From: Darron Broad <darron@kewl.org>
Date: Fri, 3 Oct 2008 14:50:00 +0000 (-0300)
Subject: V4L/DVB (9171): S2API: Stop an OOPS if illegal commands are dumped in S2API.
X-Git-Tag: firefly_0821_release~17709^2~15
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4aae8efb4908fa3f80dc1177d093443bc09adf5f;p=firefly-linux-kernel-4.4.55.git

V4L/DVB (9171): S2API: Stop an OOPS if illegal commands are dumped in S2API.

Quick fix to stop an OOPS if illegal commands are dumped in S2API.

Signed-off-by: Darron Broad <darron@kewl.org>
Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c
index 4c3f0d7e355c..f44b64b8e614 100644
--- a/drivers/media/dvb/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb/dvb-core/dvb_frontend.c
@@ -848,6 +848,13 @@ void dtv_property_dump(struct dtv_property *tvp)
 {
 	int i;
 
+	if( (tvp->cmd <= 0 || tvp->cmd > DTV_DELIVERY_SYSTEM) &&
+			tvp->cmd != DTV_API_VERSION) {
+		printk("%s: tvp.cmd = 0x%08x (undefined/unknown/invalid)\n",
+			__func__, tvp->cmd);
+		return;
+	}
+
 	printk("%s() tvp.cmd    = 0x%08x (%s)\n"
 		,__FUNCTION__
 		,tvp->cmd