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 D7F7A342CA7; Sat, 30 May 2026 17:54:21 +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=1780163667; cv=none; b=jk/2t1tuMXVReijApRY0SGf/G5cmq7h1ctFLCGIoVWDIjj9N68I8DPGRCv/QbCRzHnKDZSIIMyWv4yZR2aEHZeyUhMCAmh4oOM+DZIGLJSsREMlgz0Kvw9nC+rLju8VSNP/Zl/v1xr7yMC8eeDX6bLWMD0Yz+8MLvYqU3mlEz8w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780163667; c=relaxed/simple; bh=1DwKcCVbyHSG0NglLdtUs0+JalyaG0RTCkn8c5tErjg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Nb2Y7p5EcI90SwtBwAaBCsyCdwQje2TK9Jg0A0TNJ8P5zv2EqCzhIQ2t291KWsVs0Yp1/Ghx86GxqAEe9OwCYqqS3NTbs6m+tUWNYMN3ddDuyNf96uhdQMvYUVyBVBASJ+Ty1/7SrRzvSWUfcpzv8noMXPsPq1T2pJtiWvQIqZA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=I3KqYlUA; 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="I3KqYlUA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CF4AB1F00893; Sat, 30 May 2026 17:54:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780163661; bh=5k69gmqfJQBwAHF0+ftY2YkJQtf3pcEdkROGBB4M+es=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=I3KqYlUA4qQ86DmjNu+r12XdXuO6DtNB2GbJnJOB1Ag0KDb1UhRazAiqEPzsqQHeL A2reWmUhLLWGSbh6J4lJe+cTyTMsKFUtEL0bNcV5kVypryE68vhGlNXrNeQ1RGMSUH OJ0QhbWjoRDPPtBxooxx30Sm6BOk04oDoA7jFC2g= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tomoya MORINAGA , Johan Hovold , Mark Brown Subject: [PATCH 5.15 323/776] spi: topcliff-pch: fix use-after-free on unbind Date: Sat, 30 May 2026 18:00:37 +0200 Message-ID: <20260530160248.916193890@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160240.228940103@linuxfoundation.org> References: <20260530160240.228940103@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johan Hovold commit 9d72732fe70c11424bc90ed466c7ccfa58b42a9a upstream. Give the driver a chance to flush its queue before releasing the DMA buffers on driver unbind Fixes: c37f3c2749b5 ("spi/topcliff_pch: DMA support") Cc: stable@vger.kernel.org # 3.1 Cc: Tomoya MORINAGA Signed-off-by: Johan Hovold Link: https://patch.msgid.link/20260414134319.978196-9-johan@kernel.org Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- drivers/spi/spi-topcliff-pch.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -1427,9 +1427,6 @@ static int pch_spi_pd_remove(struct plat dev_dbg(&plat_dev->dev, "%s:[ch%d] irq=%d\n", __func__, plat_dev->id, board_dat->pdev->irq); - if (use_dma) - pch_free_dma_buf(board_dat, data); - /* check for any pending messages; no action is taken if the queue * is still full; but at least we tried. Unload anyway */ count = 500; @@ -1453,6 +1450,9 @@ static int pch_spi_pd_remove(struct plat free_irq(board_dat->pdev->irq, data); } + if (use_dma) + pch_free_dma_buf(board_dat, data); + pci_iounmap(board_dat->pdev, data->io_remap_addr); spi_unregister_master(data->master);