From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE12DC43464 for ; Fri, 18 Sep 2020 02:42:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A9D15214D8 for ; Fri, 18 Sep 2020 02:42:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600396963; bh=zfh1yQvoSMT8e6XSBmOpS1/gJtYedwcqb2MkD/f3h3M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=izDI3jmoWq5/izJwIWQP/4eo8fjs/HrgAEIqeu1fvArkIG4rI6mJc1VSOllnSA09f xes1Zjns1MLCIWCGKm1p2lNV3nA2Akd4tfcoLAYdksCIj/IPcDXWhWpUX/AD946TgE 8xvjhU+trCfDHhsh18tUAL6hNv1a6saMlFaVQiLQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729231AbgIRCml (ORCPT ); Thu, 17 Sep 2020 22:42:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:36340 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727650AbgIRCLG (ORCPT ); Thu, 17 Sep 2020 22:11:06 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2B7BD23119; Fri, 18 Sep 2020 02:11:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600395065; bh=zfh1yQvoSMT8e6XSBmOpS1/gJtYedwcqb2MkD/f3h3M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DmO3n1TsjOMr8yOXwWJfAxBFZ12PhA1yQuJ+HECcrG+TB30r+dFYWkSaLbk3xphJA nKiKi1rf8080htWb4a4zVu5TzyKdo55oDQX9JYckj0L6fhKBXU0YyXATx1i/Zr8skA d2MHGuH8dgu3XMXF6L0dJWnzpUZHuUbgm8Qdx50s= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ivan Safonov , Greg Kroah-Hartman , Sasha Levin , devel@driverdev.osuosl.org Subject: [PATCH AUTOSEL 4.19 151/206] staging:r8188eu: avoid skb_clone for amsdu to msdu conversion Date: Thu, 17 Sep 2020 22:07:07 -0400 Message-Id: <20200918020802.2065198-151-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200918020802.2065198-1-sashal@kernel.org> References: <20200918020802.2065198-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ivan Safonov [ 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 Link: https://lore.kernel.org/r/20200423191404.12028-1-insafonov@gmail.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- 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 17b4b9257b495..0ddf41b5a734a 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) { -- 2.25.1