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=-9.9 required=3.0 tests=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 8BCEAC2BB54 for ; Tue, 7 Apr 2020 10:26:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5F8152080C for ; Tue, 7 Apr 2020 10:26:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586255170; bh=QAjVBsd8e5IbA+b+qruEdohp9CjMqPCmCzLociEPK+o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Qgut+B0sHEoJ3fgwUP1Eir2eQyez5aG8zOL564QD7uBg6wMGojQ0kAWQMDWiwBtZw irl1Rivc8ifKNVFTBbgdRKHeBq8oL6VJEc3HnLFx2gH2agSeGhhSMiIcyqB3VZfbM5 tIuHAPw//VvHs5YtL6LJlzup62AXzA6Rb9MUt76g= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728351AbgDGK0J (ORCPT ); Tue, 7 Apr 2020 06:26:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:37096 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729079AbgDGK0I (ORCPT ); Tue, 7 Apr 2020 06:26:08 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 39F7220771; Tue, 7 Apr 2020 10:26:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586255166; bh=QAjVBsd8e5IbA+b+qruEdohp9CjMqPCmCzLociEPK+o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pfbbyNGVdUPrWzoBiwBk5m146hNghYWWxiHES8iprjgbtainVmdmiMG4gTjHMnSKj /8pC5dG4m/d8M/6zYI2KVcoyLSyCBfAAiHGhbxWpUi1q8fMplZa8gc4WD1jh2TIE/A YrS0Rii0BH+eD2PmoRUoN8XKzS2bkEsRG4kwy8TI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Matthias Kaehlcke , Brian Norris , Douglas Anderson , Guenter Roeck , franky.lin@broadcom.com, Kalle Valo , Sasha Levin Subject: [PATCH 5.6 10/29] brcmfmac: abort and release host after error Date: Tue, 7 Apr 2020 12:22:07 +0200 Message-Id: <20200407101453.241931574@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200407101452.046058399@linuxfoundation.org> References: <20200407101452.046058399@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guenter Roeck [ Upstream commit 863844ee3bd38219c88e82966d1df36a77716f3e ] With commit 216b44000ada ("brcmfmac: Fix use after free in brcmf_sdio_readframes()") applied, we see locking timeouts in brcmf_sdio_watchdog_thread(). brcmfmac: brcmf_escan_timeout: timer expired INFO: task brcmf_wdog/mmc1:621 blocked for more than 120 seconds. Not tainted 4.19.94-07984-g24ff99a0f713 #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. brcmf_wdog/mmc1 D 0 621 2 0x00000000 last_sleep: 2440793077. last_runnable: 2440766827 [] (__schedule) from [] (schedule+0x98/0xc4) [] (schedule) from [] (__mmc_claim_host+0x154/0x274) [] (__mmc_claim_host) from [] (brcmf_sdio_watchdog_thread+0x1b0/0x1f8 [brcmfmac]) [] (brcmf_sdio_watchdog_thread [brcmfmac]) from [] (kthread+0x178/0x180) In addition to restarting or exiting the loop, it is also necessary to abort the command and to release the host. Fixes: 216b44000ada ("brcmfmac: Fix use after free in brcmf_sdio_readframes()") Cc: Dan Carpenter Cc: Matthias Kaehlcke Cc: Brian Norris Cc: Douglas Anderson Signed-off-by: Guenter Roeck Reviewed-by: Douglas Anderson Acked-by: franky.lin@broadcom.com Acked-by: Dan Carpenter Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c index f9047db6a11d8..3a08252f1a53f 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c @@ -1938,6 +1938,8 @@ static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes) if (brcmf_sdio_hdparse(bus, bus->rxhdr, &rd_new, BRCMF_SDIO_FT_NORMAL)) { rd->len = 0; + brcmf_sdio_rxfail(bus, true, true); + sdio_release_host(bus->sdiodev->func1); brcmu_pkt_buf_free_skb(pkt); continue; } -- 2.20.1