linux-kernel - [ 167/173] staging: vt6656: [BUG] out of bound array reference in RFbSetPower.

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Message-Id: <20121228190402.261165145@decadent.org.uk>
Date:	Fri, 28 Dec 2012 20:06:17 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Malcolm Priestley <tvboxspy@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [ 167/173] staging: vt6656: [BUG] out of bound array reference in RFbSetPower.

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Malcolm Priestley <tvboxspy@...il.com>

commit ab1dd9963137a1e122004d5378a581bf16ae9bc8 upstream.

Calling RFbSetPower with uCH zero value will cause out of bound array reference.

This causes 64 bit kernels to oops on boot.

Note: Driver does not function on 64 bit kernels and should be
blacklisted on them.

Signed-off-by: Malcolm Priestley <tvboxspy@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/staging/vt6656/rf.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/staging/vt6656/rf.c b/drivers/staging/vt6656/rf.c
index 593cdc7..74c0598 100644
--- a/drivers/staging/vt6656/rf.c
+++ b/drivers/staging/vt6656/rf.c
@@ -769,6 +769,9 @@ BYTE    byPwr = pDevice->byCCKPwr;
         return TRUE;
     }
 
+	if (uCH == 0)
+		return -EINVAL;
+
     switch (uRATE) {
     case RATE_1M:
     case RATE_2M:


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