From a81fdf3b3ffb2eef80c03d26b67fd00401ea1cc0 Mon Sep 17 00:00:00 2001
From: Packit Service <user-cont-team+packit-service@redhat.com>
Date: Dec 15 2020 17:41:01 +0000
Subject: Apply patch 0002-xtables-restore-Fix-parser-feed-from-line-buffer.patch


patch_name: 0002-xtables-restore-Fix-parser-feed-from-line-buffer.patch
present_in_specfile: true
location_in_specfile: 2

---

diff --git a/iptables/tests/shell/testcases/ipt-restore/0010-noflush-new-chain_0 b/iptables/tests/shell/testcases/ipt-restore/0010-noflush-new-chain_0
new file mode 100755
index 0000000..739e684
--- /dev/null
+++ b/iptables/tests/shell/testcases/ipt-restore/0010-noflush-new-chain_0
@@ -0,0 +1,10 @@
+#!/bin/sh -e
+
+# assert input feed from buffer doesn't trip over
+# added nul-chars from parsing chain line.
+
+$XT_MULTI iptables-restore --noflush <<EOF
+*filter
+:foobar - [0:0]
+-A foobar -j ACCEPT
+COMMIT
diff --git a/iptables/xtables-restore.c b/iptables/xtables-restore.c
index 2f0fe7d..dd907e0 100644
--- a/iptables/xtables-restore.c
+++ b/iptables/xtables-restore.c
@@ -327,10 +327,12 @@ void xtables_restore_parse(struct nft_handle *h,
 	line = 0;
 	ptr = preload_buffer;
 	while (*ptr) {
+		size_t len = strlen(ptr);
+
 		h->error.lineno = ++line;
 		DEBUGP("%s: buffered line %d: '%s'\n", __func__, line, ptr);
 		xtables_restore_parse_line(h, p, &state, ptr);
-		ptr += strlen(ptr) + 1;
+		ptr += len + 1;
 	}
 	if (*buffer) {
 		h->error.lineno = ++line;