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batman-adv: Merge bugfixes from 2020.3
* Avoid uninitialized chaddr when handling DHCP * Fix own OGM check in aggregated OGMs * bla: use netif_rx_ni when not in interrupt context Signed-off-by: Sven Eckelmann <sven@narfation.org>
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Sven Eckelmann
parent
017d89d569
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6dea537c07
@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
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PKG_NAME:=batman-adv
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PKG_VERSION:=2019.2
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PKG_RELEASE:=8
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PKG_RELEASE:=9
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PKG_HASH:=70c3f6a6cf88d2b25681a76768a52ed92d9fe992ba8e358368b6a8088757adc8
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PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
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@ -0,0 +1,42 @@
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From: Sven Eckelmann <sven@narfation.org>
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Date: Wed, 22 Jul 2020 20:49:23 +0200
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Subject: batman-adv: Avoid uninitialized chaddr when handling DHCP
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The gateway client code can try to optimize the delivery of DHCP packets to
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avoid broadcasting them through the whole mesh. But also transmissions to
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the client can be optimized by looking up the destination via the chaddr of
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the DHCP packet.
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But the chaddr is currently only done when chaddr is fully inside the
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non-paged area of the skbuff. Otherwise it will not be initialized and the
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unoptimized path should have been taken.
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But the implementation didn't handle this correctly. It didn't retrieve the
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correct chaddr but still tried to perform the TT lookup with this
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uninitialized memory.
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Reported-by: syzbot+ab16e463b903f5a37036@syzkaller.appspotmail.com
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Fixes: 2d5b555644b2 ("batman-adv: send every DHCP packet as bat-unicast")
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
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Acked-by: Antonio Quartulli <a@unstable.cc>
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
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Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/fcdf008ffd749246632d1f9423163af5dc3f8c7f
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diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
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index 47df4c678988613f7410acb96889558eabdf396d..89c9097007c3a575836018df9e0fe97731a19619 100644
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--- a/net/batman-adv/gateway_client.c
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+++ b/net/batman-adv/gateway_client.c
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@@ -703,8 +703,10 @@ batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len,
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chaddr_offset = *header_len + BATADV_DHCP_CHADDR_OFFSET;
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/* store the client address if the message is going to a client */
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- if (ret == BATADV_DHCP_TO_CLIENT &&
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- pskb_may_pull(skb, chaddr_offset + ETH_ALEN)) {
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+ if (ret == BATADV_DHCP_TO_CLIENT) {
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+ if (!pskb_may_pull(skb, chaddr_offset + ETH_ALEN))
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+ return BATADV_DHCP_NO;
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+
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/* check if the DHCP packet carries an Ethernet DHCP */
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p = skb->data + *header_len + BATADV_DHCP_HTYPE_OFFSET;
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if (*p != BATADV_DHCP_HTYPE_ETHERNET)
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@ -0,0 +1,59 @@
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From: Linus Lüssing <linus.luessing@c0d3.blue>
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Date: Fri, 31 Jul 2020 00:22:55 +0200
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Subject: batman-adv: Fix own OGM check in aggregated OGMs
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The own OGM check is currently misplaced and can lead to the following
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issues:
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For one thing we might receive an aggregated OGM from a neighbor node
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which has our own OGM in the first place. We would then not only skip
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our own OGM but erroneously also any other, following OGM in the
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aggregate.
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For another, we might receive an OGM aggregate which has our own OGM in
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a place other then the first one. Then we would wrongly not skip this
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OGM, leading to populating the orginator and gateway table with ourself.
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The latter seems to not only be a cosmetic issue, but there were reports
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that this causes issues with various subsystems of batman-adv, too. For
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instance there were reports about issues with DAT and either disabling
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DAT or aggregation seemed to solve it.
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Fixing these issues by applying the own OGM check not on the first OGM
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in an aggregate but for each OGM in an aggregate instead.
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Fixes: 667996ebeab ("batman-adv: OGMv2 - implement originators logic")
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Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
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Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/d41cc7cb62c184b2fb8ab97fda45815918200001
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diff --git a/net/batman-adv/bat_v_ogm.c b/net/batman-adv/bat_v_ogm.c
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index 9c42152829c976a2fb6c4395ab4d17c34fe47682..330204a73a0d3d9e4083656b82ff7b9d73a48fdc 100644
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--- a/net/batman-adv/bat_v_ogm.c
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+++ b/net/batman-adv/bat_v_ogm.c
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@@ -704,6 +704,12 @@ static void batadv_v_ogm_process(const struct sk_buff *skb, int ogm_offset,
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ntohl(ogm_packet->seqno), ogm_throughput, ogm_packet->ttl,
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ogm_packet->version, ntohs(ogm_packet->tvlv_len));
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+ if (batadv_is_my_mac(bat_priv, ogm_packet->orig)) {
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+ batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
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+ "Drop packet: originator packet from ourself\n");
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+ return;
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+ }
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+
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/* If the throughput metric is 0, immediately drop the packet. No need
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* to create orig_node / neigh_node for an unusable route.
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*/
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@@ -831,11 +837,6 @@ int batadv_v_ogm_packet_recv(struct sk_buff *skb,
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if (batadv_is_my_mac(bat_priv, ethhdr->h_source))
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goto free_skb;
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- ogm_packet = (struct batadv_ogm2_packet *)skb->data;
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-
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- if (batadv_is_my_mac(bat_priv, ogm_packet->orig))
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- goto free_skb;
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-
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batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX);
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batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES,
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skb->len + ETH_HLEN);
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@ -0,0 +1,31 @@
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From: Jussi Kivilinna <jussi.kivilinna@haltian.com>
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Date: Tue, 18 Aug 2020 17:46:10 +0300
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Subject: batman-adv: bla: use netif_rx_ni when not in interrupt context
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batadv_bla_send_claim() gets called from worker thread context through
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batadv_bla_periodic_work(), thus netif_rx_ni needs to be used in that
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case. This fixes "NOHZ: local_softirq_pending 08" log messages seen
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when batman-adv is enabled.
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Fixes: a9ce0dc43e2c ("batman-adv: add basic bridge loop avoidance code")
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Signed-off-by: Jussi Kivilinna <jussi.kivilinna@haltian.com>
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Signed-off-by: Sven Eckelmann <sven@narfation.org>
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Origin: upstream, https://git.open-mesh.org/batman-adv.git/commit/3747f81a1380b65740fc52fc71c7a3af4c6e49de
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diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
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index 663a53b6d36e65508b4296d86cecdd808c653836..5f6309ade1ea19f6a0bd27e8cbc5fcfba8f7dda5 100644
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--- a/net/batman-adv/bridge_loop_avoidance.c
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+++ b/net/batman-adv/bridge_loop_avoidance.c
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@@ -437,7 +437,10 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac,
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batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
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skb->len + ETH_HLEN);
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- netif_rx(skb);
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+ if (in_interrupt())
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+ netif_rx(skb);
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+ else
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+ netif_rx_ni(skb);
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out:
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if (primary_if)
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batadv_hardif_put(primary_if);
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