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From: Alexander Aring <aar@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Alexander Aring <aar@pengutronix.de>
Subject: [PATCH 2/2] ifup: fix handling when ip env is not given
Date: Tue, 14 Jun 2016 08:55:06 +0200	[thread overview]
Message-ID: <20160614065506.25821-2-aar@pengutronix.de> (raw)
In-Reply-To: <20160614065506.25821-1-aar@pengutronix.de>

This patch handles the ip env to "" if no ip env is given. Otherwise
we get a NULL pointer derefence.

Signed-off-by: Alexander Aring <aar@pengutronix.de>
---
 net/ifup.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ifup.c b/net/ifup.c
index 17e1b2f..59df069 100644
--- a/net/ifup.c
+++ b/net/ifup.c
@@ -94,6 +94,9 @@ int ifup(const char *name, unsigned flags)
 		goto out;
 
 	ip = getenv("ip");
+	if (!ip)
+		ip = "";
+
 	if (!strcmp(ip, "dhcp")) {
 		ret = run_command("dhcp");
 		if (ret)
-- 
2.8.3


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  reply	other threads:[~2016-06-14  6:55 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-14  6:55 [PATCH 1/2] ifup: remove deletion of ip env Alexander Aring
2016-06-14  6:55 ` Alexander Aring [this message]
2016-06-15  5:43   ` [PATCH 2/2] ifup: fix handling when ip env is not given Sascha Hauer
2016-06-15  5:40 ` [PATCH 1/2] ifup: remove deletion of ip env Sascha Hauer

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