From: Dan Carpenter Date: Sun, 19 Jul 2015 10:52:33 +0000 (+0300) Subject: Staging: rtl8192e: pointer math bug in rtllib_rx_DELBA() X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d0dcaa8d4eff40b2999d5265f2218c29e82e24cc;p=openwrt%2Fstaging%2Fblogic.git Staging: rtl8192e: pointer math bug in rtllib_rx_DELBA() The pointer math here was totally wrong so we were reading nonsense information from beyond the end of the buffer. It could lead to an oops if that memory wasn't mapped. The "pReasonCode" pointer is assigned but never used so I deleted it. With-Fix-From: Mateusz Kulikowski Signed-off-by: Dan Carpenter Acked-by: Mateusz Kulikowski Tested-by: Mateusz Kulikowski Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/rtl8192e/rtl819x_BAProc.c b/drivers/staging/rtl8192e/rtl819x_BAProc.c index 60f536c295ab..78ede4a817fc 100644 --- a/drivers/staging/rtl8192e/rtl819x_BAProc.c +++ b/drivers/staging/rtl8192e/rtl819x_BAProc.c @@ -428,7 +428,6 @@ int rtllib_rx_DELBA(struct rtllib_device *ieee, struct sk_buff *skb) { struct rtllib_hdr_3addr *delba = NULL; union delba_param_set *pDelBaParamSet = NULL; - u16 *pReasonCode = NULL; u8 *dst = NULL; if (skb->len < sizeof(struct rtllib_hdr_3addr) + 6) { @@ -453,9 +452,7 @@ 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); - pDelBaParamSet = (union delba_param_set *)(delba+2); - pReasonCode = (u16 *)(delba+4); + pDelBaParamSet = (union delba_param_set *)&delba->payload[2]; if (pDelBaParamSet->field.Initiator == 1) { struct rx_ts_record *pRxTs;