diff options
| author | Johannes Thumshirn <jthumshirn@suse.de> | 2018-03-30 01:05:07 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-03-30 02:29:09 +0300 |
| commit | 40f962d78a969e3b476451ebc82deffdee4309c2 (patch) | |
| tree | 15a5c44e22829a2d4f298c22a8772c20a6f430a4 | |
| parent | a38c78d82dd38ce178c994a777751fae61ae31c8 (diff) | |
| download | linux-40f962d78a969e3b476451ebc82deffdee4309c2.tar.xz | |
lightnvm: centralize permission check for lightnvm ioctl
Currently all functions for handling the lightnvm core ioctl commands
do a check for CAP_SYS_ADMIN.
Change this to fail early in nvm_ctl_ioctl(), so we don't have to
duplicate the permission checks all over.
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | drivers/lightnvm/core.c | 21 |
1 files changed, 3 insertions, 18 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c index 3eec948d1b7e..5b197d6bb6d9 100644 --- a/drivers/lightnvm/core.c +++ b/drivers/lightnvm/core.c @@ -1019,9 +1019,6 @@ static long nvm_ioctl_info(struct file *file, void __user *arg) struct nvm_tgt_type *tt; int tgt_iter = 0; - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - info = memdup_user(arg, sizeof(struct nvm_ioctl_info)); if (IS_ERR(info)) return -EFAULT; @@ -1060,9 +1057,6 @@ static long nvm_ioctl_get_devices(struct file *file, void __user *arg) struct nvm_dev *dev; int i = 0; - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL); if (!devices) return -ENOMEM; @@ -1103,9 +1097,6 @@ static long nvm_ioctl_dev_create(struct file *file, void __user *arg) { struct nvm_ioctl_create create; - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create))) return -EFAULT; @@ -1141,9 +1132,6 @@ static long nvm_ioctl_dev_remove(struct file *file, void __user *arg) struct nvm_dev *dev; int ret = 0; - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove))) return -EFAULT; @@ -1168,9 +1156,6 @@ static long nvm_ioctl_dev_init(struct file *file, void __user *arg) { struct nvm_ioctl_dev_init init; - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init))) return -EFAULT; @@ -1187,9 +1172,6 @@ static long nvm_ioctl_dev_factory(struct file *file, void __user *arg) { struct nvm_ioctl_dev_factory fact; - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory))) return -EFAULT; @@ -1205,6 +1187,9 @@ static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg) { void __user *argp = (void __user *)arg; + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + switch (cmd) { case NVM_INFO: return nvm_ioctl_info(file, argp); |