From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 26E9623BCFD; Mon, 2 Jun 2025 14:22:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748874124; cv=none; b=ZoHCyDb1M976hRd+Zq2BUqlvLmOmdtH9sq6U55qLNDoY78QJpZ8+YsFkgyPXscCQoAfFvHi69Hx9AAbg1oC8zT5maEkqd2DC6dIJ44EnUoU+MlEsiq2f4Lw34AR09Qbq1W89gTV8a5jaQqqDAZ9fOUsrG7XDHhVFiRrABGh5U2o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748874124; c=relaxed/simple; bh=ARGdWd9W1MYoECJRfEHRq2DOlFj9E0fy0UoCyWZBRyU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eF3hMf6Rl3Q2F1R0TD2SDsph1dXESUNcbBUKU5Aa01GYM8LY0j7SNXXiGPADyEYHx67jBvx8cJ1e/Ge3z8NfL8QAU+Utq+9JE/RW/XHkbtRl72KN5S0Gf8+h4FOJFLBBEEd1ZIhHQRaslH3pahGzfERSy+ea16f2wdtSN+5/pAw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=DaWN2Hrz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="DaWN2Hrz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A9E2EC4CEF0; Mon, 2 Jun 2025 14:22:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1748874124; bh=ARGdWd9W1MYoECJRfEHRq2DOlFj9E0fy0UoCyWZBRyU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DaWN2HrzTgRjByIyHtBEK96IxSa+cwiUm3haKi4ejlMqgRkNdTlXF9X11yRzAP7fI r1mWd7ZRNf6LxvLAsjXWTxONhBQ3r+vVd6NJQYfGwp1pvAyCnzJ9Y1TYJNSb40B3KI 8JetcgiQPx6f6u0qBvsdf50cNHCMPaOQb/NA+NGU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, kernel test robot , Dave Jiang , Vinod Koul , Sasha Levin Subject: [PATCH 6.6 338/444] dmaengine: idxd: Fix ->poll() return value Date: Mon, 2 Jun 2025 15:46:42 +0200 Message-ID: <20250602134354.645512681@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250602134340.906731340@linuxfoundation.org> References: <20250602134340.906731340@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dave Jiang [ Upstream commit ae74cd15ade833adc289279b5c6f12e78f64d4d7 ] The fix to block access from different address space did not return a correct value for ->poll() change. kernel test bot reported that a return value of type __poll_t is expected rather than int. Fix to return POLLNVAL to indicate invalid request. Fixes: 8dfa57aabff6 ("dmaengine: idxd: Fix allowing write() from different address spaces") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202505081851.rwD7jVxg-lkp@intel.com/ Signed-off-by: Dave Jiang Link: https://lore.kernel.org/r/20250508170548.2747425-1-dave.jiang@intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/dma/idxd/cdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c index ba53675ced55a..6cfcef3cf4cd1 100644 --- a/drivers/dma/idxd/cdev.c +++ b/drivers/dma/idxd/cdev.c @@ -505,7 +505,7 @@ static __poll_t idxd_cdev_poll(struct file *filp, __poll_t out = 0; if (current->mm != ctx->mm) - return -EPERM; + return POLLNVAL; poll_wait(filp, &wq->err_queue, wait); spin_lock(&idxd->dev_lock); -- 2.39.5