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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51621EB64DD for ; Mon, 26 Jun 2023 18:19:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231452AbjFZSTO (ORCPT ); Mon, 26 Jun 2023 14:19:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231530AbjFZSTJ (ORCPT ); Mon, 26 Jun 2023 14:19:09 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0735610CB for ; Mon, 26 Jun 2023 11:19:09 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9961F60F39 for ; Mon, 26 Jun 2023 18:19:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A802FC433C0; Mon, 26 Jun 2023 18:19:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687803548; bh=L+4/jXpgVXLoejmE/s8K69GuiFib2xP2AzggdEype/k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=J5NMVBbE7mUPjOI05jIjurh74AfACTVDn/voBnIovcVMJegI7j9bKt55nt5zodfKH 5ccSK880MlbyQ0/KBjidEsQNsr+WV2lKk+QjfOGu0eYfc5NtHh+xQ1d5OFQsxrw72m +sKOzgcPGoekcTOKLGCh01P4Ik6FfsAZK9hzlAVw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Miquel Raynal , Alexander Aring , Chen Aotian , Stefan Schmidt , Sasha Levin Subject: [PATCH 6.3 099/199] ieee802154: hwsim: Fix possible memory leaks Date: Mon, 26 Jun 2023 20:10:05 +0200 Message-ID: <20230626180809.971050089@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230626180805.643662628@linuxfoundation.org> References: <20230626180805.643662628@linuxfoundation.org> User-Agent: quilt/0.67 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: Chen Aotian [ Upstream commit a61675294735570daca3779bd1dbb3715f7232bd ] After replacing e->info, it is necessary to free the old einfo. Fixes: f25da51fdc38 ("ieee802154: hwsim: add replacement for fakelb") Reviewed-by: Miquel Raynal Reviewed-by: Alexander Aring Signed-off-by: Chen Aotian Link: https://lore.kernel.org/r/20230409022048.61223-1-chenaotian2@163.com Signed-off-by: Stefan Schmidt Signed-off-by: Sasha Levin --- drivers/net/ieee802154/mac802154_hwsim.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c index 8445c2189d116..31cba9aa76366 100644 --- a/drivers/net/ieee802154/mac802154_hwsim.c +++ b/drivers/net/ieee802154/mac802154_hwsim.c @@ -685,7 +685,7 @@ static int hwsim_del_edge_nl(struct sk_buff *msg, struct genl_info *info) static int hwsim_set_edge_lqi(struct sk_buff *msg, struct genl_info *info) { struct nlattr *edge_attrs[MAC802154_HWSIM_EDGE_ATTR_MAX + 1]; - struct hwsim_edge_info *einfo; + struct hwsim_edge_info *einfo, *einfo_old; struct hwsim_phy *phy_v0; struct hwsim_edge *e; u32 v0, v1; @@ -723,8 +723,10 @@ static int hwsim_set_edge_lqi(struct sk_buff *msg, struct genl_info *info) list_for_each_entry_rcu(e, &phy_v0->edges, list) { if (e->endpoint->idx == v1) { einfo->lqi = lqi; - rcu_assign_pointer(e->info, einfo); + einfo_old = rcu_replace_pointer(e->info, einfo, + lockdep_is_held(&hwsim_phys_lock)); rcu_read_unlock(); + kfree_rcu(einfo_old, rcu); mutex_unlock(&hwsim_phys_lock); return 0; } -- 2.39.2