netdev - [PATCH v2 net-next 0/3] net: device tracking improvements

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Date:   Fri,  4 Feb 2022 14:42:34 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH v2 net-next 0/3] net: device tracking improvements

From: Eric Dumazet <edumazet@...gle.com>

Main goal of this series is to be able to detect the following case
which apparently is still haunting us.

dev_hold_track(dev, tracker_1, GFP_ATOMIC);
    dev_hold(dev);
    dev_put(dev);
    dev_put(dev);              // Should complain loudly here.
dev_put_track(dev, tracker_1); // instead of here (as before this series)


v2: third patch:
  I replaced the dev_put() in linkwatch_do_dev() with __dev_put().

Eric Dumazet (3):
  ref_tracker: implement use-after-free detection
  ref_tracker: add a count of untracked references
  net: refine dev_put()/dev_hold() debugging

 include/linux/netdevice.h   | 69 ++++++++++++++++++++++++-------------
 include/linux/ref_tracker.h |  4 +++
 lib/ref_tracker.c           | 17 ++++++++-
 net/core/dev.c              |  2 +-
 net/core/link_watch.c       |  6 ++--
 5 files changed, 70 insertions(+), 28 deletions(-)

-- 
2.35.0.263.gb82422642f-goog