From: Mark Fasheh <mark.fasheh@oracle.com>
Date: Wed, 19 Dec 2007 02:58:18 +0000 (-0800)
Subject: ocfs2: Add missing permission checks
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=0957f00796157564281ea6ff2cea7ef4f897775a;p=openwrt%2Fstaging%2Fblogic.git

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>
---

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;