From: Florian Westphal <fw@strlen.de>
Date: Tue, 14 Mar 2023 21:36:50 +0000 (+0100)
Subject: xtables-eb: fix crash when opts isn't reallocated
X-Git-Tag: v1.8.10~72
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e900d40afdb731d2270a5110833ae49192974355;p=thirdparty%2Fiptables.git

xtables-eb: fix crash when opts isn't reallocated

opts may point to statically allocated memory.
This fixes abort() from libc.

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

diff --git a/iptables/xtables-eb.c b/iptables/xtables-eb.c
index 3a73e797..068dffd2 100644
--- a/iptables/xtables-eb.c
+++ b/iptables/xtables-eb.c
@@ -675,7 +675,8 @@ void nft_fini_eb(struct nft_handle *h)
 		free(target->t);
 	}
 
-	free(opts);
+	if (opts != ebt_original_options)
+		free(opts);
 
 	nft_fini(h);
 	xtables_fini();