52 lines
1.8 KiB
Diff
52 lines
1.8 KiB
Diff
|
From f4f3fd1fa83a56c051fa72ee619ef23942e65504 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 a3d659fb35e27..6e47feec5132f 100644
|
||
|
|
--- a/iptables/xtables-eb.c
|
||
|
|
+++ b/iptables/xtables-eb.c
|
||
|
|
@@ -957,10 +957,10 @@ int do_commandeb(struct nft_handle *h, int argc, char *argv[], char **table,
|
||
|
|
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;
|
||
|
|
--
|
||
|
|
2.41.0
|
||
|
|
|