netdev - [PATCH v4 0/3] kernel/notifier.c: intercepting duplicate registrations to avoid infinite loops

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Date:   Thu, 19 Sep 2019 10:58:05 +0800
From:   Xiaoming Ni <nixiaoming@...wei.com>
To:     <gregkh@...uxfoundation.org>, <akpm@...ux-foundation.org>,
        <vvs@...tuozzo.com>, <torvalds@...ux-foundation.org>,
        <adobriyan@...il.com>, <anna.schumaker@...app.com>,
        <arjan@...ux.intel.com>, <bfields@...ldses.org>,
        <chuck.lever@...cle.com>, <davem@...emloft.net>,
        <jlayton@...nel.org>, <luto@...nel.org>, <mingo@...nel.org>,
        <Nadia.Derbey@...l.net>, <paulmck@...ux.vnet.ibm.com>,
        <semen.protsenko@...aro.org>, <stern@...land.harvard.edu>,
        <tglx@...utronix.de>, <trond.myklebust@...merspace.com>,
        <viresh.kumar@...aro.org>
CC:     <stable@...nel.org>, <dylix.dailei@...wei.com>,
        <nixiaoming@...wei.com>, <yuehaibing@...wei.com>,
        <linux-kernel@...r.kernel.org>, <linux-nfs@...r.kernel.org>,
        <netdev@...r.kernel.org>
Subject: [PATCH v4 0/3] kernel/notifier.c: intercepting duplicate registrations to avoid infinite loops

Registering the same notifier to a hook repeatedly can cause the hook
list to form a ring or lose other members of the list.
so, need add a check in in notifier_chain_register(),
intercepting duplicate registrations to avoid infinite loops


v1:
* use notifier_chain_cond_register replace notifier_chain_register

v2:
* Add a check in notifier_chain_register() to avoid duplicate registration
* remove notifier_chain_cond_register() to avoid duplicate code 
* remove blocking_notifier_chain_cond_register() to avoid duplicate code

v3:
* Add a cover letter.

v4:
* Add Reviewed-by and adjust the title.

Xiaoming Ni (3):
  kernel/notifier.c: intercepting duplicate registrations to avoid
    infinite loops
  kernel/notifier.c: remove notifier_chain_cond_register()
  kernel/notifier.c: remove blocking_notifier_chain_cond_register()

 include/linux/notifier.h |  4 ----
 kernel/notifier.c        | 41 +++--------------------------------------
 net/sunrpc/rpc_pipe.c    |  2 +-
 3 files changed, 4 insertions(+), 43 deletions(-)

-- 
1.8.5.6