fib_trie: remove potential out of bound access
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 82cfbb00 ("[IPV4] fib_trie: iterator recode") [1] : https://code.google.com/p/address-sanitizer/wiki/AddressSanitizerForKernelReported-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>
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