From 92f540141ca5aa1cc5070ea383c2eabf3206b86e Mon Sep 17 00:00:00 2001
From: Phil Sutter <psutter@redhat.com>
Date: Tue, 21 Feb 2023 19:50:41 +0100
Subject: [PATCH] mnl: dump_nf_hooks() leaks memory in error path
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2160049
Upstream Status: nftables commit ef66f321e49b3
commit ef66f321e49b337c7e678bb90d6acb94f331dfc4
Author: Phil Sutter <phil@nwl.cc>
Date: Wed Jan 11 12:28:15 2023 +0100
mnl: dump_nf_hooks() leaks memory in error path
Have to free the basehook object before returning to caller.
Fixes: 4694f7230195b ("src: add support for base hook dumping")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Phil Sutter <psutter@redhat.com>
---
src/mnl.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/src/mnl.c b/src/mnl.c
index 7dd77be..269d3f1 100644
--- a/src/mnl.c
+++ b/src/mnl.c
@@ -2211,16 +2211,23 @@ static int dump_nf_hooks(const struct nlmsghdr *nlh, void *_data)
struct nlattr *nested[NFNLA_HOOK_INFO_MAX + 1] = {};
uint32_t type;
- if (mnl_attr_parse_nested(tb[NFNLA_HOOK_CHAIN_INFO], dump_nf_chain_info_cb, nested) < 0)
+ if (mnl_attr_parse_nested(tb[NFNLA_HOOK_CHAIN_INFO],
+ dump_nf_chain_info_cb, nested) < 0) {
+ basehook_free(hook);
return -1;
+ }
type = ntohl(mnl_attr_get_u32(nested[NFNLA_HOOK_INFO_TYPE]));
if (type == NFNL_HOOK_TYPE_NFTABLES) {
struct nlattr *info[NFNLA_CHAIN_MAX + 1] = {};
const char *tablename, *chainname;
- if (mnl_attr_parse_nested(nested[NFNLA_HOOK_INFO_DESC], dump_nf_attr_chain_cb, info) < 0)
+ if (mnl_attr_parse_nested(nested[NFNLA_HOOK_INFO_DESC],
+ dump_nf_attr_chain_cb,
+ info) < 0) {
+ basehook_free(hook);
return -1;
+ }
tablename = mnl_attr_get_str(info[NFNLA_CHAIN_TABLE]);
chainname = mnl_attr_get_str(info[NFNLA_CHAIN_NAME]);
--
2.39.2