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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 C26FDC433ED for ; Mon, 12 Apr 2021 08:57:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A24F66127B for ; Mon, 12 Apr 2021 08:57:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238458AbhDLI5y (ORCPT ); Mon, 12 Apr 2021 04:57:54 -0400 Received: from mail.kernel.org ([198.145.29.99]:49000 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238524AbhDLIzy (ORCPT ); Mon, 12 Apr 2021 04:55:54 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0060461221; Mon, 12 Apr 2021 08:55:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1618217736; bh=sVrCajMgdgNpzRj2BTgdDucVtkmO2lc2YYecXck1zLU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Wjp7CSzoLLtTWfUFxguVK4KzKTdb88HGiBN/FF4bHLgk8oyPMYnTGFUziZHhzfSAx j1XSV4s3T2ZSXIoQZ5pbTVCrRCPrd+yAzlBPXRj7hTtB+lqkOYbLtffef9Fe8nrCK/ UKZgBrQ1dBFwl9yKaJBK3nbqmgYqZEcJumgLtPpQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+739016799a89c530b32a@syzkaller.appspotmail.com, Loic Poulain , Bjorn Andersson , Manivannan Sadhasivam , "David S. Miller" , Sasha Levin Subject: [PATCH 5.10 126/188] net: qrtr: Fix memory leak on qrtr_tx_wait failure Date: Mon, 12 Apr 2021 10:40:40 +0200 Message-Id: <20210412084017.836981182@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210412084013.643370347@linuxfoundation.org> References: <20210412084013.643370347@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Loic Poulain [ Upstream commit 8a03dd925786bdc3834d56ccc980bb70668efa35 ] qrtr_tx_wait does not check for radix_tree_insert failure, causing the 'flow' object to be unreferenced after qrtr_tx_wait return. Fix that by releasing flow on radix_tree_insert failure. Fixes: 5fdeb0d372ab ("net: qrtr: Implement outgoing flow control") Reported-by: syzbot+739016799a89c530b32a@syzkaller.appspotmail.com Signed-off-by: Loic Poulain Reviewed-by: Bjorn Andersson Reviewed-by: Manivannan Sadhasivam Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/qrtr/qrtr.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c index 45fbf5f4dcd2..93a7edcff11e 100644 --- a/net/qrtr/qrtr.c +++ b/net/qrtr/qrtr.c @@ -266,7 +266,10 @@ static int qrtr_tx_wait(struct qrtr_node *node, int dest_node, int dest_port, flow = kzalloc(sizeof(*flow), GFP_KERNEL); if (flow) { init_waitqueue_head(&flow->resume_tx); - radix_tree_insert(&node->qrtr_tx_flow, key, flow); + if (radix_tree_insert(&node->qrtr_tx_flow, key, flow)) { + kfree(flow); + flow = NULL; + } } } mutex_unlock(&node->qrtr_tx_lock); -- 2.30.2