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Message-ID: <55ABE9B2.6020806@gmail.com> Date: Sun, 19 Jul 2015 20:17:22 +0200 From: Mateusz Kulikowski <mateusz.kulikowski@...il.com> To: Dan Carpenter <dan.carpenter@...cle.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org> CC: Vaishali Thakkar <vthakkar1994@...il.com>, Mahati Chamarthy <mahati.chamarthy@...il.com>, Chen Gang <gang.chen.5i5j@...il.com>, Matthew Casey <mdcasey@...bloom.com>, devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org Subject: Re: [patch 2/2 v2] Staging: rtl8192e: pointer math bug in rtllib_rx_DELBA() On 19.07.2015 12:52, Dan Carpenter wrote: > 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 <mateusz.kulikowski@...il.com> > Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com> > --- > v2: Mateusz noticed some more pointer math bugs on the next lines. > > diff --git a/drivers/staging/rtl8192e/rtl819x_BAProc.c b/drivers/staging/rtl8192e/rtl819x_BAProc.c > index 60f536c..78ede4a 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; > Acked/Tested-by me Thanks, Mateusz -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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