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linux/net/bridge
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Eric Woudstra 7043c73a64 bridge: br_vlan_fill_forward_path_pvid: use br_vlan_group_rcu() 
[ Upstream commit bbf0c98b3a ]

net/bridge/br_private.h:1627 suspicious rcu_dereference_protected() usage!
other info that might help us debug this:

rcu_scheduler_active = 2, debug_locks = 1
7 locks held by socat/410:
 #0: ffff88800d7a9c90 (sk_lock-AF_INET){+.+.}-{0:0}, at: inet_stream_connect+0x43/0xa0
 #1: ffffffff9a779900 (rcu_read_lock){....}-{1:3}, at: __ip_queue_xmit+0x62/0x1830
 [..]
 #6: ffffffff9a779900 (rcu_read_lock){....}-{1:3}, at: nf_hook.constprop.0+0x8a/0x440

Call Trace:
 lockdep_rcu_suspicious.cold+0x4f/0xb1
 br_vlan_fill_forward_path_pvid+0x32c/0x410 [bridge]
 br_fill_forward_path+0x7a/0x4d0 [bridge]

Use to correct helper, non _rcu variant requires RTNL mutex.

Fixes: bcf2766b13 ("net: bridge: resolve forwarding path for VLAN tag actions in bridge devices")
Signed-off-by: Eric Woudstra <ericwouds@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-10-19 16:23:09 +02:00
..
netfilter netfilter: bridge: Move specific fragmented packet to slow_path instead of dropping it 2025-06-27 11:07:10 +01:00
br.c net: bridge: mst: Multiple Spanning Tree (MST) mode 2022-03-17 16:49:57 -07:00
br_arp_nd_proxy.c neighbour: annotate lockless accesses to n->nud_state 2023-10-10 22:00:42 +02:00
br_cfm.c bridge: cfm: remove redundant return 2021-06-22 10:35:15 -07:00
br_cfm_netlink.c bridge: cfm: fix enum typo in br_cc_ccm_tx_parse 2024-02-05 20:12:54 +00:00
br_device.c net: bridge: xmit: make sure we have at least eth header len bytes 2024-06-12 11:03:32 +02:00
br_fdb.c net: bridge: br_fdb_external_learn_add(): always set EXT_LEARN 2024-09-12 11:10:22 +02:00
br_forward.c net: bridge: mst: Check vlan state for egress decision 2024-08-03 08:49:09 +02:00
br_if.c net: bridge: keep ports without IFF_UNICAST_FLT in BR_PROMISC mode 2023-07-19 16:22:04 +02:00
br_input.c netfilter: br_netfilter: skip conntrack input hook for promisc packets 2024-04-27 17:07:07 +02:00
br_ioctl.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-12-31 14:35:40 +00:00
br_mdb.c net: bridge: allow add/remove permanent mdb entries on disabled ports 2022-06-15 09:35:21 +01:00
br_mrp.c net: bridge: mrp: Update the Test frames for MRA 2021-06-28 15:46:10 -07:00
br_mrp_netlink.c bridge: mrp: Use hlist_head instead of list_head for mrp 2020-11-09 16:42:12 -08:00
br_mrp_switchdev.c bridge: mrp: Extend br_mrp_switchdev to detect better the errors 2021-02-16 14:47:46 -08:00
br_mst.c net: bridge: mcast: update multicast contex when vlan state is changed 2025-06-27 11:07:34 +01:00
br_multicast.c net: bridge: fix soft lockup in br_multicast_query_expired() 2025-08-28 16:26:17 +02:00
br_multicast_eht.c net: bridge: multicast: use multicast contexts instead of bridge or port 2021-07-20 05:41:19 -07:00
br_netfilter_hooks.c netfilter: br_netfilter: do not check confirmed bit in br_nf_local_in() after confirm 2025-09-09 18:54:13 +02:00
br_netfilter_ipv6.c netfilter: bridge: replace physindev with physinif in nf_bridge_info 2024-01-25 15:27:51 -08:00
br_netlink.c net-sysfs: convert dev->operstate reads to lockless ones 2024-05-17 11:56:13 +02:00
br_netlink_tunnel.c net: bridge: notify on vlan tunnel changes done via the old api 2020-07-12 15:18:24 -07:00
br_nf_core.c bridge: netfilter: Fix forwarding of fragmented packets 2025-06-04 14:40:19 +02:00
br_private.h net: bridge: fix soft lockup in br_multicast_query_expired() 2025-08-28 16:26:17 +02:00
br_private_cfm.h bridge: cfm: Kernel space implementation of CFM. CCM frame RX added. 2020-10-29 18:39:43 -07:00
br_private_mcast_eht.h net: bridge: multicast: use multicast contexts instead of bridge or port 2021-07-20 05:41:19 -07:00
br_private_mrp.h net: bridge: mrp: Update the Test frames for MRA 2021-06-28 15:46:10 -07:00
br_private_stp.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
br_private_tunnel.h bridge: always declare tunnel functions 2023-05-24 17:32:48 +01:00
br_stp.c net: bridge: mst: Multiple Spanning Tree (MST) mode 2022-03-17 16:49:57 -07:00
br_stp_bpdu.c net: bridge: add STP xstats 2019-12-14 20:02:36 -08:00
br_stp_if.c Revert "bridge: Add extack warning when enabling STP in netns." 2023-09-13 09:42:20 +02:00
br_stp_timer.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
br_switchdev.c net: bridge: Do not offload IGMP/MLD messages 2025-07-24 08:51:53 +02:00
br_sysfs_br.c bridge: Fix flushing of dynamic FDB entries 2022-11-02 20:47:09 -07:00
br_sysfs_if.c bridge: move from strlcpy with unused retval to strscpy 2022-08-22 17:57:30 -07:00
br_vlan.c bridge: br_vlan_fill_forward_path_pvid: use br_vlan_group_rcu() 2025-10-19 16:23:09 +02:00
br_vlan_options.c net: bridge: mst: Allow changing a VLAN's MSTI 2022-03-17 16:49:57 -07:00
br_vlan_tunnel.c net: bridge: change return type of br_handle_ingress_vlan_tunnel 2021-08-24 16:51:09 -07:00
Kconfig bridge: cfm: Add BRIDGE_CFM to Kconfig. 2020-10-29 18:39:43 -07:00
Makefile net: bridge: mst: Multiple Spanning Tree (MST) mode 2022-03-17 16:49:57 -07:00