From: Oleg Nesterov <oleg@redhat.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Al Viro <viro@zeniv.linux.org.uk>,
Alexander Z Lam <azl@google.com>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
David Sharp <dhsharp@google.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
Vaibhav Nagarnaik <vnagarnaik@google.com>,
"zhangwei(Jovi)" <jovi.zhangwei@huawei.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/1] debugfs: debugfs_remove_recursive() must not rely on list_empty(d_subdirs)
Date: Fri, 26 Jul 2013 17:14:32 +0200 [thread overview]
Message-ID: <20130726151432.GD19472@redhat.com> (raw)
In-Reply-To: <20130726151224.GB19472@redhat.com>
Argh, sorry for noise.
Please ignore the extra email with the wrong subject.
On 07/26, Oleg Nesterov wrote:
>
> debugfs_remove_recursive() is wrong,
>
> 1. it wrongly assumes that !list_empty(d_subdirs) means that this
> dir should be removed.
>
> This is not that bad by itself, but:
>
> 2. if d_subdirs does not becomes empty after __debugfs_remove()
> it gives up and silently fails, it doesn't even try to remove
> other entries.
>
> However ->d_subdirs can be non-empty because it still has the
> already deleted !debugfs_positive() entries.
>
next prev parent reply other threads:[~2013-07-26 15:19 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-23 20:58 [PATCH 0/6] tracing: open/delete fixes Oleg Nesterov
2013-07-23 20:59 ` [PATCH 1/6] tracing: Turn event/id->i_private into call->event.type Oleg Nesterov
2013-07-24 20:13 ` Steven Rostedt
2013-07-25 14:26 ` Oleg Nesterov
2013-07-23 20:59 ` [PATCH 2/6] tracing: Change event_enable/disable_read() to verify i_private != NULL Oleg Nesterov
2013-07-24 19:37 ` Steven Rostedt
2013-07-23 20:59 ` [PATCH 3/6] tracing: Change event_filter_read/write " Oleg Nesterov
2013-07-24 19:52 ` Steven Rostedt
2013-07-23 20:59 ` [PATCH 4/6] tracing: Change f_start() to take event_mutex and " Oleg Nesterov
2013-07-23 20:59 ` [PATCH 5/6] tracing: Introduce remove_event_file_dir() Oleg Nesterov
2013-07-24 20:01 ` Steven Rostedt
2013-07-23 20:59 ` [PATCH 6/6] tracing: Change remove_event_file_dir() to clear "d_subdirs"->i_private Oleg Nesterov
2013-07-24 20:08 ` Steven Rostedt
2013-07-25 14:18 ` Oleg Nesterov
2013-07-24 18:46 ` [PATCH 0/6] tracing: open/delete fixes Oleg Nesterov
2013-07-25 16:56 ` Oleg Nesterov
2013-07-25 19:27 ` PATCH? debugfs_remove_recursive() must not rely on list_empty(d_subdirs) Oleg Nesterov
2013-07-25 20:04 ` Oleg Nesterov
2013-07-25 23:43 ` Greg Kroah-Hartman
2013-07-26 15:11 ` [PATCH 0/1] debugfs: " Oleg Nesterov
2013-07-26 15:12 ` Oleg Nesterov
2013-07-26 15:14 ` Oleg Nesterov [this message]
2013-07-26 15:12 ` [PATCH 1/1] " Oleg Nesterov
2013-07-26 17:38 ` Greg Kroah-Hartman
2013-07-26 18:40 ` Steven Rostedt
2013-07-26 15:30 ` [PATCH 0/1] " Steven Rostedt
2013-07-26 16:28 ` Greg Kroah-Hartman
2013-07-26 17:38 ` Greg Kroah-Hartman
2013-07-26 10:24 ` Re: PATCH? " Masami Hiramatsu
2013-07-26 14:49 ` Oleg Nesterov
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