From 82f4adf7dc43f9d63de11ff5e5765871b09b545f Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Fri, 17 Jul 2026 11:10:44 +0200
Subject: [PATCH] parser_bison: fix UaF when reporting table parse error

JIRA: https://issues.redhat.com/browse/RHEL-190549
Upstream Status: nftables commit 3ba0e5af6b5da9dfff5273bc1f0f15a60a9fe33b
Conflicts: Changes in removed code due to previous backports

commit 3ba0e5af6b5da9dfff5273bc1f0f15a60a9fe33b
Author: Florian Westphal <fw@strlen.de>
Date:   Tue Jan 7 23:55:06 2025 +0100

    parser_bison: fix UaF when reporting table parse error

    It passed already-freed memory to erec function.  Found with afl++ and asan.

    Fixes: 4955ae1a81b7 ("Add support for table's persist flag")
    Signed-off-by: Florian Westphal <fw@strlen.de>
    Reviewed-by: Pablo Neira Ayuso <pablo@netfilter.org>

Signed-off-by: Phil Sutter <psutter@redhat.com>
---
 src/parser_bison.y | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/parser_bison.y b/src/parser_bison.y
index 9bfd464..fb91c3e 100644
--- a/src/parser_bison.y
+++ b/src/parser_bison.y
@@ -1939,12 +1939,14 @@ table_flags		:	table_flag
 table_flag		:	STRING
 			{
 				$$ = parse_table_flag($1);
-				xfree($1);
 				if ($$ == 0) {
 					erec_queue(error(&@1, "unknown table option %s", $1),
 						   state->msgs);
+					free_const($1);
 					YYERROR;
 				}
+
+				free_const($1);
 			}
 			;