From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
stable@vger.kernel.org,
"Linus Lüssing" <linus.luessing@c0d3.blue>,
"Sven Eckelmann" <sven@narfation.org>,
"Simon Wunderlich" <sw@simonwunderlich.de>
Subject: [PATCH 5.15 27/72] batman-adv: mcast: dont send link-local multicast to mcast routers
Date: Mon, 10 Jan 2022 08:23:04 +0100 [thread overview]
Message-ID: <20220110071822.486699749@linuxfoundation.org> (raw)
In-Reply-To: <20220110071821.500480371@linuxfoundation.org>
From: Linus Lüssing <linus.luessing@c0d3.blue>
commit 938f2e0b57ffe8a6df71e1e177b2978b1b33fe5e upstream.
The addition of routable multicast TX handling introduced a
bug/regression for packets with a link-local multicast destination:
These packets would be sent to all batman-adv nodes with a multicast
router and to all batman-adv nodes with an old version without multicast
router detection.
This even disregards the batman-adv multicast fanout setting, which can
potentially lead to an unwanted, high number of unicast transmissions or
even congestion.
Fixing this by avoiding to send link-local multicast packets to nodes in
the multicast router list.
Fixes: 11d458c1cb9b ("batman-adv: mcast: apply optimizations for routable packets, too")
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/batman-adv/multicast.c | 15 ++++++++++-----
net/batman-adv/multicast.h | 10 ++++++----
net/batman-adv/soft-interface.c | 7 +++++--
3 files changed, 21 insertions(+), 11 deletions(-)
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -1339,6 +1339,7 @@ batadv_mcast_forw_rtr_node_get(struct ba
* @bat_priv: the bat priv with all the soft interface information
* @skb: The multicast packet to check
* @orig: an originator to be set to forward the skb to
+ * @is_routable: stores whether the destination is routable
*
* Return: the forwarding mode as enum batadv_forw_mode and in case of
* BATADV_FORW_SINGLE set the orig to the single originator the skb
@@ -1346,17 +1347,16 @@ batadv_mcast_forw_rtr_node_get(struct ba
*/
enum batadv_forw_mode
batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
- struct batadv_orig_node **orig)
+ struct batadv_orig_node **orig, int *is_routable)
{
int ret, tt_count, ip_count, unsnoop_count, total_count;
bool is_unsnoopable = false;
unsigned int mcast_fanout;
struct ethhdr *ethhdr;
- int is_routable = 0;
int rtr_count = 0;
ret = batadv_mcast_forw_mode_check(bat_priv, skb, &is_unsnoopable,
- &is_routable);
+ is_routable);
if (ret == -ENOMEM)
return BATADV_FORW_NONE;
else if (ret < 0)
@@ -1369,7 +1369,7 @@ batadv_mcast_forw_mode(struct batadv_pri
ip_count = batadv_mcast_forw_want_all_ip_count(bat_priv, ethhdr);
unsnoop_count = !is_unsnoopable ? 0 :
atomic_read(&bat_priv->mcast.num_want_all_unsnoopables);
- rtr_count = batadv_mcast_forw_rtr_count(bat_priv, is_routable);
+ rtr_count = batadv_mcast_forw_rtr_count(bat_priv, *is_routable);
total_count = tt_count + ip_count + unsnoop_count + rtr_count;
@@ -1689,6 +1689,7 @@ batadv_mcast_forw_want_rtr(struct batadv
* @bat_priv: the bat priv with all the soft interface information
* @skb: the multicast packet to transmit
* @vid: the vlan identifier
+ * @is_routable: stores whether the destination is routable
*
* Sends copies of a frame with multicast destination to any node that signaled
* interest in it, that is either via the translation table or the according
@@ -1701,7 +1702,7 @@ batadv_mcast_forw_want_rtr(struct batadv
* is neither IPv4 nor IPv6. NET_XMIT_SUCCESS otherwise.
