From: Florian Forster <octo@verplant.org>
Date: Fri, 3 Apr 2009 13:54:16 +0000 (+0200)
Subject: src/liboping.c: Check if pointer is NULL before dereferencing it in `ping_receive_ipv4'.
X-Git-Tag: liboping-1.1.2~1
X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=7cefcf2bdea30db231ae9508638aeda10640ac2f;p=liboping.git

src/liboping.c: Check if pointer is NULL before dereferencing it in `ping_receive_ipv4'.

Thanks to Tomasz Pala for pointing out the problem.
---

diff --git a/src/liboping.c b/src/liboping.c
index 579aba3..0cff9f4 100644
--- a/src/liboping.c
+++ b/src/liboping.c
@@ -342,8 +342,9 @@ static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffe
 		dprintf ("No match found for ident = 0x%04x, seq = %i\n",
 				ident, seq);
 	}
-	
-	ptr->recv_ttl = ip_hdr->ip_ttl;
+
+	if (ptr != NULL)
+		ptr->recv_ttl = ip_hdr->ip_ttl;
 
 	return (ptr);
 }