mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Saravana Kannan <saravanak@google.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
	stable@vger.kernel.org, kernel-team@android.com,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] driver core: Fix locking bug in deferred_probe_timeout_work_func()
Date: Thu, 15 Apr 2021 15:51:08 +0200	[thread overview]
Message-ID: <YHhEzAbT7ovcpDns@kroah.com> (raw)
In-Reply-To: <20210412180907.1980874-1-saravanak@google.com>

On Mon, Apr 12, 2021 at 11:09:06AM -0700, Saravana Kannan wrote:
> commit eed6e41813deb9ee622cd9242341f21430d7789f upstream.
> 
> list_for_each_entry_safe() is only useful if we are deleting nodes in a
> linked list within the loop. It doesn't protect against other threads
> adding/deleting nodes to the list in parallel. We need to grab
> deferred_probe_mutex when traversing the deferred_probe_pending_list.
> 
> Cc: stable@vger.kernel.org
> Fixes: 25b4e70dcce9 ("driver core: allow stopping deferred probe after init")
> Signed-off-by: Saravana Kannan <saravanak@google.com>
> Link: https://lore.kernel.org/r/20210402040342.2944858-2-saravanak@google.com
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
> Hi Greg,
> 
> This should apply cleanly to 4.19 and 5.4 if you think this should be
> picked up.

thanks, now queued up.

greg k-h

      reply	other threads:[~2021-04-15 13:51 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-12 18:09 Saravana Kannan
2021-04-15 13:51 ` Greg Kroah-Hartman [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=YHhEzAbT7ovcpDns@kroah.com \
    --to=gregkh@linuxfoundation.org \
    --cc=kernel-team@android.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=rafael@kernel.org \
    --cc=saravanak@google.com \
    --cc=stable@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®