*/
int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
- unsigned short vid)
+ unsigned short vid, int is_routable)
{
int ret;
@@ -1717,12 +1718,16 @@ int batadv_mcast_forw_send(struct batadv
return ret;
}
+ if (!is_routable)
+ goto skip_mc_router;
+
ret = batadv_mcast_forw_want_rtr(bat_priv, skb, vid);
if (ret != NET_XMIT_SUCCESS) {
kfree_skb(skb);
return ret;
}
+skip_mc_router:
consume_skb(skb);
return ret;
}
--- a/net/batman-adv/multicast.h
+++ b/net/batman-adv/multicast.h
@@ -43,7 +43,8 @@ enum batadv_forw_mode {
enum batadv_forw_mode
batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
- struct batadv_orig_node **mcast_single_orig);
+ struct batadv_orig_node **mcast_single_orig,
+ int *is_routable);
int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
struct sk_buff *skb,
@@ -51,7 +52,7 @@ int batadv_mcast_forw_send_orig(struct b
struct batadv_orig_node *orig_node);
int batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
- unsigned short vid);
+ unsigned short vid, int is_routable);
void batadv_mcast_init(struct batadv_priv *bat_priv);
@@ -68,7 +69,8 @@ void batadv_mcast_purge_orig(struct bata
static inline enum batadv_forw_mode
batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
- struct batadv_orig_node **mcast_single_orig)
+ struct batadv_orig_node **mcast_single_orig,
+ int *is_routable)
{
return BATADV_FORW_ALL;
}
@@ -85,7 +87,7 @@ batadv_mcast_forw_send_orig(struct batad
static inline int
batadv_mcast_forw_send(struct batadv_priv *bat_priv, struct sk_buff *skb,
- unsigned short vid)
+ unsigned short vid, int is_routable)
{
kfree_skb(skb);
return NET_XMIT_DROP;
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -198,6 +198,7 @@ static netdev_tx_t batadv_interface_tx(s
int gw_mode;
enum batadv_forw_mode forw_mode = BATADV_FORW_SINGLE;
struct batadv_orig_node *mcast_single_orig = NULL;
+ int mcast_is_routable = 0;
int network_offset = ETH_HLEN;
__be16 proto;
@@ -300,7 +301,8 @@ static netdev_tx_t batadv_interface_tx(s
send:
if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) {
forw_mode = batadv_mcast_forw_mode(bat_priv, skb,
- &mcast_single_orig);
+ &mcast_single_orig,
+ &mcast_is_routable);
if (forw_mode == BATADV_FORW_NONE)
goto dropped;
@@ -359,7 +361,8 @@ send:
ret = batadv_mcast_forw_send_orig(bat_priv, skb, vid,
mcast_single_orig);
} else if (forw_mode == BATADV_FORW_SOME) {
- ret = batadv_mcast_forw_send(bat_priv, skb, vid);
+ ret = batadv_mcast_forw_send(bat_priv, skb, vid,
+ mcast_is_routable);
} else {
if (batadv_dat_snoop_outgoing_arp_request(bat_priv,
skb))
next prev parent reply other threads:[~2022-01-10 7:41 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-10 7:22 [PATCH 5.15 00/72] 5.15.14-rc1 review Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 01/72] fscache_cookie_enabled: check cookie is valid before accessing it Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 02/72] selftests: x86: fix [-Wstringop-overread] warn in test_process_vm_readv() Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 03/72] tracing: Fix check for trace_percpu_buffer validity in get_trace_buf() Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 04/72] tracing: Tag trace_percpu_buffer as a percpu pointer Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 05/72] Revert "RDMA/mlx5: Fix releasing unallocated memory in dereg MR flow" Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 06/72] ieee802154: atusb: fix uninit value in atusb_set_extended_addr Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 07/72] i40e: Fix to not show opcode msg on unsuccessful VF MAC change Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 08/72] iavf: Fix limit of total number of queues to active queues of VF Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 09/72] RDMA/core: Dont infoleak GRH fields Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 10/72] Revert "net: usb: r8152: Add MAC passthrough support for more Lenovo Docks" Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 11/72] netrom: fix copying in user data in nr_setsockopt Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 12/72] RDMA/uverbs: Check for null return of kmalloc_array Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 13/72] mac80211: initialize variable have_higher_than_11mbit Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 14/72] mac80211: mesh: embedd mesh_paths and mpp_paths into ieee80211_if_mesh Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 15/72] sfc: The RX page_ring is optional Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 16/72] i40e: fix use-after-free in i40e_sync_filters_subtask() Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 17/72] i40e: Fix for displaying message regarding NVM version Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 18/72] i40e: Fix incorrect netdevs real number of RX/TX queues Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 19/72] ftrace/samples: Add missing prototypes direct functions Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 20/72] ipv4: Check attribute length for RTA_GATEWAY in multipath route Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 21/72] ipv4: Check attribute length for RTA_FLOW " Greg Kroah-Hartman
2022-01-10 7:22 ` [PATCH 5.15 22/72] ipv6: Check attribute length for RTA_GATEWAY " Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 23/72] ipv6: Check attribute length for RTA_GATEWAY when deleting " Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 24/72] lwtunnel: Validate RTA_ENCAP_TYPE attribute length Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 25/72] selftests: net: udpgro_fwd.sh: explicitly checking the available ping feature Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 26/72] sctp: hold endpoint before calling cb in sctp_transport_lookup_process Greg Kroah-Hartman
