From patchwork Thu Sep 16 20:18:36 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sven Eckelmann X-Patchwork-Id: 370 Return-Path: Received: from mail.gmx.net (mailout-de.gmx.net [213.165.64.23]) by open-mesh.org (Postfix) with SMTP id 4C23F15430E for ; Thu, 16 Sep 2010 22:18:00 +0200 (CEST) Received: (qmail invoked by alias); 16 Sep 2010 20:17:59 -0000 Received: from unknown (EHLO sven-desktop.lazhur.ath.cx) [89.246.214.232] by mail.gmx.net (mp009) with SMTP; 16 Sep 2010 22:17:59 +0200 X-Authenticated: #15668376 X-Provags-ID: V01U2FsdGVkX19bEnYQAtdbJhv2pMn6QFcHC2Y5RthIruZIneXmxI UPmvtTQqbBxSon From: Sven Eckelmann To: b.a.t.m.a.n@lists.open-mesh.net Date: Thu, 16 Sep 2010 22:18:36 +0200 Message-Id: <1284668317-19890-4-git-send-email-sven.eckelmann@gmx.de> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1284668317-19890-1-git-send-email-sven.eckelmann@gmx.de> References: <1284668317-19890-1-git-send-email-sven.eckelmann@gmx.de> X-Y-GMX-Trusted: 0 Subject: [B.A.T.M.A.N.] [PATCH 3/4] batman-adv: Always protect list_for_each_entry_rcu with RCU X-BeenThere: b.a.t.m.a.n@lists.open-mesh.org X-Mailman-Version: 2.1.11 Precedence: list Reply-To: The list for a Better Approach To Mobile Ad-hoc Networking List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 16 Sep 2010 20:18:00 -0000 receive_bat_packet is not called with rcu_read_lock so we must ensure by ourself that we protect list_for_each_entry_rcu using the correct RCU locks. Signed-off-by: Sven Eckelmann --- batman-adv/routing.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/batman-adv/routing.c b/batman-adv/routing.c index 603a932..1781b7e 100644 --- a/batman-adv/routing.c +++ b/batman-adv/routing.c @@ -575,6 +575,7 @@ void receive_bat_packet(struct ethhdr *ethhdr, batman_packet->tq, batman_packet->ttl, batman_packet->version, has_directlink_flag); + rcu_read_lock(); list_for_each_entry_rcu(batman_if, &if_list, list) { if (batman_if->if_status != IF_ACTIVE) continue; @@ -597,6 +598,7 @@ void receive_bat_packet(struct ethhdr *ethhdr, if (compare_orig(ethhdr->h_source, broadcast_addr)) is_broadcast = 1; } + rcu_read_unlock(); if (batman_packet->version != COMPAT_VERSION) { bat_dbg(DBG_BATMAN, bat_priv,