[GIT PULL 20/37] lightnvm: centralize permission check for lightnvm ioctl
From: Matias Bjørling <hidden>
Date: 2018-03-29 22:07:35
Also in:
lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Johannes Thumshirn <redacted> 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 <redacted> Signed-off-by: Matias Bjørling <redacted> --- drivers/lightnvm/core.c | 21 +++------------------ 1 file 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);
--
2.11.0