iptables/SOURCES/0109-nft-Fix-for-comparing-...

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From 169d4dd39aeeb9108810e95b6eb176b50701ff7e Mon Sep 17 00:00:00 2001
From: Phil Sutter <phil@nwl.cc>
Date: Thu, 1 Dec 2022 13:09:48 +0100
Subject: [PATCH] nft: Fix for comparing ifname matches against nft-generated
ones
Since nft adds the interface name as fixed-size string of 16 bytes,
filling a mask based on the length value will not match the mask nft
set.
Fixes: 652b98e793711 ("xtables-compat: fix wildcard detection")
Signed-off-by: Phil Sutter <phil@nwl.cc>
(cherry picked from commit f200aca7ff7b6a0edbe9024f0543b3f58111c50e)
---
iptables/nft-shared.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/iptables/nft-shared.c b/iptables/nft-shared.c
index 075ad620250dc..14b04b24085a0 100644
--- a/iptables/nft-shared.c
+++ b/iptables/nft-shared.c
@@ -243,7 +243,7 @@ static void parse_ifname(const char *name, unsigned int len, char *dst, unsigned
memcpy(dst, name, len);
if (name[len - 1] == '\0') {
if (mask)
- memset(mask, 0xff, len);
+ memset(mask, 0xff, strlen(name) + 1);
return;
}
--
2.40.0