Dongdong Wang d27b8a3109 lwt: Disable BH too in run_lwt_bpf() ... [ Upstream commit d9054a1ff5 ] The per-cpu bpf_redirect_info is shared among all skb_do_redirect() and BPF redirect helpers. Callers on RX path are all in BH context, disabling preemption is not sufficient to prevent BH interruption. In production, we observed strange packet drops because of the race condition between LWT xmit and TC ingress, and we verified this issue is fixed after we disable BH. Although this bug was technically introduced from the beginning, that is commit 3a0af8fd61 ("bpf: BPF for lightweight tunnel infrastructure"), at that time call_rcu() had to be call_rcu_bh() to match the RCU context. So this patch may not work well before RCU flavor consolidation has been completed around v5.0. Update the comments above the code too, as call_rcu() is now BH friendly. Signed-off-by: Dongdong Wang <wangdongdong.6@bytedance.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Reviewed-by: Cong Wang <cong.wang@bytedance.com> Link: https://lore.kernel.org/bpf/20201205075946.497763-1-xiyou.wangcong@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-12-30 11:26:06 +01:00
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datagram.c	net: add READ_ONCE() annotation in __skb_wait_for_more_packets()	2019-11-10 11:27:49 +01:00
dev_addr_lists.c	net: change the comment of dev_mc_init	2018-04-19 12:58:20 -04:00
dev_ioctl.c	net: remove redundant input checks in SIOCSIFTXQLEN case of dev_ifsioc	2018-07-24 11:36:15 -07:00
dev.c	net: disable netpoll on fresh napis	2020-09-12 13:40:23 +02:00
devlink.c	devlink: Add missing genlmsg_cancel() in devlink_nl_sb_port_pool_fill()	2020-11-24 13:27:16 +01:00
drop_monitor.c	drop_monitor: work around gcc-10 stringop-overflow warning	2020-05-20 08:18:33 +02:00
dst_cache.c	net: core: dst_cache_set_ip6: Rename 'addr' parameter to 'saddr' for consistency	2018-03-05 12:52:45 -05:00
dst.c	netfilter: nf_tables: add tunnel support	2018-08-03 21:12:12 +02:00
ethtool.c	ethtool: reduce stack usage with clang	2020-01-17 19:46:55 +01:00
failover.c	failover: allow name change on IFF_UP slave interfaces	2019-04-27 09:36:30 +02:00
fib_notifier.c	net: Fix fib notifer to return errno	2018-03-29 14:10:30 -04:00
fib_rules.c	net: fib_rules: Correctly set table field when table number exceeds 8 bits	2020-03-05 16:42:15 +01:00
filter.c	bpf: Fix clobbering of r2 in bpf_gen_ld_abs	2020-10-01 13:14:52 +02:00
flow_dissector.c	net: dsa: fix flow dissection on Tx path	2019-12-21 10:57:11 +01:00
gen_estimator.c	net: core: protect rate estimator statistics pointer with lock	2018-08-11 12:37:10 -07:00
gen_stats.c	net: sched: put back q.qlen into a single location	2019-03-10 07:17:16 +01:00
gro_cells.c	gro_cells: make sure device is up in gro_cells_receive()	2019-03-19 13:12:38 +01:00
hwbm.c	net: hwbm: Fix unbalanced spinlock in error case	2016-05-25 12:35:09 -07:00
link_watch.c	net: link_watch: mark bonding link events urgent	2018-01-23 19:43:30 -05:00
lwt_bpf.c	lwt: Disable BH too in run_lwt_bpf()	2020-12-30 11:26:06 +01:00
lwtunnel.c	ipv6: sr: define core operations for seg6local lightweight tunnel	2017-08-07 14:16:22 -07:00
Makefile	net: Introduce generic failover module	2018-05-28 22:59:54 -04:00
neighbour.c	neigh_stat_seq_next() should increase position index	2020-10-01 13:14:29 +02:00
net_namespace.c	net/net_namespace: Check the return value of register_pernet_subsys()	2019-12-05 09:20:51 +01:00
net-procfs.c	proc: introduce proc_create_net{,_data}	2018-05-16 07:24:30 +02:00
net-sysfs.c	net-sysfs: add a newline when printing 'tx_timeout' by sysfs	2020-07-31 18:37:47 +02:00
net-sysfs.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
net-traces.c	net/ipv6: Udate fib6_table_lookup tracepoint	2018-05-24 23:01:15 -04:00
netclassid_cgroup.c	cgroup, netclassid: remove double cond_resched	2020-05-10 10:30:12 +02:00
netevent.c	netevent: remove automatic variable in register_netevent_notifier()	2015-05-31 00:03:21 -07:00
netpoll.c	net: Have netpoll bring-up DSA management interface	2020-11-24 13:27:17 +01:00
netprio_cgroup.c	netprio_cgroup: Fix unlimited memory leak of v2 cgroups	2020-05-20 08:18:38 +02:00
page_pool.c	net/page_pool: Fix inconsistent lock state warning	2018-07-19 23:23:01 -07:00
pktgen.c	pktgen: do not sleep with the thread lock held.	2019-06-11 12:20:49 +02:00
ptp_classifier.c	ptp: Change ptp_class to a proper bitmask	2015-11-03 11:08:22 -05:00
request_sock.c	ipv4: Namespaceify tcp_max_syn_backlog knob	2016-12-29 11:38:31 -05:00
rtnetlink.c	rtnetlink: Fix memory(net_device) leak when ->newlink fails	2020-07-31 18:37:49 +02:00
scm.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/user.h>	2017-03-02 08:42:29 +01:00
secure_seq.c	infiniband: i40iw, nes: don't use wall time for TCP sequence numbers	2018-07-11 12:10:19 -06:00
skbuff.c	sock: set sk_err to ee_errno on dequeue from errq	2020-12-08 10:18:52 +01:00
sock_diag.c	net: sock_diag: Fix spectre v1 gadget in __sock_diag_cmd()	2018-08-14 10:01:24 -07:00
sock_reuseport.c	udp: Copy has_conns in reuseport_grow().	2020-07-31 18:37:48 +02:00
sock.c	net/compat: Add missing sock updates for SCM_RIGHTS	2020-08-21 11:05:32 +02:00
stream.c	tcp: make sure EPOLLOUT wont be missed	2019-09-06 10:22:07 +02:00
sysctl_net_core.c	bpf: Check correct cred for CAP_SYSLOG in bpf_dump_raw_ok()	2020-07-16 08:17:27 +02:00
timestamping.c	net: skb_defer_rx_timestamp should check for phydev before setting up classify	2015-07-09 14:17:15 -07:00
tso.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
utils.c	net: Fix skb->csum update in inet_proto_csum_replace16().	2020-02-05 14:43:53 +00:00
xdp.c	net/xdp: Fix suspicious RCU usage warning	2018-08-16 21:55:21 +02:00