From: Dan Carpenter <dan.carpenter@oracle.com>
To: kernel-janitors@vger.kernel.org
Subject: [patch 2/2] Staging: rtl8192e: pointer math bug in rtllib_rx_DELBA()
Date: Fri, 17 Jul 2015 09:24:25 +0000 [thread overview]
Message-ID: <20150717092425.GA3060@mwanda> (raw)
The "delba" variable is a pointer to struct rtllib_hdr_3addr so this
pointer math bug means that we read nonsense data from beyond the end of
the buffer. It could result in a oops if the memory is not mapped.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/staging/rtl8192e/rtl819x_BAProc.c b/drivers/staging/rtl8192e/rtl819x_BAProc.c
index 60f536c..98e6c4e 100644
--- a/drivers/staging/rtl8192e/rtl819x_BAProc.c
+++ b/drivers/staging/rtl8192e/rtl819x_BAProc.c
@@ -453,7 +453,7 @@ int rtllib_rx_DELBA(struct rtllib_device *ieee, struct sk_buff *skb)
#endif
delba = (struct rtllib_hdr_3addr *)skb->data;
dst = (u8 *)(&delba->addr2[0]);
- delba += sizeof(struct rtllib_hdr_3addr);
+ delba++;
pDelBaParamSet = (union delba_param_set *)(delba+2);
pReasonCode = (u16 *)(delba+4);
next reply other threads:[~2015-07-17 9:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-17 9:24 Dan Carpenter [this message]
2015-07-17 20:17 ` [patch 2/2] Staging: rtl8192e: pointer math bug in rtllib_rx_DELBA() Mateusz Kulikowski
2015-07-19 10:52 ` [patch 2/2 v2] " Dan Carpenter
2015-07-19 10:52 ` Dan Carpenter
2015-07-19 18:17 ` Mateusz Kulikowski
2015-07-19 18:17 ` Mateusz Kulikowski
2015-07-18 7:31 ` [patch 2/2] " Dan Carpenter
2015-07-18 8:09 ` Dan Carpenter
2015-07-18 12:32 ` Malcolm Priestley
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