From d8ab1aa427244ab260c9620c9f02516fe3d1da3d Mon Sep 17 00:00:00 2001
From: Dimitri Papadopoulos
 <3234522+DimitriPapadopoulos@users.noreply.github.com>
Date: Thu, 28 Dec 2023 13:53:02 +0100
Subject: [PATCH] Address integer overflow reported by a code analyser

The output of /usr/sbin/netstat would have to be larger than
2 GB for this to be a menace. Because this seems quite improbable,
address with an assert() for now.
---
 src/ipv4.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/ipv4.c b/src/ipv4.c
index 698bf108..46bfda6d 100644
--- a/src/ipv4.c
+++ b/src/ipv4.c
@@ -232,6 +232,7 @@ static int ipv4_get_route(struct rtentry *route)
 	while (fgets(line, buffer_size - total_bytes_read - 1, fp) != NULL) {
 		uint32_t bytes_read = strlen(line);
 
+		assert(total_bytes_read < UINT32_MAX - bytes_read);
 		total_bytes_read += bytes_read;
 
 		if (bytes_read > 0 && line[bytes_read - 1] != '\n') {