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Martin KaFai Lau da70cb95b8 bpftool: Fix cgroup command to only show cgroup bpf programs commit `b69d4413aa` upstream. The netkit program is not a cgroup bpf program and should not be shown in the output of the "bpftool cgroup show" command. However, if the netkit device happens to have ifindex 3, the "bpftool cgroup show" command will output the netkit bpf program as well: > ip -d link show dev nk1 3: nk1@if2: ... link/ether ... netkit mode ... > bpftool net show tc: nk1(3) netkit/peer tw_ns_nk2phy prog_id 469447 > bpftool cgroup show /sys/fs/cgroup/... ID AttachType AttachFlags Name ... ... ... 469447 netkit_peer tw_ns_nk2phy The reason is that the target_fd (which is the cgroup_fd here) and the target_ifindex are in a union in the uapi/linux/bpf.h. The bpftool iterates all values in "enum bpf_attach_type" which includes non cgroup attach types like netkit. The cgroup_fd is usually 3 here, so the bug is triggered when the netkit ifindex just happens to be 3 as well. The bpftool's cgroup.c already has a list of cgroup-only attach type defined in "cgroup_attach_types[]". This patch fixes it by iterating over "cgroup_attach_types[]" instead of "__MAX_BPF_ATTACH_TYPE". Cc: Quentin Monnet <qmo@kernel.org> Reported-by: Takshak Chahande <ctakshak@meta.com> Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Quentin Monnet <qmo@kernel.org> Link: https://lore.kernel.org/r/20250507203232.1420762-1-martin.lau@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2025-06-27 11:11:46 +01:00
arch	RISC-V: KVM: Don't treat SBI HFENCE calls as NOPs	2025-06-27 11:11:45 +01:00
block	block: Clear BIO_EMULATES_ZONE_APPEND flag on BIO completion	2025-06-27 11:11:19 +01:00
certs	sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3	2024-09-20 19:52:48 +03:00
crypto	crypto: api - Redo lookup on EEXIST	2025-06-19 15:31:30 +02:00
Documentation	dt-bindings: i2c: nvidia,tegra20-i2c: Specify the required properties	2025-06-27 11:11:44 +01:00
drivers	gpio: mlxbf3: only get IRQ for device instance 0	2025-06-27 11:11:46 +01:00
fs	cifs: Remove duplicate fattr->cf_dtype assignment from wsl_to_fattr() function	2025-06-27 11:11:46 +01:00
include	ipv6: replace ipcm6_init calls with ipcm6_init_sk	2025-06-27 11:11:41 +01:00
init	rust: clean Rust 1.88.0's `unnecessary_transmutes` lint	2025-05-18 08:24:51 +02:00
io_uring	io_uring/sqpoll: don't put task_struct on tctx setup failure	2025-06-27 11:11:42 +01:00
ipc	ipc: fix to protect IPCS lookups using RCU	2025-06-27 11:11:22 +01:00
kernel	perf/core: Fix WARN in perf_cgroup_switch()	2025-06-27 11:11:45 +01:00
lib	pldmfw: Select CRC32 when PLDMFW is selected	2025-06-27 11:11:42 +01:00
LICENSES	LICENSES: add 0BSD license text	2024-09-01 20:43:24 -07:00
mm	mm/hugetlb: unshare page tables during VMA split, not before	2025-06-27 11:11:40 +01:00
net	net: atm: fix /proc/net/atm/lec handling	2025-06-27 11:11:44 +01:00
rust	rust: compile libcore with edition 2024 for 1.87+	2025-06-27 11:11:40 +01:00
samples	samples/bpf: Fix compilation failure for samples/bpf on LoongArch Fedora	2025-05-29 11:02:01 +02:00
scripts	rust: compile libcore with edition 2024 for 1.87+	2025-06-27 11:11:40 +01:00
security	selinux: fix selinux_xfrm_alloc_user() to set correct ctx_len	2025-06-27 11:11:38 +01:00
sound	ALSA: hda/realtek: Add quirk for Asus GU605C	2025-06-27 11:11:40 +01:00
tools	bpftool: Fix cgroup command to only show cgroup bpf programs	2025-06-27 11:11:46 +01:00
usr	kbuild: hdrcheck: fix cross build with clang	2025-03-13 13:02:18 +01:00
virt	KVM: Add member to struct kvm_gfn_range to indicate private/shared	2025-05-22 14:29:36 +02:00
.clang-format	clang-format: Update with v6.11-rc1's `for_each` macro list	2024-08-02 13:20:31 +02:00
.clippy.toml	rust: clean Rust 1.88.0's warning about `clippy::disallowed_macros` configuration	2025-05-18 08:24:51 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.editorconfig	.editorconfig: remove trim_trailing_whitespace option	2024-06-13 16:47:52 +02:00
.get_maintainer.ignore	Add Jeff Kirsher to .get_maintainer.ignore	2024-03-08 11:36:54 +00:00
.gitattributes	.gitattributes: set diff driver for Rust source code files	2023-05-31 17:48:25 +02:00
.gitignore	rust: introduce `.clippy.toml`	2025-03-13 13:01:42 +01:00
.mailmap	mailmap: add entry for Thorsten Blum	2024-11-07 14:14:59 -08:00
.rustfmt.toml	rust: add `.rustfmt.toml`	2022-09-28 09:02:20 +02:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Remove self from DSA entry	2024-11-03 12:52:38 -08:00
Kbuild	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	MAINTAINERS: Update Alexey Makhalov's email address	2025-05-22 14:29:46 +02:00
Makefile	Linux 6.12.34	2025-06-19 15:32:38 +02:00
README	README: Fix spelling	2024-03-18 03:36:32 -06:00

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 reStructuredText 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.