ocfs2: deal with __user misannotations

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index a1a1bfd..d96f7f8 100644 (file)
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -864,7 +864,7 @@ int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info,
                if (status)
                        break;
 
-               reqp = (struct ocfs2_info_request *)(unsigned long)req_addr;
+               reqp = (struct ocfs2_info_request __user *)(unsigned long)req_addr;
                if (!reqp) {
                        status = -EINVAL;
                        goto bail;
@@ -888,9 +888,11 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
        struct ocfs2_space_resv sr;
        struct ocfs2_new_group_input input;
        struct reflink_arguments args;
-       const char *old_path, *new_path;
+       const char __user *old_path;
+       const char __user *new_path;
        bool preserve;
        struct ocfs2_info info;
+       void __user *argp = (void __user *)arg;
 
        switch (cmd) {
        case OCFS2_IOC_GETFLAGS:
@@ -937,17 +939,15 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 
                return ocfs2_group_add(inode, &input);
        case OCFS2_IOC_REFLINK:
-               if (copy_from_user(&args, (struct reflink_arguments *)arg,
-                                  sizeof(args)))
+               if (copy_from_user(&args, argp, sizeof(args)))
                        return -EFAULT;
-               old_path = (const char *)(unsigned long)args.old_path;
-               new_path = (const char *)(unsigned long)args.new_path;
+               old_path = (const char __user *)(unsigned long)args.old_path;
+               new_path = (const char __user *)(unsigned long)args.new_path;
                preserve = (args.preserve != 0);
 
                return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve);
        case OCFS2_IOC_INFO:
-               if (copy_from_user(&info, (struct ocfs2_info __user *)arg,
-                                  sizeof(struct ocfs2_info)))
+               if (copy_from_user(&info, argp, sizeof(struct ocfs2_info)))
                        return -EFAULT;
 
                return ocfs2_info_handle(inode, &info, 0);
@@ -960,22 +960,20 @@ long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
                if (!capable(CAP_SYS_ADMIN))
                        return -EPERM;
 
-               if (copy_from_user(&range, (struct fstrim_range *)arg,
-                   sizeof(range)))
+               if (copy_from_user(&range, argp, sizeof(range)))
                        return -EFAULT;
 
                ret = ocfs2_trim_fs(sb, &range);
                if (ret < 0)
                        return ret;
 
-               if (copy_to_user((struct fstrim_range *)arg, &range,
-                   sizeof(range)))
+               if (copy_to_user(argp, &range, sizeof(range)))
                        return -EFAULT;
 
                return 0;
        }
        case OCFS2_IOC_MOVE_EXT:
-               return ocfs2_ioctl_move_extents(filp, (void __user *)arg);
+               return ocfs2_ioctl_move_extents(filp, argp);
        default:
                return -ENOTTY;
        }
@@ -988,6 +986,7 @@ long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
        struct reflink_arguments args;
        struct inode *inode = file->f_path.dentry->d_inode;
        struct ocfs2_info info;
+       void __user *argp = (void __user *)arg;
 
        switch (cmd) {
        case OCFS2_IOC32_GETFLAGS:
@@ -1006,16 +1005,14 @@ long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
        case FITRIM:
                break;
        case OCFS2_IOC_REFLINK:
-               if (copy_from_user(&args, (struct reflink_arguments *)arg,
-                                  sizeof(args)))
+               if (copy_from_user(&args, argp, sizeof(args)))
                        return -EFAULT;
                preserve = (args.preserve != 0);
 
                return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path),
                                           compat_ptr(args.new_path), preserve);
        case OCFS2_IOC_INFO:
-               if (copy_from_user(&info, (struct ocfs2_info __user *)arg,
-                                  sizeof(struct ocfs2_info)))
+               if (copy_from_user(&info, argp, sizeof(struct ocfs2_info)))
                        return -EFAULT;
 
                return ocfs2_info_handle(inode, &info, 1);

diff --git a/fs/ocfs2/move_extents.c b/fs/ocfs2/move_extents.c
index b1e3fce..6083432 100644 (file)
--- a/fs/ocfs2/move_extents.c
+++ b/fs/ocfs2/move_extents.c
@@ -1082,8 +1082,7 @@ int ocfs2_ioctl_move_extents(struct file *filp, void __user *argp)
        context->file = filp;
 
        if (argp) {
-               if (copy_from_user(&range, (struct ocfs2_move_extents *)argp,
-                                  sizeof(range))) {
+               if (copy_from_user(&range, argp, sizeof(range))) {
                        status = -EFAULT;
                        goto out;
                }
@@ -1138,8 +1137,7 @@ out:
         * length and new_offset even if failure happens somewhere.
         */
        if (argp) {
-               if (copy_to_user((struct ocfs2_move_extents *)argp, &range,
-                               sizeof(range)))
+               if (copy_to_user(argp, &range, sizeof(range)))
                        status = -EFAULT;
        }