netdev - brcmfmac: fix skb leak in brcmf_sdio_txpkt_prep

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Message-ID: <20140306205108.GA16008@redhat.com>
Date:	Thu, 6 Mar 2014 15:51:08 -0500
From:	Dave Jones <davej@...hat.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:	Arend van Spriel <arend@...adcom.com>, netdev@...r.kernel.org,
	linville@...driver.com, linux-coverity@...r.kernel.org
Subject: brcmfmac: fix skb leak in brcmf_sdio_txpkt_prep_sg error path.

Commit 1eb4301867 (brcmfmac: fix txglomming scatter-gather packet transfers)
added an allocation of an skb via brcmu_pkt_buf_get_skb() but forgot to
free it on one of the error paths.

Acked-by: Arend van Spriel <arend@...adcom.com>
Signed-off-by: Dave Jones<davej@...oraproject.org>

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
index 119ee6eaf1c3..ddaa9efd053d 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
@@ -1948,8 +1948,10 @@ static int brcmf_sdio_txpkt_prep_sg(struct brcmf_sdio *bus,
 		if (pkt_pad == NULL)
 			return -ENOMEM;
 		ret = brcmf_sdio_txpkt_hdalign(bus, pkt_pad);
-		if (unlikely(ret < 0))
+		if (unlikely(ret < 0)) {
+			kfree_skb(pkt_pad);
 			return ret;
+		}
 		memcpy(pkt_pad->data,
 		       pkt->data + pkt->len - tail_chop,
 		       tail_chop);


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