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netfilter: Fix potential crash in nft_hash walker

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When we get back an EAGAIN from rhashtable_walk_next we were
treating it as a valid object which obviously doesn't work too
well.

Luckily this is hard to trigger so it seems nobody has run into
it yet.

This patch fixes it by redoing the next call when we get an EAGAIN.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Herbert Xu 2015-03-13 10:52:14 +11:00 committed by Pablo Neira Ayuso
parent 78146572b9
commit d8bdff59ce
1 changed files with 2 additions and 0 deletions
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net/netfilter/nft_hash.c
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@ -153,6 +153,8 @@ static void nft_hash_walk(const struct nft_ctx *ctx, const struct nft_set *set,
iter->err = err;
goto out;
}
continue;
}
if (iter->count < iter->skip)