iptables/0001-ebtables-Exit-gracefully-on-invalid-table-names.patch
Phil Sutter 4a68e9f94a iptables-1.8.7-11.el9
- Fix License name in spec file
- Eliminate inet_aton() and inet_ntoa()
- nft-arp: Make use of ipv4_addr_to_string()
- Make legacy sub-packages obsolete older non-legacy ones
- Fix dates in changelog
- iptables.init: Fix functionality for iptables-nft
- iptables.init: Ignore sysctl files not suffixed '.conf'
- iptables.init: Drop unused NEW_MODUTILS check
- iptables.init: Drop some trailing whitespace

Resolves: RHBZ#1954581, RHBZ#1958262
2021-05-12 12:13:44 +02:00

52 lines
1.7 KiB
Diff

From cf2d347fe9cc384d4453a2a379e0dde8b97d081f Mon Sep 17 00:00:00 2001
From: Phil Sutter <phil@nwl.cc>
Date: Thu, 28 Jan 2021 01:09:56 +0100
Subject: [PATCH] ebtables: Exit gracefully on invalid table names
Users are able to cause program abort by passing a table name that
doesn't exist:
| # ebtables-nft -t dummy -P INPUT ACCEPT
| ebtables: nft-cache.c:455: fetch_chain_cache: Assertion `t' failed.
| Aborted
Avoid this by checking table existence just like iptables-nft does upon
parsing '-t' optarg. Since the list of tables is known and fixed,
checking the given name's length is pointless. So just drop that check
in return.
With this patch in place, output looks much better:
| # ebtables-nft -t dummy -P INPUT ACCEPT
| ebtables v1.8.7 (nf_tables): table 'dummy' does not exist
| Perhaps iptables or your kernel needs to be upgraded.
Signed-off-by: Phil Sutter <phil@nwl.cc>
(cherry picked from commit 30c1d443896311e69762d6b51b63908ec602574f)
---
iptables/xtables-eb.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/iptables/xtables-eb.c b/iptables/xtables-eb.c
index cfa9317c78e94..5bb34d6d292a9 100644
--- a/iptables/xtables-eb.c
+++ b/iptables/xtables-eb.c
@@ -914,10 +914,10 @@ print_zero:
xtables_error(PARAMETER_PROBLEM,
"The -t option (seen in line %u) cannot be used in %s.\n",
line, xt_params->program_name);
- if (strlen(optarg) > EBT_TABLE_MAXNAMELEN - 1)
- xtables_error(PARAMETER_PROBLEM,
- "Table name length cannot exceed %d characters",
- EBT_TABLE_MAXNAMELEN - 1);
+ if (!nft_table_builtin_find(h, optarg))
+ xtables_error(VERSION_PROBLEM,
+ "table '%s' does not exist",
+ optarg);
*table = optarg;
table_set = true;
break;
--
2.31.1