Commit 44656b93 authored by Peter S. Housel's avatar Peter S. Housel Committed by Greg Kroah-Hartman

brcmfmac: Fix glom_skb leak in brcmf_sdiod_recv_chain

[ Upstream commit 5ea59db8 ]

An earlier change to this function (3bdae810) fixed a leak in the
case of an unsuccessful call to brcmf_sdiod_buffrw(). However, the
glom_skb buffer, used for emulating a scattering read, is never used
or referenced after its contents are copied into the destination
buffers, and therefore always needs to be freed by the end of the
function.

Fixes: 3bdae810 ("brcmfmac: Fix glob_skb leak in brcmf_sdiod_recv_chain")
Fixes: a413e39a ("brcmfmac: fix brcmf_sdcard_recv_chain() for host without sg support")
Cc: stable@vger.kernel.org # 4.9.x-
Signed-off-by: 's avatarPeter S. Housel <housel@acm.org>
Signed-off-by: 's avatarArend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: 's avatarKalle Valo <kvalo@codeaurora.org>
Signed-off-by: 's avatarSasha Levin <sashal@kernel.org>
parent 02bc5312
......@@ -705,7 +705,7 @@ done:
int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev,
struct sk_buff_head *pktq, uint totlen)
{
struct sk_buff *glom_skb;
struct sk_buff *glom_skb = NULL;
struct sk_buff *skb;
u32 addr = sdiodev->sbwad;
int err = 0;
......@@ -726,10 +726,8 @@ int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev,
return -ENOMEM;
err = brcmf_sdiod_buffrw(sdiodev, SDIO_FUNC_2, false, addr,
glom_skb);
if (err) {
brcmu_pkt_buf_free_skb(glom_skb);
if (err)
goto done;
}
skb_queue_walk(pktq, skb) {
memcpy(skb->data, glom_skb->data, skb->len);
......@@ -740,6 +738,7 @@ int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev,
pktq);
done:
brcmu_pkt_buf_free_skb(glom_skb);
return err;
}
......
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