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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acpi
asm-generic	vmlinux.lds.h: Avoid orphan section with !SMP	2021-06-16 12:01:45 +02:00
clocksource
crypto
drm
dt-bindings
keys
kunit
kvm
linux	net: make get_net_ns return error if NET_NS is disabled	2021-06-23 14:42:44 +02:00
math-emu
media
memory
misc
net	net: make get_net_ns return error if NET_NS is disabled	2021-06-23 14:42:44 +02:00
pcmcia
ras
rdma
scsi
soc
sound
target
trace
uapi	HID: hid-input: add mapping for emoji picker key	2021-06-18 10:00:03 +02:00
vdso
video
xen