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=-13.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 4EF14C4727C for ; Tue, 29 Sep 2020 11:39:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 07B612083B for ; Tue, 29 Sep 2020 11:39:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601379540; bh=4aJ98UjtJt7kaQkL7jPD6T/htJNsIC50/6P6Y5BPc+A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=owYDTc/a9KrmPpQwyPMw/G1fUWP5Xc0lVE1/VTxqSqGwmR+EyND42XDbliwb3loo0 n2tZUv5t8vM65kvLqQmfi59msDj4eLydW57Ruo1UU2YAekeYrJ4sNmyaPYpBnMazRz KV+UVrkWv4Ax10YqeWsDrqkhpoRKmsCoq4E9W4ts= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728872AbgI2Li6 (ORCPT ); Tue, 29 Sep 2020 07:38:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:60716 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730402AbgI2Lio (ORCPT ); Tue, 29 Sep 2020 07:38:44 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EB9B42074A; Tue, 29 Sep 2020 11:38:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601379523; bh=4aJ98UjtJt7kaQkL7jPD6T/htJNsIC50/6P6Y5BPc+A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s56hqB9vLjTZpnYxGYIbb1XibKnjqDo/Fmzo3lkcu39j7HEiTtwtJZ0Yf5dK5zPKC tU+3weT3eLCWFuF4olRH6fAyEVyp0pf9kwWvhR8daxwUam8qKj7xKRPrCIHJdfSxG3 IEyISqXrvIWCCvzYaQpjljUJXRz/vunBAHnmVNKI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Raveendran Somu , Chi-hsien Lin , Kalle Valo , Sasha Levin Subject: [PATCH 5.4 202/388] brcmfmac: Fix double freeing in the fmac usb data path Date: Tue, 29 Sep 2020 12:58:53 +0200 Message-Id: <20200929110020.261842195@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200929110010.467764689@linuxfoundation.org> References: <20200929110010.467764689@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Raveendran Somu [ Upstream commit 78179869dc3f5c0059bbf5d931a2717f1ad97ecd ] When the brcmf_fws_process_skb() fails to get hanger slot for queuing the skb, it tries to free the skb. But the caller brcmf_netdev_start_xmit() of that funciton frees the packet on error return value. This causes the double freeing and which caused the kernel crash. Signed-off-by: Raveendran Somu Signed-off-by: Chi-hsien Lin Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/1585124429-97371-3-git-send-email-chi-hsien.lin@cypress.com Signed-off-by: Sasha Levin --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c index eadc64454839d..3d36b6ee158bb 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c @@ -2149,8 +2149,7 @@ int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb) brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb); brcmf_fws_schedule_deq(fws); } else { - bphy_err(drvr, "drop skb: no hanger slot\n"); - brcmf_txfinalize(ifp, skb, false); + bphy_err(drvr, "no hanger slot available\n"); rc = -ENOMEM; } brcmf_fws_unlock(fws); -- 2.25.1