@@ -4172,6 +4172,18 @@ static int cmd_evaluate_add(struct eval_ctx *ctx, struct cmd *cmd)
}
}
+static void table_del_cache(struct eval_ctx *ctx, struct cmd *cmd)
+{
+ struct table *table;
+
+ table = table_lookup(&cmd->handle, &ctx->nft->cache);
+ if (!table)
+ return;
+
+ list_del(&table->list);
+ table_free(table);
+}
+
static int cmd_evaluate_delete(struct eval_ctx *ctx, struct cmd *cmd)
{
switch (cmd->obj) {
@@ -4180,7 +4192,10 @@ static int cmd_evaluate_delete(struct eval_ctx *ctx, struct cmd *cmd)
case CMD_OBJ_SET:
case CMD_OBJ_RULE:
case CMD_OBJ_CHAIN:
+ return 0;
case CMD_OBJ_TABLE:
+ table_del_cache(ctx, cmd);
+ return 0;
case CMD_OBJ_FLOWTABLE:
case CMD_OBJ_COUNTER:
case CMD_OBJ_QUOTA:
new file mode 100755
@@ -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"
new file mode 100644
@@ -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
+ }
+}
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 <pablo@netfilter.org> --- src/evaluate.c | 15 +++++++++++++++ tests/shell/testcases/sets/0053echo_0 | 16 ++++++++++++++++ tests/shell/testcases/sets/dumps/0053echo_0.nft | 6 ++++++ 3 files changed, 37 insertions(+) create mode 100755 tests/shell/testcases/sets/0053echo_0 create mode 100644 tests/shell/testcases/sets/dumps/0053echo_0.nft