From: Ivan Safonov insafonov@gmail.com
[ Upstream commit 628cbd971a927abe6388d44320e351c337b331e4 ]
skb clones use same data buffer, so tail of one skb is corrupted by beginning of next skb.
Signed-off-by: Ivan Safonov insafonov@gmail.com Link: https://lore.kernel.org/r/20200423191404.12028-1-insafonov@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/staging/rtl8188eu/core/rtw_recv.c | 19 ++++++------------- 1 file changed, 6 insertions(+), 13 deletions(-)
diff --git a/drivers/staging/rtl8188eu/core/rtw_recv.c b/drivers/staging/rtl8188eu/core/rtw_recv.c index 17b4b9257b49..0ddf41b5a734 100644 --- a/drivers/staging/rtl8188eu/core/rtw_recv.c +++ b/drivers/staging/rtl8188eu/core/rtw_recv.c @@ -1535,21 +1535,14 @@ static int amsdu_to_msdu(struct adapter *padapter, struct recv_frame *prframe)
/* Allocate new skb for releasing to upper layer */ sub_skb = dev_alloc_skb(nSubframe_Length + 12); - if (sub_skb) { - skb_reserve(sub_skb, 12); - skb_put_data(sub_skb, pdata, nSubframe_Length); - } else { - sub_skb = skb_clone(prframe->pkt, GFP_ATOMIC); - if (sub_skb) { - sub_skb->data = pdata; - sub_skb->len = nSubframe_Length; - skb_set_tail_pointer(sub_skb, nSubframe_Length); - } else { - DBG_88E("skb_clone() Fail!!! , nr_subframes=%d\n", nr_subframes); - break; - } + if (!sub_skb) { + DBG_88E("dev_alloc_skb() Fail!!! , nr_subframes=%d\n", nr_subframes); + break; }
+ skb_reserve(sub_skb, 12); + skb_put_data(sub_skb, pdata, nSubframe_Length); + subframes[nr_subframes++] = sub_skb;
if (nr_subframes >= MAX_SUBFRAME_COUNT) {