From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A9E4D440A16; Wed, 23 Sep 2026 14:51:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790175095; cv=none; b=iHMpYcck6uSyNCaYnHlZZyl7D3xDPHh//ld48PgxuI8Bp1Ww2eWvC/2dFp5Gh7r1R4spV/lh4BnBWoyq7aVyab4HN0J160VaNc1Ec8OOjG19WrOniTsBB21Wbc3y76CByUBCJ0GiCRSyTyAkboxvaUdlqsaHRAJOcycQnHafVhs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790175095; c=relaxed/simple; bh=pMU7Ic4tzUeoUfXzIHEB08cJaaEIAWT8VsCVeCMDDwM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pi6b7cXvi6Mf5dLY4BKVx7XO/Lw/JCs0jzvFJvmUnBLBVgleJhnoKa2y2XqlaleSl/xocShnpsaEeQv/9xy0hV14/CZ40Nl0jvKXY3EhVxR7DqC0+YkSGuHnoebPQwHc7buTyLzDXfQzh0P3qjWaXHrCSpWSEyT7CDAcIHBuXAE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=myNZoUab; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="myNZoUab" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 834221F000FF; Wed, 23 Sep 2026 14:51:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790175093; bh=8RFTf8Y+PdtxLNv5PxSrdzGRlT6p+TRRVaE45klBi/E=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=myNZoUabRFnTfpq4R7zy+47R5NUNfbzs48F/mlogOoQXWL3d6LFoV2v8UF6nlzyNF e6fpLeRnIz1drT+xyXOo7qogkM1xXvrBRMnDpFRS7Ue0K0xLuAuFpfzpQ15DLOuJBP +i7v/7bMSExvWzMxyAoJXiDhshM1TLiJu7Z0segQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Fan Wu , Ulf Hansson Subject: [PATCH 6.18 284/398] mmc: mxcmmc: cancel data work and watchdog on remove Date: Wed, 23 Sep 2026 16:05:58 +0200 Message-ID: <20260923140650.779056030@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260923140643.441954610@linuxfoundation.org> References: <20260923140643.441954610@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fan Wu commit d3a421c82412344022982d5b91ba23194a0a6f29 upstream. mxcmci_remove() frees the host through the devm tail, but neither it nor mmc_remove_host() drains the driver's own asynchronous state. host->watchdog, a 10 s timer armed on the DMA path in mxcmci_setup_data(), is deleted only by the DMA- and IRQ-complete paths, which the remove path does not explicitly drain; it can therefore fire after the host is freed and dereference it in mxcmci_watchdog(). host->datawork, armed from the IRQ handler on the PIO path, is not cancelled by the remove path either. Free the devm-registered IRQ, then cancel datawork and delete the watchdog in mxcmci_remove(), before dma_release_channel(). Freeing the IRQ first keeps a trailing handler from re-arming datawork between the cancel and the host free. Both callbacks are non-self-rearming. This issue was found by an in-house static analysis tool. Fixes: f6ad0a481342 ("mmc: mxcmmc: fix bug that may block a data transfer forever") Cc: stable@vger.kernel.org Assisted-by: Codex:gpt-5.6 Signed-off-by: Fan Wu Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/mxcmmc.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/mmc/host/mxcmmc.c +++ b/drivers/mmc/host/mxcmmc.c @@ -1173,6 +1173,10 @@ static void mxcmci_remove(struct platfor mmc_remove_host(mmc); + devm_free_irq(&pdev->dev, platform_get_irq(pdev, 0), host); + cancel_work_sync(&host->datawork); + timer_delete_sync(&host->watchdog); + if (host->pdata && host->pdata->exit) host->pdata->exit(&pdev->dev, mmc);