From: David Windsor <dwindsor@gmail.com>
To: linux-nfs@vger.kernel.org, netdev@vger.kernel.org
Cc: kernel-hardening@lists.openwall.com, bfields@fieldses.org,
jlayton@poochiereds.net, keescook@chromium.org,
elena.reshetova@intel.com, dwindsor@gmail.com
Subject: [RFC][PATCH] nfsd: add +1 to reference counting scheme for struct nfsd4_session
Date: Thu, 9 Feb 2017 02:38:21 -0500 [thread overview]
Message-ID: <1486625901-10094-1-git-send-email-dwindsor@gmail.com> (raw)
In furtherance of the KSPP effort to add overflow protection to kernel
reference counters, a new type (refcount_t) and API have been created.
Part of the refcount_t API is refcount_inc(), which will not increment a
refcount_t variable if its value is 0 (as this would indicate a possible
use-after-free condition).
In auditing the kernel for refcounting corner cases, we've come across the
case of struct nfsd4_session.
next reply other threads:[~2017-02-11 6:23 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-09 7:38 David Windsor [this message]
2017-02-11 6:42 ` [RFC][PATCH] nfsd: add +1 to reference counting scheme for struct nfsd4_session David Windsor
2017-02-11 12:31 ` Jeff Layton
2017-02-11 14:01 ` David Windsor
2017-02-11 14:09 ` Jeff Layton
2017-02-13 10:38 ` Christoph Hellwig
2017-02-13 11:42 ` David Windsor
2017-02-13 12:12 ` Christoph Hellwig
2017-02-14 13:48 ` David Windsor
2017-02-12 1:15 ` Bruce Fields
2017-02-12 1:42 ` David Windsor
2017-02-13 10:54 ` [kernel-hardening] " Hans Liljestrand
2017-02-13 11:46 ` David Windsor
2017-02-15 16:45 ` Bruce Fields
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