[patch] copy_to_user check and whitespace cleanups in fs/cifs/file.c

[Jesper Juhl]

Hi,

Patch below adds a check for the copy_to_user return value and makes a few 
whitespace cleanups in  fs/cifs/file.c::cifs_user_read()
I hope bundling two different things together in one patch is OK when the 
change is as small as this, but if you want it spplit in two patches, then 
just say so.


Signed-off-by: Jesper Juhl <juhl-lkml at dif.dk>

diff -up linux-2.6.10-orig/fs/cifs/file.c linux-2.6.10/fs/cifs/file.c
--- linux-2.6.10-orig/fs/cifs/file.c	2004-12-24 22:33:48.000000000 +0100
+++ linux-2.6.10/fs/cifs/file.c	2004-12-27 00:18:35.000000000 +0100
@@ -1141,20 +1141,21 @@ cifs_user_read(struct file * file, char 
 	}
 	open_file = (struct cifsFileInfo *)file->private_data;
 
-	if((file->f_flags & O_ACCMODE) == O_WRONLY) {
-		cFYI(1,("attempting read on write only file instance"));
+	if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
+		cFYI(1, ("attempting read on write only file instance"));
 	}
 
-	for (total_read = 0,current_offset=read_data; read_size > total_read;
-				total_read += bytes_read,current_offset+=bytes_read) {
-		current_read_size = min_t(const int,read_size - total_read,cifs_sb->rsize);
+	for (total_read = 0, current_offset = read_data; read_size > total_read;
+			total_read += bytes_read, current_offset += bytes_read) {
+		current_read_size = min_t(const int, read_size - total_read, 
+			cifs_sb->rsize);
 		rc = -EAGAIN;
 		smb_read_data = NULL;
-		while(rc == -EAGAIN) {
+		while (rc == -EAGAIN) {
 			if ((open_file->invalidHandle) && (!open_file->closePend)) {
 				rc = cifs_reopen_file(file->f_dentry->d_inode,
 					file,TRUE);
-				if(rc != 0)
+				if (rc != 0)
 					break;
 			}
 
@@ -1164,9 +1165,13 @@ cifs_user_read(struct file * file, char 
 				 &bytes_read, &smb_read_data);
 
 			pSMBr = (struct smb_com_read_rsp *)smb_read_data;
-			copy_to_user(current_offset,smb_read_data + 4/* RFC1001 hdr*/
-				+ le16_to_cpu(pSMBr->DataOffset), bytes_read);
-			if(smb_read_data) {
+			if (copy_to_user(current_offset,smb_read_data + 4 /* RFC1001 hdr*/
+					+ le16_to_cpu(pSMBr->DataOffset), bytes_read)) {
+				FreeXid(xid);
+				return -EFAULT;
+			}
+				
+			if (smb_read_data) {
 				cifs_buf_release(smb_read_data);
 				smb_read_data = NULL;
 			}




Please keep me on CC.