2022-01-10 7:23 ` Greg Kroah-Hartman [this message]
2022-01-10 7:23 ` [PATCH 5.15 28/72] sch_qfq: prevent shift-out-of-bounds in qfq_init_qdisc Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 29/72] net: ena: Fix undefined state when tx request id is out of bounds Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 30/72] net: ena: Fix wrong rx request id by resetting device Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 31/72] net: ena: Fix error handling when calculating max IO queues number Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 32/72] md/raid1: fix missing bitmap update w/o WriteMostly devices Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 33/72] EDAC/i10nm: Release mdev/mbase when failing to detect HBM Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 34/72] KVM: x86: Check for rmaps allocation Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 35/72] cgroup: Use open-time credentials for process migraton perm checks Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 36/72] cgroup: Allocate cgroup_file_ctx for kernfs_open_file->priv Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 37/72] cgroup: Use open-time cgroup namespace for process migration perm checks Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 38/72] Revert "i2c: core: support bus regulator controlling in adapter" Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 39/72] i2c: mpc: Avoid out of bounds memory access Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 40/72] xfs: map unwritten blocks in XFS_IOC_{ALLOC,FREE}SP just like fallocate Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 41/72] power: supply: core: Break capacity loop Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 42/72] power: reset: ltc2952: Fix use of floating point literals Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 43/72] reset: renesas: Fix Runtime PM usage Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 44/72] rndis_host: support Hytera digital radios Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 45/72] gpio: gpio-aspeed-sgpio: Fix wrong hwirq base in irq handler Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 46/72] net ticp:fix a kernel-infoleak in __tipc_sendmsg() Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 47/72] phonet: refcount leak in pep_sock_accep Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 48/72] fbdev: fbmem: add a helper to determine if an aperture is used by a fw fb Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 49/72] drm/amdgpu: disable runpm if we are the primary adapter Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 50/72] power: bq25890: Enable continuous conversion for ADC at charging Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 51/72] ipv6: Continue processing multipath route even if gateway attribute is invalid Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 52/72] ipv6: Do cleanup if attribute validation fails in multipath route Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 53/72] auxdisplay: charlcd: checking for pointer reference before dereferencing Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 54/72] drm/amdgpu: fix dropped backing store handling in amdgpu_dma_buf_move_notify Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 55/72] drm/amd/pm: Fix xgmi link control on aldebaran Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 56/72] usb: mtu3: fix interval value for intr and isoc Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 57/72] scsi: libiscsi: Fix UAF in iscsi_conn_get_param()/iscsi_conn_teardown() Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 58/72] ip6_vti: initialize __ip6_tnl_parm struct in vti6_siocdevprivate Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 59/72] net: udp: fix alignment problem in udp4_seq_show() Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 60/72] atlantic: Fix buff_ring OOB in aq_ring_rx_clean Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 61/72] drm/amd/pm: skip setting gfx cgpg in the s0ix suspend-resume Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 62/72] drm/amdgpu: always reset the asic in suspend (v2) Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 63/72] drm/amdgpu: put SMU into proper state on runpm suspending for BOCO capable platform Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 64/72] mISDN: change function names to avoid conflicts Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 65/72] drm/amd/display: fix B0 TMDS deepcolor no dislay issue Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 66/72] drm/amd/display: Added power down for DCN10 Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 67/72] ipv6: raw: check passed optlen before reading Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 68/72] userfaultfd/selftests: fix hugetlb area allocations Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 69/72] ARM: dts: gpio-ranges property is now required Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 70/72] Input: zinitix - make sure the IRQ is allocated before it gets enabled Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 71/72] Revert "drm/amdgpu: stop scheduler when calling hw_fini (v2)" Greg Kroah-Hartman
2022-01-10 7:23 ` [PATCH 5.15 72/72] drm/amd/pm: keep the BACO feature enabled for suspend Greg Kroah-Hartman
2022-01-10 11:49 ` [PATCH 5.15 00/72] 5.15.14-rc1 review Jon Hunter
2022-01-10 14:30 ` Jeffrin Jose T
2022-01-10 20:16 ` Florian Fainelli
2022-01-10 21:17 ` Fox Chen
2022-01-10 22:55 ` Shuah Khan
2022-01-10 23:50 ` Guenter Roeck
2022-01-11 3:48 ` Zan Aziz
2022-01-11 5:14 ` Naresh Kamboju
2022-01-11 7:35 ` Rudi Heitbaum
2022-01-11 12:41 ` Sudip Mukherjee
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