +#define fscrypt_ioctl_set_policy fscrypt_notsupp_ioctl_set_policy +#define fscrypt_ioctl_get_policy fscrypt_notsupp_ioctl_get_policy #define fscrypt_has_permitted_context fscrypt_notsupp_has_permitted_context #define fscrypt_inherit_context fscrypt_notsupp_inherit_context #define fscrypt_get_encryption_info fscrypt_notsupp_get_encryption_info diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index c7865073cd26..f0c83f74557d 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1752,31 +1752,16 @@ static bool uuid_is_nonzero(__u8 u[16]) static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg) { - struct fscrypt_policy policy; struct inode *inode = file_inode(filp); - if (copy_from_user(&policy, (struct fscrypt_policy __user *)arg, - sizeof(policy))) - return -EFAULT; - f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); - return fscrypt_process_policy(filp, &policy); + return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); } static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg) { - struct fscrypt_policy policy; - struct inode *inode = file_inode(filp); - int err; - - err = fscrypt_get_policy(inode, &policy); - if (err) - return err; - - if (copy_to_user((struct fscrypt_policy __user *)arg, &policy, sizeof(policy))) - return -EFAULT; - return 0; + return fscrypt_ioctl_get_policy(filp, (void __user *)arg); } static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) |