From: Eric Dumazet <edumazet@google.com>
Date: Mon, 5 Aug 2013 18:18:49 +0000 (-0700)
Subject: fib_trie: remove potential out of bound access
X-Git-Tag: v3.2.52~148
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c521d041383bf06b840ee031002cf4d24d7e4673;p=pandora-kernel.git

fib_trie: remove potential out of bound access

[ Upstream commit aab515d7c32a34300312416c50314e755ea6f765 ]

AddressSanitizer [1] dynamic checker pointed a potential
out of bound access in leaf_walk_rcu()

We could allocate one more slot in tnode_new() to leave the prefetch()
in-place but it looks not worth the pain.

Bug added in commit 82cfbb008572b ("[IPV4] fib_trie: iterator recode")

[1] :
https://code.google.com/p/address-sanitizer/wiki/AddressSanitizerForKernel

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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