From patchwork Mon May 16 19:36:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 573853 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 0FC44C433FE for ; Mon, 16 May 2022 19:44:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235473AbiEPToA (ORCPT ); Mon, 16 May 2022 15:44:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44062 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345979AbiEPTnQ (ORCPT ); Mon, 16 May 2022 15:43:16 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A19EC3FD84; Mon, 16 May 2022 12:42:23 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 4FA60B81609; Mon, 16 May 2022 19:42:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 958D0C385AA; Mon, 16 May 2022 19:42:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1652730141; bh=UpC0tQdo81iZrDFH8c2hiKSi7meuaYZI9mUM8n0sqGo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NGObXw26kbPFTaWk7hfzYvJT4IHwNcFJDjshI0d6F2MNOuUFAQWM8rVcv94aAiodd 3BSWD4FhZ49GEAfw1GT0ODyWg0/qFs/qAnOGoPf/fPziwos135jv40edhOzpJk7Btf 2sGy47GXCnsj1XY5mFT9mKezRxyvJFcO4XiMQ17w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alexandra Winter , "David S. Miller" , Sasha Levin Subject: [PATCH 5.4 12/43] s390/ctcm: fix potential memory leak Date: Mon, 16 May 2022 21:36:23 +0200 Message-Id: <20220516193615.081329510@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220516193614.714657361@linuxfoundation.org> References: <20220516193614.714657361@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Alexandra Winter [ Upstream commit 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a ] smatch complains about drivers/s390/net/ctcm_mpc.c:1210 ctcmpc_unpack_skb() warn: possible memory leak of 'mpcginfo' mpc_action_discontact() did not free mpcginfo. Consolidate the freeing in ctcmpc_unpack_skb(). Fixes: 293d984f0e36 ("ctcm: infrastructure for replaced ctc driver") Signed-off-by: Alexandra Winter Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/s390/net/ctcm_mpc.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/s390/net/ctcm_mpc.c b/drivers/s390/net/ctcm_mpc.c index ab316baa8284..d766002bc5be 100644 --- a/drivers/s390/net/ctcm_mpc.c +++ b/drivers/s390/net/ctcm_mpc.c @@ -626,8 +626,6 @@ static void mpc_rcvd_sweep_resp(struct mpcg_info *mpcginfo) ctcm_clear_busy_do(dev); } - kfree(mpcginfo); - return; } @@ -1206,10 +1204,10 @@ static void ctcmpc_unpack_skb(struct channel *ch, struct sk_buff *pskb) CTCM_FUNTAIL, dev->name); priv->stats.rx_dropped++; /* mpcginfo only used for non-data transfers */ - kfree(mpcginfo); if (do_debug_data) ctcmpc_dump_skb(pskb, -8); } + kfree(mpcginfo); } done: @@ -1991,7 +1989,6 @@ static void mpc_action_rcvd_xid0(fsm_instance *fsm, int event, void *arg) } break; } - kfree(mpcginfo); CTCM_PR_DEBUG("ctcmpc:%s() %s xid2:%i xid7:%i xidt_p2:%i \n", __func__, ch->id, grp->outstanding_xid2, @@ -2052,7 +2049,6 @@ static void mpc_action_rcvd_xid7(fsm_instance *fsm, int event, void *arg) mpc_validate_xid(mpcginfo); break; } - kfree(mpcginfo); return; }