On Tue, Feb 13, 2018 at 07:00:21PM -0800, Yonghong Song wrote:
> There is a memory leak happening in lpm_trie map_free callback
> function trie_free. The trie structure itself does not get freed.
>
> Also, trie_free function did not do synchronize_rcu before freeing
> various data structures. This is incorrect as some rcu_read_lock
> region(s) for lookup, update, delete or get_next_key may not complete yet.
> The fix is to add synchronize_rcu in the beginning of trie_free.
> The useless spin_lock is removed from this function as well.
>
> Fixes: b95a5c4db09b ("bpf: add a longest prefix match trie map
> implementation")
> Reported-by: Mathieu Malaterre <[email protected]>
> Reported-by: Alexei Starovoitov <[email protected]>
> Tested-by: Mathieu Malaterre <[email protected]>
> Signed-off-by: Yonghong Song <[email protected]>
> ---
> kernel/bpf/lpm_trie.c | 11 +++++++----
> 1 file changed, 7 insertions(+), 4 deletions(-)
>
> v1->v2:
> Make comments more precise and make label name more appropriate,
> as suggested by Daniel
Applied to bpf tree, Thanks Yonghong.
