From: Amy Griffis <amy.griffis@hp.com>
Date: Sat, 20 May 2006 22:00:06 +0000 (-0700)
Subject: [PATCH] fix race in inotify_release
X-Git-Tag: v2.6.17-rc5~62
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=66055a4e7334b05354c835123ff621c5f700e56a;p=pandora-kernel.git

[PATCH] fix race in inotify_release

While doing some inotify stress testing, I hit the following race.  In
inotify_release(), it's possible for a watch to be removed from the lists
in between dropping dev->mutex and taking inode->inotify_mutex.  The
reference we hold prevents the watch from being freed, but not from being
removed.

Checking the dev's idr mapping will prevent a double list_del of the
same watch.

Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Acked-by: John McCutchan <john@johnmccutchan.com>
Cc: Robert Love <rml@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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