linux-kernel - [PATCH] fs/notify/inotify: decrement user inotify count on close

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Message-Id: <1246510598-6136-1-git-send-email-keithp@keithp.com>
Date:	Wed,  1 Jul 2009 21:56:38 -0700
From:	Keith Packard <keithp@...thp.com>
To:	linux-kernel@...r.kernel.org
Cc:	john@...nmccutchan.com, rlove@...ve.org, eparis@...isplace.org,
	Keith Packard <keithp@...thp.com>
Subject: [PATCH] fs/notify/inotify: decrement user inotify count on close

The per-user inotify_devs value is incremented each time a new file is
allocated, but never decremented. This led to inotify_init failing after a
limited number of calls.

Signed-off-by: Keith Packard <keithp@...thp.com>
---
 fs/notify/inotify/inotify_user.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index ff231ad..ff27a29 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -296,12 +296,15 @@ static int inotify_fasync(int fd, struct file *file, int on)
 static int inotify_release(struct inode *ignored, struct file *file)
 {
 	struct fsnotify_group *group = file->private_data;
+	struct user_struct *user = group->inotify_data.user;
 
 	fsnotify_clear_marks_by_group(group);
 
 	/* free this group, matching get was inotify_init->fsnotify_obtain_group */
 	fsnotify_put_group(group);
 
+	atomic_dec(&user->inotify_devs);
+
 	return 0;
 }
 
-- 
1.6.3.1

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