WSL2-Linux-Kernel

The source for the Linux kernel used in Windows Subsystem for Linux 2 (WSL2)

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Florian Westphal e38fbfa972 netfilter: nf_tables: merge nft_rules_old structure and end of ruleblob marker In order to free the rules in a chain via call_rcu, the rule array used to stash a rcu_head and space for a pointer at the end of the rule array. When the current nft_rule_dp blob format got added in `2c865a8a28` ("netfilter: nf_tables: add rule blob layout"), this results in a double-trailer: size (unsigned long) struct nft_rule_dp struct nft_expr ... struct nft_rule_dp struct nft_expr ... struct nft_rule_dp (is_last=1) // Trailer The trailer, struct nft_rule_dp (is_last=1), is not accounted for in size, so it can be located via start_addr + size. Because the rcu_head is stored after 'start+size' as well this means the is_last trailer is aliased to the rcu_head (struct nft_rules_old). This is harmless, because at this time the nft_do_chain function never evaluates/accesses the trailer, it only checks the address boundary: for (; rule < last_rule; rule = nft_rule_next(rule)) { ... But this way the last_rule address has to be stashed in the jump structure to restore it after returning from a chain. nft_do_chain stack usage has become way too big, so put it on a diet. Without this patch is impossible to use for (; !rule->is_last; rule = nft_rule_next(rule)) { ... because on free, the needed update of the rcu_head will clobber the nft_rule_dp is_last bit. Furthermore, also stash the chain pointer in the trailer, this allows to recover the original chain structure from nf_tables_trace infra without a need to place them in the jump struct. After this patch it is trivial to diet the jump stack structure, done in the next two patches. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>		2023-04-22 01:39:40 +02:00
Documentation	wireless-next patches for v6.4	2023-04-21 07:35:51 -07:00
LICENSES	…
arch	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-04-20 16:29:51 -07:00
block	…
certs	…
crypto	…
drivers	wireless-next patches for v6.4	2023-04-21 07:35:51 -07:00
fs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-04-20 16:29:51 -07:00
include	wireless-next patches for v6.4	2023-04-21 07:35:51 -07:00
init	init/initramfs: Fix argument forwarding to panic() in panic_show_mem()	2023-04-16 17:37:01 +09:00
io_uring	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-04-20 16:29:51 -07:00
ipc	…
kernel	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-04-20 16:29:51 -07:00
lib	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-04-20 16:29:51 -07:00
mm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-04-20 16:29:51 -07:00
net	netfilter: nf_tables: merge nft_rules_old structure and end of ruleblob marker	2023-04-22 01:39:40 +02:00
rust	rust: allow to use INIT_STACK_ALL_ZERO	2023-04-19 19:34:43 +02:00
samples	…
scripts	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-04-20 16:29:51 -07:00
security	…
sound	…
tools	selftests: net: Add bridge neighbor suppression test	2023-04-21 08:25:50 +01:00
usr	initramfs: Check negative timestamp to prevent broken cpio archive	2023-04-16 17:37:01 +09:00
virt	…
.clang-format	…
.cocciconfig	…
.get_maintainer.ignore	…
.gitattributes	…
.gitignore	.gitignore: Do not ignore .kunitconfig files	2023-04-19 18:48:48 -07:00
.mailmap	Networking fixes for 6.3-rc8, including fixes from netfilter and bpf	2023-04-20 11:03:51 -07:00
.rustfmt.toml	…
COPYING	…
CREDITS	…
Kbuild	…
Kconfig	…
MAINTAINERS	wireless-next patches for v6.4	2023-04-21 07:35:51 -07:00
Makefile	Linux 6.3-rc7	2023-04-16 15:23:53 -07:00
README	…

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.