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 8A2A6347503; Wed, 8 Apr 2026 18:12:31 +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=1775671951; cv=none; b=qMAHCX7TmusIpxoAjVqHhUnueGJczSxyfPzU6isE5HupO68TIoobAbpLi38GOJGar42t3h4aYtg+kw1ukqidOTR/EkkxECa8Lrw/N+iRavTCK2372vRH/Hb/52Vawhl9Ki/xbn+9FEgXtm3qOuc7M+XOiFb7LVuB1Ma4jVucRPQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775671951; c=relaxed/simple; bh=TbTAwjXV5VIKkLHOg3tk6HKHTYxIWfVrRmWGHtI0fxY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZBktUecoq5WeTwVBOX9cXPkU5sGjadU7DQAiweHY081+rtLW+dmNZALpE/JS/wwy2Tphr4JsKBDmD6Pcp7D9rmflyI0v51XRt81Bh/9+XFLq1byMg31vW3od76blq6/Wgo2IKht9yYuzqmrXu+FeZ7p2WhdSry1PneM3aVznjI0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=mOhDaUFd; 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="mOhDaUFd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 19020C19421; Wed, 8 Apr 2026 18:12:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1775671951; bh=TbTAwjXV5VIKkLHOg3tk6HKHTYxIWfVrRmWGHtI0fxY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mOhDaUFdltjYZlMGkwhylzm9fYikoNRdPxxFl0QHk2LQT9FvBgLcm+z3kDVP7bPYB wc6N1HA5Jq+IG5H4pdaDa+gIaLfxvLQju5I6AEHoxNQPpG26n2fiMmCRFe8V3ZSAOL cLNSzsQ7Utr1JI5Bt7oepovEL2ToWjPS4BnzpBow= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dave Jiang , Vinicius Costa Gomes , Vinod Koul , Sasha Levin Subject: [PATCH 6.1 132/312] dmaengine: idxd: Fix freeing the allocated ida too late Date: Wed, 8 Apr 2026 20:00:49 +0200 Message-ID: <20260408175938.701562443@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260408175933.715315542@linuxfoundation.org> References: <20260408175933.715315542@linuxfoundation.org> User-Agent: quilt/0.69 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 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vinicius Costa Gomes [ Upstream commit c311f5e9248471a950f0a524c2fd736414d98900 ] It can happen that when the cdev .release() is called, the driver already called ida_destroy(). Move ida_free() to the _del() path. We see with DEBUG_KOBJECT_RELEASE enabled and forcing an early PCI unbind. Fixes: 04922b7445a1 ("dmaengine: idxd: fix cdev setup and free device lifetime issues") Reviewed-by: Dave Jiang Signed-off-by: Vinicius Costa Gomes Link: https://patch.msgid.link/20260121-idxd-fix-flr-on-kernel-queues-v3-v3-9-7ed70658a9d1@intel.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/dma/idxd/cdev.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c index e42c9a9f3c238..622cc47c6a182 100644 --- a/drivers/dma/idxd/cdev.c +++ b/drivers/dma/idxd/cdev.c @@ -45,11 +45,7 @@ struct idxd_user_context { static void idxd_cdev_dev_release(struct device *dev) { struct idxd_cdev *idxd_cdev = dev_to_cdev(dev); - struct idxd_cdev_context *cdev_ctx; - struct idxd_wq *wq = idxd_cdev->wq; - cdev_ctx = &ictx[wq->idxd->data->type]; - ida_free(&cdev_ctx->minor_ida, idxd_cdev->minor); kfree(idxd_cdev); } @@ -410,11 +406,15 @@ int idxd_wq_add_cdev(struct idxd_wq *wq) void idxd_wq_del_cdev(struct idxd_wq *wq) { + struct idxd_cdev_context *cdev_ctx; struct idxd_cdev *idxd_cdev; idxd_cdev = wq->idxd_cdev; wq->idxd_cdev = NULL; cdev_device_del(&idxd_cdev->cdev, cdev_dev(idxd_cdev)); + + cdev_ctx = &ictx[wq->idxd->data->type]; + ida_free(&cdev_ctx->minor_ida, idxd_cdev->minor); put_device(cdev_dev(idxd_cdev)); } -- 2.53.0