Eric Dumazet c88644ab5b net: initialize init_net earlier ... [ Upstream commit 9c1be1935f ] While testing a patch that will follow later ("net: add netns refcount tracker to struct nsproxy") I found that devtmpfs_init() was called before init_net was initialized. This is a bug, because devtmpfs_setup() calls ksys_unshare(CLONE_NEWNS); This has the effect of increasing init_net refcount, which will be later overwritten to 1, as part of setup_net(&init_net) We had too many prior patches [1] trying to work around the root cause. Really, make sure init_net is in BSS section, and that net_ns_init() is called earlier at boot time. Note that another patch ("vfs: add netns refcount tracker to struct fs_context") also will need net_ns_init() being called before vfs_caches_init() As a bonus, this patch saves around 4KB in .data section. [1] f8c46cb390 ("netns: do not call pernet ops for not yet set up init_net namespace") b5082df801 ("net: Initialise init_net.count to 1") 734b65417b ("net: Statically initialize init_net.dev_base_head") v2: fixed a build error reported by kernel build bots (CONFIG_NET=n) Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-04-13 19:27:12 +02:00
..
Kconfig	Kbuild updates for v5.17	2022-01-19 11:15:19 +02:00
Makefile	kbuild: do not quote string values in include/config/auto.conf	2022-01-08 18:03:57 +09:00
calibrate.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
do_mounts.c	init: don't panic if mount_nodev_root failed	2021-09-19 22:24:52 -04:00
do_mounts.h	init: add an init_mknod helper	2020-07-31 08:17:54 +02:00
do_mounts_initrd.c	Merge branch 'hch.init_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-08-07 09:40:34 -07:00
do_mounts_rd.c	init: add an init_unlink helper	2020-07-31 08:17:52 +02:00
init_task.c	kcsan: Remove redundant zero-initialization of globals	2021-12-09 16:42:26 -08:00
initramfs.c	memblock: use memblock_free for freeing virtual pointers	2021-11-06 13:30:41 -07:00
main.c	net: initialize init_net earlier	2022-04-13 19:27:12 +02:00
noinitramfs.c	init: move usermodehelper_enable() to populate_rootfs()	2021-09-08 11:50:27 -07:00
version.c	kbuild: add an elfnote for whether vmlinux is built with lto	2021-04-25 05:25:42 +09:00