linux-kernel - [PATCH v2] Off-by-one in /sys/module/*/refcnt

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Message-ID: <20070806194745.GB5842@martell.zuzino.mipt.ru>
Date:	Mon, 6 Aug 2007 23:47:45 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Tejun Heo <htejun@...il.com>
Cc:	Kay Sievers <kay.sievers@...y.org>, akpm@...l.org, gregkh@...e.de,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] Off-by-one in /sys/module/*/refcnt

sysfs internals were changed to not pin module in question.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 kernel/module.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/kernel/module.c
+++ b/kernel/module.c
@@ -784,8 +784,7 @@ EXPORT_SYMBOL_GPL(symbol_put_addr);
 static ssize_t show_refcnt(struct module_attribute *mattr,
 			   struct module *mod, char *buffer)
 {
-	/* sysfs holds a reference */
-	return sprintf(buffer, "%u\n", module_refcount(mod)-1);
+	return sprintf(buffer, "%u\n", module_refcount(mod));
 }
 
 static struct module_attribute refcnt = {

-
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