[PATCH] v9fs: fix for access to unitialized variables or freed memory

Miscellaneous fixes related to accessing uninitialized variables or memory
that was already freed.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/9p/9p.c

@@ -111,7 +111,6 @@ static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc,
 	if (!rc)
 		return;
 
-	dprintk(DEBUG_9P, "tcall id %d rcall id %d\n", tc->id, rc->id);
 	v9ses = a;
 	if (rc->id == RCLUNK)
 		v9fs_put_idpool(fid, &v9ses->fidpool);

fs/9p/trans_fd.c

@@ -80,6 +80,7 @@ static int v9fs_fd_send(struct v9fs_transport *trans, void *v, int len)
 	if (!trans || trans->status != Connected || !ts)
 		return -EIO;
 
+	oldfs = get_fs();
 	set_fs(get_ds());
 	/* The cast to a user pointer is valid due to the set_fs() */
 	ret = vfs_write(ts->out_file, (void __user *)v, len, &ts->out_file->f_pos);

fs/9p/vfs_inode.c

@@ -265,8 +265,7 @@ v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name,
 	fid = v9fs_get_idpool(&v9ses->fidpool);
 	if (fid < 0) {
 		eprintk(KERN_WARNING, "no free fids available\n");
-		err = -ENOSPC;
-		goto error;
+		return -ENOSPC;
 	}
 
 	err = v9fs_t_walk(v9ses, pfid, fid, NULL, &fcall);
@@ -313,8 +312,7 @@ v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
 	nfid = v9fs_get_idpool(&v9ses->fidpool);
 	if (nfid < 0) {
 		eprintk(KERN_WARNING, "no free fids available\n");
-		err = -ENOSPC;
-		goto error;
+		return ERR_PTR(-ENOSPC);
 	}
 
 	err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
@@ -612,7 +610,7 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
 	int result = 0;
 
 	dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
-		dir, dentry->d_iname, dentry, nameidata);
+		dir, dentry->d_name.name, dentry, nameidata);
 
 	sb = dir->i_sb;
 	v9ses = v9fs_inode2v9ses(dir);

fs/9p/vfs_super.c

@@ -156,7 +156,6 @@ static struct super_block *v9fs_get_sb(struct file_system_type
 	stat_result = v9fs_t_stat(v9ses, newfid, &fcall);
 	if (stat_result < 0) {
 		dprintk(DEBUG_ERROR, "stat error\n");
-		kfree(fcall);
 		v9fs_t_clunk(v9ses, newfid);
 	} else {
 		/* Setup the Root Inode */