From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753436Ab2IYHC6 (ORCPT ); Tue, 25 Sep 2012 03:02:58 -0400 Received: from acsinet15.oracle.com ([141.146.126.227]:20436 "EHLO acsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752857Ab2IYHCz (ORCPT ); Tue, 25 Sep 2012 03:02:55 -0400 Date: Tue, 25 Sep 2012 10:02:51 +0300 From: Dan Carpenter To: Ohad Ben-Cohen Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [patch 2/3] remoteproc: snprintf() can return more than was printed Message-ID: <20120925070251.GC23009@elgon.mountain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-Source-IP: ucsinet22.oracle.com [156.151.31.94] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org snprintf() returns the number of characters which would have been printed if there were enough space. For example, on the first print if we fill up the 28 character string then it would return a number more than 30. Use scnprintf() instead because that returns the actual number of characters printed. Signed-off-by: Dan Carpenter diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c index 10a3825..ea90a56 100644 --- a/drivers/remoteproc/remoteproc_debugfs.c +++ b/drivers/remoteproc/remoteproc_debugfs.c @@ -82,7 +82,7 @@ static ssize_t rproc_state_read(struct file *filp, char __user *userbuf, state = rproc->state > RPROC_LAST ? RPROC_LAST : rproc->state; - i = snprintf(buf, 30, "%.28s (%d)\n", rproc_state_string[state], + i = scnprintf(buf, 30, "%.28s (%d)\n", rproc_state_string[state], rproc->state); return simple_read_from_buffer(userbuf, count, ppos, buf, i); @@ -103,7 +103,7 @@ static ssize_t rproc_name_read(struct file *filp, char __user *userbuf, char buf[100]; int i; - i = snprintf(buf, sizeof(buf), "%.98s\n", rproc->name); + i = scnprintf(buf, sizeof(buf), "%.98s\n", rproc->name); return simple_read_from_buffer(userbuf, count, ppos, buf, i); }