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authorJohannes Thumshirn <jthumshirn@suse.de>2018-03-30 01:05:07 +0300
committerJens Axboe <axboe@kernel.dk>2018-03-30 02:29:09 +0300
commit40f962d78a969e3b476451ebc82deffdee4309c2 (patch)
tree15a5c44e22829a2d4f298c22a8772c20a6f430a4 /drivers/lightnvm
parenta38c78d82dd38ce178c994a777751fae61ae31c8 (diff)
downloadlinux-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>
Diffstat (limited to 'drivers/lightnvm')
-rw-r--r--drivers/lightnvm/core.c21
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);