Jakub Sitnicki 5cf65922bb flow_dissector: Drop BPF flow dissector prog ref on netns cleanup ... When attaching a flow dissector program to a network namespace with bpf(BPF_PROG_ATTACH, ...) we grab a reference to bpf_prog. If netns gets destroyed while a flow dissector is still attached, and there are no other references to the prog, we leak the reference and the program remains loaded. Leak can be reproduced by running flow dissector tests from selftests/bpf: # bpftool prog list # ./test_flow_dissector.sh ... selftests: test_flow_dissector [PASS] # bpftool prog list 4: flow_dissector name _dissect tag e314084d332a5338 gpl loaded_at 2020-05-20T18:50:53+0200 uid 0 xlated 552B jited 355B memlock 4096B map_ids 3,4 btf_id 4 # Fix it by detaching the flow dissector program when netns is going away. Fixes: d58e468b11 ("flow_dissector: implements flow dissector BPF hook") Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Reviewed-by: Stanislav Fomichev <sdf@google.com> Link: https://lore.kernel.org/bpf/20200521083435.560256-1-jakub@cloudflare.com		2020-05-21 17:52:45 -07:00
..
bpf_sk_storage.c
datagram.c
datagram.h
dev_addr_lists.c
dev_ioctl.c
dev.c	__netif_receive_skb_core: pass skb by reference	2020-05-19 15:38:00 -07:00
devlink.c	devlink: Fix reporter's recovery condition	2020-05-04 10:40:39 -07:00
drop_monitor.c	drop_monitor: work around gcc-10 stringop-overflow warning	2020-05-01 15:45:16 -07:00
dst_cache.c
dst.c
failover.c
fib_notifier.c
fib_rules.c
filter.c	bpf, sockmap: msg_pop_data can incorrecty set an sge length	2020-05-06 00:22:15 +02:00
flow_dissector.c	flow_dissector: Drop BPF flow dissector prog ref on netns cleanup	2020-05-21 17:52:45 -07:00
flow_offload.c
gen_estimator.c
gen_stats.c
gro_cells.c
hwbm.c
link_watch.c
lwt_bpf.c
lwtunnel.c
Makefile
neighbour.c	neigh: send protocol value in neighbor create notification	2020-05-05 13:38:59 -07:00
net_namespace.c
net-procfs.c
net-sysfs.c
net-sysfs.h
net-traces.c
netclassid_cgroup.c	cgroup, netclassid: remove double cond_resched	2020-04-21 15:44:30 -07:00
netevent.c
netpoll.c
netprio_cgroup.c	netprio_cgroup: Fix unlimited memory leak of v2 cgroups	2020-05-09 20:59:21 -07:00
page_pool.c
pktgen.c
ptp_classifier.c
request_sock.c
rtnetlink.c
scm.c
secure_seq.c
skbuff.c
skmsg.c
sock_diag.c
sock_map.c
sock_reuseport.c
sock.c	net: remove obsolete comment	2020-04-25 20:49:32 -07:00
stream.c
sysctl_net_core.c
timestamping.c
tso.c
utils.c
xdp.c