Changbin Du 4abfd597fe net: make get_net_ns return error if NET_NS is disabled ... [ Upstream commit ea6932d70e223e02fea3ae20a4feff05d7c1ea9a ] There is a panic in socket ioctl cmd SIOCGSKNS when NET_NS is not enabled. The reason is that nsfs tries to access ns->ops but the proc_ns_operations is not implemented in this case. [7.670023] Unable to handle kernel NULL pointer dereference at virtual address 00000010 [7.670268] pgd = 32b54000 [7.670544] [00000010] *pgd=00000000 [7.671861] Internal error: Oops: 5 [#1] SMP ARM [7.672315] Modules linked in: [7.672918] CPU: 0 PID: 1 Comm: systemd Not tainted 5.13.0-rc3-00375-g6799d4f2da49 #16 [7.673309] Hardware name: Generic DT based system [7.673642] PC is at nsfs_evict+0x24/0x30 [7.674486] LR is at clear_inode+0x20/0x9c The same to tun SIOCGSKNS command. To fix this problem, we make get_net_ns() return -EINVAL when NET_NS is disabled. Meanwhile move it to right place net/core/net_namespace.c. Signed-off-by: Changbin Du <changbin.du@gmail.com> Fixes: c62cce2cae ("net: add an ioctl to get a socket network namespace") Cc: Cong Wang <xiyou.wangcong@gmail.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: David Laight <David.Laight@ACULAB.COM> Cc: Christian Brauner <christian.brauner@ubuntu.com> Suggested-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-06-23 14:42:44 +02:00
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bpf_sk_storage.c
datagram.c	udp: fix skb_copy_and_csum_datagram with odd segment sizes	2021-02-17 11:02:28 +01:00
datagram.h
dev_addr_lists.c
dev_ioctl.c	net: fix dev_ifsioc_locked() race condition	2021-03-07 12:34:07 +01:00
dev.c	net: sched: fix tx action reschedule issue with stopped queue	2021-06-03 09:00:47 +02:00
devlink.c	devlink: Correct VIRTUAL port to not have phys_port attributes	2021-06-10 13:39:16 +02:00
drop_monitor.c	drop_monitor: Perform cleanup upon probe registration failure	2021-03-30 14:31:57 +02:00
dst_cache.c
dst.c	net, bpf: Fix ip6ip6 crash with collect_md populated skbs	2021-03-30 14:32:05 +02:00
failover.c
fib_notifier.c
fib_rules.c	fib: Return the correct errno code	2021-06-18 10:00:06 +02:00
filter.c	bpf: Set mac_len in bpf_skb_change_head	2021-06-03 09:00:49 +02:00
flow_dissector.c	flow_dissector: Fix out-of-bounds warning in __skb_flow_bpf_to_target()	2021-05-19 10:12:57 +02:00
flow_offload.c
gen_estimator.c	net_sched: gen_estimator: support large ewma log	2021-01-27 11:55:23 +01:00
gen_stats.c
gro_cells.c
hwbm.c
link_watch.c
lwt_bpf.c
lwtunnel.c
Makefile
neighbour.c	neighbour: allow NUD_NOARP entries to be forced GCed	2021-06-10 13:39:29 +02:00
net_namespace.c	net: make get_net_ns return error if NET_NS is disabled	2021-06-23 14:42:44 +02:00
net-procfs.c
net-sysfs.c	net-sysfs: take the rtnl lock when accessing xps_rxqs_map and num_tc	2021-01-12 20:18:11 +01:00
net-sysfs.h
net-traces.c
netclassid_cgroup.c
netevent.c
netpoll.c
netprio_cgroup.c
page_pool.c	mm: fix struct page layout on 32-bit systems	2021-05-19 10:13:17 +02:00
pktgen.c	pktgen: fix misuse of BUG_ON() in pktgen_thread_worker()	2021-03-07 12:34:09 +01:00
ptp_classifier.c
request_sock.c
rtnetlink.c	rtnetlink: Fix regression in bridge VLAN configuration	2021-06-23 14:42:42 +02:00
scm.c
secure_seq.c
skbuff.c	net: fix up truesize of cloned skb in skb_prepare_for_shift()	2021-03-07 12:34:05 +01:00
skmsg.c	bpf, sockmap: Fix incorrect fwd_alloc accounting	2021-04-14 08:42:01 +02:00
sock_diag.c
sock_map.c
sock_reuseport.c	udp: Prevent reuseport_select_sock from reading uninitialized socks	2021-01-23 16:03:59 +01:00
sock.c	net: sock: fix in-kernel mark setting	2021-06-10 13:39:17 +02:00
stream.c
sysctl_net_core.c
timestamping.c
tso.c
utils.c
xdp.c	xdp: fix xdp_return_frame() kernel BUG throw for page_pool memory model	2021-04-14 08:42:09 +02:00