From 7840b9224d5b84c41a8f5a5ddd919c7f7614901f Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Tue, 28 Jul 2020 19:32:44 +0200 Subject: evaluate: remove table from cache on delete table The following ruleset crashes nft if loaded twice, via nft -ef: add table inet filter delete table inet filter table inet filter { chain input { type filter hook input priority filter; policy drop; iifname { "eth0" } counter accept } } If the table contains anonymous sets, such as __set0, then delete + add table might result in nft reusing the existing stale __set0 in the cache. The problem is that nft gets confused and it reuses the existing stale __set0 instead of the new anonymous set __set0 with the same name. Signed-off-by: Pablo Neira Ayuso --- tests/shell/testcases/sets/0053echo_0 | 16 ++++++++++++++++ tests/shell/testcases/sets/dumps/0053echo_0.nft | 6 ++++++ 2 files changed, 22 insertions(+) create mode 100755 tests/shell/testcases/sets/0053echo_0 create mode 100644 tests/shell/testcases/sets/dumps/0053echo_0.nft (limited to 'tests') diff --git a/tests/shell/testcases/sets/0053echo_0 b/tests/shell/testcases/sets/0053echo_0 new file mode 100755 index 00000000..6bb03c28 --- /dev/null +++ b/tests/shell/testcases/sets/0053echo_0 @@ -0,0 +1,16 @@ +#!/bin/bash + +set -e + +EXPECTED="add table inet filter +delete table inet filter + +table inet filter { + chain input { + type filter hook input priority filter; policy drop; + iifname { lo } ip saddr { 10.0.0.0/8 } ip daddr { 192.168.100.62 } tcp dport { 2001 } counter accept + } +} +" + +$NFT -ef - <<< "$EXPECTED" diff --git a/tests/shell/testcases/sets/dumps/0053echo_0.nft b/tests/shell/testcases/sets/dumps/0053echo_0.nft new file mode 100644 index 00000000..6a816636 --- /dev/null +++ b/tests/shell/testcases/sets/dumps/0053echo_0.nft @@ -0,0 +1,6 @@ +table inet filter { + chain input { + type filter hook input priority filter; policy drop; + iifname { "lo" } ip saddr { 10.0.0.0/8 } ip daddr { 192.168.100.62 } tcp dport { 2001 } counter packets 0 bytes 0 accept + } +} -- cgit v1.2.3