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From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Tue, 19 Dec 2017 12:01:21 +0100
Subject: [PATCH] netfilter: nf_tables: fix chain filter in
nf_tables_dump_rules()
ctx->chain may be null now that we have very large object names,
so we cannot check for ctx->chain[0] here.
Fixes: b7263e071aba7 ("netfilter: nf_tables: Allow table names of up to 255 chars")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Phil Sutter <phil@nwl.cc>
---
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2090,7 +2090,7 @@ static int nf_tables_dump_rules(struct s
continue;
list_for_each_entry_rcu(chain, &table->chains, list) {
- if (ctx && ctx->chain[0] &&
+ if (ctx && ctx->chain &&
strcmp(ctx->chain, chain->name) != 0)
continue;
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