From 73590d9573148804034a88ceb2f6b7ca1545561f Mon Sep 17 00:00:00 2001
From: Paul Blakey <paulb@nvidia.com>
Date: Sun, 5 Dec 2021 15:20:25 +0200
Subject: [PATCH] tc: flower: Fix buffer overflow on large labels

Buffer is 64bytes, but label printing can take 66bytes printing
in hex, and will overflow when setting the string delimiter ('\0').

Fix that by increasing the print buffer size.

Example of overflowing ct_label:
ct_label 11111111111111111111111111111111/11111111111111111111111111111111

Fixes: 2fffb1c03056 ("tc: flower: Add matching on conntrack info")
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Conflict: NA
Reference: https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit?id=73590d95731
---
 tc/f_flower.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tc/f_flower.c b/tc/f_flower.c
index 7f78195f..6d70b92a 100644
--- a/tc/f_flower.c
+++ b/tc/f_flower.c
@@ -2195,7 +2195,7 @@ static void flower_print_ct_label(struct rtattr *attr,
 	const unsigned char *str;
 	bool print_mask = false;
 	int data_len, i;
-	SPRINT_BUF(out);
+	char out[128];
 	char *p;
 
 	if (!attr)
-- 
2.23.0