From patchwork Wed Nov 24 14:37:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 12637011 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6E258C433F5 for ; Wed, 24 Nov 2021 14:37:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357060AbhKXOk4 (ORCPT ); Wed, 24 Nov 2021 09:40:56 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:34443 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349684AbhKXOku (ORCPT ); Wed, 24 Nov 2021 09:40:50 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1637764660; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=2eFPwkBPSqPY67/O1/+YH8rSc4RzYs89OEyta9CYqvE=; b=CJs59DBFeZb1NsowCuQaB7cz3Jhbo5j3JTkkIN5uoTXyWbXe5DXhWF+7qTY7GIBI1fZCFN XnfAapjfvvfqyM1O7ervAZuG4bZ+/TkGoGegvjTGMC2npNaCOu7Dg50kvzr6zCe7Qtqfyj ICeqMUCPEAlN/ILrc2+Kp0Fizro+n2Q= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-467--1Rux0--PfKVUJd_vv2mEg-1; Wed, 24 Nov 2021 09:37:36 -0500 X-MC-Unique: -1Rux0--PfKVUJd_vv2mEg-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 63EA983DD21; Wed, 24 Nov 2021 14:37:35 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.25]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1888226FA3; Wed, 24 Nov 2021 14:37:33 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 1/2] rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle() From: David Howells To: Eiichi Tsukata Cc: Marc Dionne , linux-afs@lists.infradead.org, dhowells@redhat.com, kuba@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Date: Wed, 24 Nov 2021 14:37:33 +0000 Message-ID: <163776465314.1844202.9057900281265187616.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.23 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Eiichi Tsukata Need to call rxrpc_put_peer() for bundle candidate before kfree() as it holds a ref to rxrpc_peer. [DH: v2: Changed to abstract out the bundle freeing code into a function] Fixes: 245500d853e9 ("rxrpc: Rewrite the client connection manager") Signed-off-by: Eiichi Tsukata Signed-off-by: David Howells cc: Marc Dionne cc: linux-afs@lists.infradead.org Link: https://lore.kernel.org/r/20211121041608.133740-1-eiichi.tsukata@nutanix.com/ # v1 Reviewed-by: Marc Dionne --- net/rxrpc/conn_client.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/net/rxrpc/conn_client.c b/net/rxrpc/conn_client.c index dbea0bfee48e..8120138dac01 100644 --- a/net/rxrpc/conn_client.c +++ b/net/rxrpc/conn_client.c @@ -135,16 +135,20 @@ struct rxrpc_bundle *rxrpc_get_bundle(struct rxrpc_bundle *bundle) return bundle; } +static void rxrpc_free_bundle(struct rxrpc_bundle *bundle) +{ + rxrpc_put_peer(bundle->params.peer); + kfree(bundle); +} + void rxrpc_put_bundle(struct rxrpc_bundle *bundle) { unsigned int d = bundle->debug_id; unsigned int u = atomic_dec_return(&bundle->usage); _debug("PUT B=%x %u", d, u); - if (u == 0) { - rxrpc_put_peer(bundle->params.peer); - kfree(bundle); - } + if (u == 0) + rxrpc_free_bundle(bundle); } /* @@ -328,7 +332,7 @@ static struct rxrpc_bundle *rxrpc_look_up_bundle(struct rxrpc_conn_parameters *c return candidate; found_bundle_free: - kfree(candidate); + rxrpc_free_bundle(candidate); found_bundle: rxrpc_get_bundle(bundle); spin_unlock(&local->client_bundles_lock);