ocfs2: Add missing permission checks

Check that an online resize is being driven by a user with permission to
change system resource limits.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index 7003d5820d79..5177fba5162b 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -144,12 +144,18 @@ int ocfs2_ioctl(struct inode * inode, struct file * filp,
 
                 return ocfs2_change_file_space(filp, cmd, &sr);
         case OCFS2_IOC_GROUP_EXTEND:
+                if (!capable(CAP_SYS_RESOURCE))
+                        return -EPERM;
+
                 if (get_user(new_clusters, (int __user *)arg))
                         return -EFAULT;
 
                 return ocfs2_group_extend(inode, new_clusters);
         case OCFS2_IOC_GROUP_ADD:
         case OCFS2_IOC_GROUP_ADD64:
+                if (!capable(CAP_SYS_RESOURCE))
+                        return -EPERM;
+
                 if (copy_from_user(&input, (int __user *) arg, sizeof(input)))
                         return -EFAULT;