linux-kernel - Re: [RFC][PATCH] debugfs: Fix corrupted loop in debugfs_remove

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Message-ID: <20140610093357.7ef3792b@gandalf.local.home>
Date:	Tue, 10 Jun 2014 09:33:57 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Al Viro <viro@...IV.linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, linux-fsdevel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC][PATCH] debugfs: Fix corrupted loop in
 debugfs_remove_recursive

On Mon, 9 Jun 2014 14:06:07 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> [ I'm currently running my tests on it now, and so far, after a few
>  hours it has yet to blow up. I'll run it for 24 hours which it never
>  succeeded in the past. ]

I ran with this patch on three boxes all night, one for 24 hours. No
problems. I stopped the tests, removed the patch, ran the test on the
same boxes and they all crashed within an hour.

This patch definitely fixes the bug.

The test I ran was:

while :; do
 ./ftrace-test-mkinstances || break
 ./ftrace-test-mkinstances-2 || break
done

Note, the tests expect debugfs to be mounted at /debug.

-- Steve

Download attachment "ftrace-test-mkinstances" of type "application/octet-stream" (1092 bytes)

Download attachment "ftrace-test-mkinstances-2" of type "application/octet-stream" (767 bytes)