parser_bison: fix memleak in meta set error handling

We must release the expression here, found via afl++ and
-fsanitize-address build.

Signed-off-by: Florian Westphal <fw@strlen.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/tests/shell/testcases/bogons/nft-f/memleak_on_meta_set_errpath b/tests/shell/testcases/bogons/nft-f/memleak_on_meta_set_errpath
new file mode 100644
index 00000000..917e8bf8
--- /dev/null
+++ b/tests/shell/testcases/bogons/nft-f/memleak_on_meta_set_errpath
@@ -0,0 +1,5 @@
+table filter {
+ chain y {
+  meta seccark set ct secmark
+ }
+}