[PATCH] V9FS: 'names_cache' memory leak

Data allocated with "__getname()" should always be free'd with "__putname()"
because of the AUDITSYSCALL code.

Signed-off-by: Davi Arnaut <davi.arnaut@gmail.com>
Cc: <rminnich@lanl.gov>
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/v9fs.c

@@ -266,7 +266,7 @@ v9fs_session_init(struct v9fs_session_info *v9ses,
 
 	v9ses->remotename = __getname();
 	if (!v9ses->remotename) {
-		putname(v9ses->name);
+		__putname(v9ses->name);
 		return -ENOMEM;
 	}
 
@@ -411,8 +411,8 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
 	if (v9ses->transport)
 		v9ses->transport->close(v9ses->transport);
 
-	putname(v9ses->name);
-	putname(v9ses->remotename);
+	__putname(v9ses->name);
+	__putname(v9ses->remotename);
 }
 
 /**

fs/9p/vfs_inode.c

@@ -1105,7 +1105,7 @@ static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer,
 		}
 	}
 
-	putname(link);
+	__putname(link);
 	return retval;
 }
 
@@ -1129,7 +1129,7 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd)
 		len = v9fs_readlink(dentry, link, strlen(link));
 
 		if (len < 0) {
-			putname(link);
+			__putname(link);
 			link = ERR_PTR(len);
 		} else
 			link[len] = 0;
@@ -1152,7 +1152,7 @@ static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void
 
 	dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s);
 	if (!IS_ERR(s))
-		putname(s);
+		__putname(s);
 }
 
 /**
@@ -1228,7 +1228,7 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir,
       FreeMem:
 	kfree(mistat);
 	kfree(fcall);
-	putname(symname);
+	__putname(symname);
 	return retval;
 }
 
@@ -1319,7 +1319,7 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
       FreeMem:
 	kfree(mistat);
 	kfree(fcall);
-	putname(symname);
+	__putname(symname);
 
 	return retval;
 }