From: Yuejie Shi <syjcnss@gmail.com>
Date: Fri, 31 Mar 2017 07:10:20 +0000 (+0800)
Subject: af_key: Add lock to key dump
X-Git-Tag: v3.2.91~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=02085b1734f1bdc3ad5d7159c6a115be207946e5;p=pandora-kernel.git

af_key: Add lock to key dump

commit 89e357d83c06b6fac581c3ca7f0ee3ae7e67109e upstream.

A dump may come in the middle of another dump, modifying its dump
structure members. This race condition will result in NULL pointer
dereference in kernel. So add a lock to prevent that race.

Fixes: 83321d6b9872 ("[AF_KEY]: Dump SA/SP entries non-atomically")
Signed-off-by: Yuejie Shi <syjcnss@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
[bwh: Backported to 3.2:
 - pfkey_dump() doesn't support filters
 - Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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