Eric Dumazet 35306eb238 af_unix: fix races in sk_peer_pid and sk_peer_cred accesses ... Jann Horn reported that SO_PEERCRED and SO_PEERGROUPS implementations are racy, as af_unix can concurrently change sk_peer_pid and sk_peer_cred. In order to fix this issue, this patch adds a new spinlock that needs to be used whenever these fields are read or written. Jann also pointed out that l2cap_sock_get_peer_pid_cb() is currently reading sk->sk_peer_pid which makes no sense, as this field is only possibly set by AF_UNIX sockets. We will have to clean this in a separate patch. This could be done by reverting b48596d1dc "Bluetooth: L2CAP: Add get_peer_pid callback" or implementing what was truly expected. Fixes: 109f6e39fa ("af_unix: Allow SO_PEERCRED to work across namespaces.") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Jann Horn <jannh@google.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> Cc: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2021-09-30 14:18:40 +01:00
..
bpf_sk_storage.c	net: in_irq() cleanup	2021-08-13 14:09:19 -07:00
datagram.c	udp: fix skb_copy_and_csum_datagram with odd segment sizes	2021-02-04 18:56:56 -08:00
datagram.h
dev_addr_lists.c	net: dev_addr_list: handle first address in __hw_addr_add_ex	2021-09-30 13:29:09 +01:00
dev_ioctl.c	net: core: don't call SIOCBRADD/DELIF for non-bridge devices	2021-08-05 11:36:59 +01:00
dev.c	napi: fix race inside napi_enable	2021-09-20 09:41:29 +01:00
devlink.c	devlink: Clear whole devlink_flash_notify struct	2021-08-14 13:59:10 +01:00
drop_monitor.c	net: Remove redundant if statements	2021-08-05 13:27:50 +01:00
dst_cache.c
dst.c	net: Remove redundant if statements	2021-08-05 13:27:50 +01:00
failover.c
fib_notifier.c	net: fib_notifier: propagate extack down to the notifier block callback	2019-10-04 11:10:56 -07:00
fib_rules.c	memcg: enable accounting for IP address and routing-related objects	2021-07-20 06:00:38 -07:00
filter.c	bpf: tcp: Allow bpf-tcp-cc to call bpf_(get|set)sockopt	2021-08-25 17:40:35 -07:00
flow_dissector.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-07-31 09:14:46 -07:00
flow_offload.c	net: Fix offloading indirect devices dependency on qdisc order creation	2021-08-19 13:19:30 +01:00
gen_estimator.c	net_sched: gen_estimator: support large ewma log	2021-01-15 18:11:06 -08:00
gen_stats.c	docs: networking: convert gen_stats.txt to ReST	2020-04-28 14:39:46 -07:00
gro_cells.c	gro_cells: reduce number of synchronize_net() calls	2020-11-25 11:28:12 -08:00
hwbm.c
link_watch.c	net: linkwatch: fix failure to restore device state across suspend/resume	2021-08-11 14:43:16 -07:00
lwt_bpf.c	lwt_bpf: Replace preempt_disable() with migrate_disable()	2020-12-07 11:53:40 -08:00
lwtunnel.c	netfilter: add netfilter hooks to SRv6 data plane	2021-08-30 01:51:36 +02:00
Makefile	sock_map: Relax config dependency to CONFIG_NET	2021-07-15 18:17:49 -07:00
neighbour.c	net: Support filtering interfaces on no master	2021-08-10 16:03:34 -07:00
net_namespace.c	net: net_namespace: Optimize the code	2021-08-18 10:34:48 +01:00
net-procfs.c	net: procfs: add seq_puts() statement for dev_mcast	2021-08-18 10:13:20 +01:00
net-sysfs.c	net-sysfs: remove possible sleep from an RCU read-side critical section	2021-03-22 13:28:13 -07:00
net-sysfs.h	net-sysfs: add netdev_change_owner()	2020-02-26 20:07:25 -08:00
net-traces.c	tcp: add tracepoint for checksum errors	2021-05-14 15:26:03 -07:00
netclassid_cgroup.c	bpf, cgroups: Fix cgroup v2 fallback on v1/v2 mixed mode	2021-09-13 16:35:58 -07:00
netevent.c	net: core: Correct function name netevent_unregister_notifier() in the kerneldoc	2021-03-28 17:56:56 -07:00
netpoll.c	asm-generic/unaligned: Unify asm/unaligned.h around struct helper	2021-07-02 12:43:40 -07:00
netprio_cgroup.c	bpf, cgroups: Fix cgroup v2 fallback on v1/v2 mixed mode	2021-09-13 16:35:58 -07:00
page_pool.c	page_pool: use relaxed atomic for release side accounting	2021-08-24 10:46:31 +01:00
pktgen.c	pktgen: remove unused variable	2021-09-03 11:48:28 +01:00
ptp_classifier.c	bpf: Refactor BPF_PROG_RUN into a function	2021-08-17 00:45:07 +02:00
request_sock.c	tcp: add rcu protection around tp->fastopen_rsk	2019-10-13 10:13:08 -07:00
rtnetlink.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2021-08-26 17:57:57 -07:00
scm.c	memcg: enable accounting for scm_fp_list objects	2021-07-20 06:00:38 -07:00
secure_seq.c	crypto: lib/sha1 - remove unnecessary includes of linux/cryptohash.h	2020-05-08 15:32:17 +10:00
selftests.c	net: selftests: add MTU test	2021-07-22 00:52:04 -07:00
skbuff.c	skbuff: clean up inconsistent indenting	2021-09-03 11:51:26 +01:00
skmsg.c	bpf, sockmap: Fix memleak on ingress msg enqueue	2021-07-27 14:55:30 -07:00
sock_diag.c	bpf, net: Rework cookie generator as per-cpu one	2020-09-30 11:50:35 -07:00
sock_map.c	af_unix: Add unix_stream_proto for sockmap	2021-08-16 18:43:39 -07:00
sock_reuseport.c	tcp: Add stats for socket migration.	2021-06-23 12:56:08 -07:00
sock.c	af_unix: fix races in sk_peer_pid and sk_peer_cred accesses	2021-09-30 14:18:40 +01:00
stream.c	tcp: make sure EPOLLOUT wont be missed	2019-08-19 13:07:43 -07:00
sysctl_net_core.c	net: change netdev_unregister_timeout_secs min value to 1	2021-03-25 17:24:06 -07:00
timestamping.c	net: Introduce a new MII time stamping interface.	2019-12-25 19:51:33 -08:00
tso.c	net: tso: add UDP segmentation support	2020-06-18 20:46:23 -07:00
utils.c	net: Fix skb->csum update in inet_proto_csum_replace16().	2020-01-24 20:54:30 +01:00
xdp.c	xdp: Move the rxq_info.mem clearing to unreg_mem_model()	2021-06-28 23:07:59 +02:00