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netfilter: nf_tables: fix chain filter in nf_tables_dump_rules()

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[ Upstream commit 24c0df82ef7919e4d10cf2e4e65d368eb2e8ea21 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pablo Neira Ayuso 2017-12-19 12:01:21 +01:00 committed by Greg Kroah-Hartman
parent def8d0ae4a
commit e2f52fa3f8
1 changed files with 1 additions and 1 deletions
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2
net/netfilter/nf_tables_api.c
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@ -2072,7 +2072,7 @@ static int nf_tables_dump_rules(struct sk_buff *skb,
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;