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Helge Deller ec737e7fdf AppArmor: Allow apparmor to handle unaligned dfa tables [ Upstream commit `64802f7312` ] The dfa tables can originate from kernel or userspace and 8-byte alignment isn't always guaranteed and as such may trigger unaligned memory accesses on various architectures. Resulting in the following [ 73.901376] WARNING: CPU: 0 PID: 341 at security/apparmor/match.c:316 aa_dfa_unpack+0x6cc/0x720 [ 74.015867] Modules linked in: binfmt_misc evdev flash sg drm drm_panel_orientation_quirks backlight i2c_core configfs nfnetlink autofs4 ext4 crc16 mbcache jbd2 hid_generic usbhid sr_mod hid cdrom sd_mod ata_generic ohci_pci ehci_pci ehci_hcd ohci_hcd pata_ali libata sym53c8xx scsi_transport_spi tg3 scsi_mod usbcore libphy scsi_common mdio_bus usb_common [ 74.428977] CPU: 0 UID: 0 PID: 341 Comm: apparmor_parser Not tainted 6.18.0-rc6+ #9 NONE [ 74.536543] Call Trace: [ 74.568561] [<0000000000434c24>] dump_stack+0x8/0x18 [ 74.633757] [<0000000000476438>] __warn+0xd8/0x100 [ 74.696664] [<00000000004296d4>] warn_slowpath_fmt+0x34/0x74 [ 74.771006] [<00000000008db28c>] aa_dfa_unpack+0x6cc/0x720 [ 74.843062] [<00000000008e643c>] unpack_pdb+0xbc/0x7e0 [ 74.910545] [<00000000008e7740>] unpack_profile+0xbe0/0x1300 [ 74.984888] [<00000000008e82e0>] aa_unpack+0xe0/0x6a0 [ 75.051226] [<00000000008e3ec4>] aa_replace_profiles+0x64/0x1160 [ 75.130144] [<00000000008d4d90>] policy_update+0xf0/0x280 [ 75.201057] [<00000000008d4fc8>] profile_replace+0xa8/0x100 [ 75.274258] [<0000000000766bd0>] vfs_write+0x90/0x420 [ 75.340594] [<00000000007670cc>] ksys_write+0x4c/0xe0 [ 75.406932] [<0000000000767174>] sys_write+0x14/0x40 [ 75.472126] [<0000000000406174>] linux_sparc_syscall+0x34/0x44 [ 75.548802] ---[ end trace 0000000000000000 ]--- [ 75.609503] dfa blob stream 0xfff0000008926b96 not aligned. [ 75.682695] Kernel unaligned access at TPC[8db2a8] aa_dfa_unpack+0x6e8/0x720 Work around it by using the get_unaligned_xx() helpers. Fixes: `e6e8bf4188` ("apparmor: fix restricted endian type warnings for dfa unpack") Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Closes: https://github.com/sparclinux/issues/issues/30 Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: John Johansen <john.johansen@canonical.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2026-03-04 07:20:40 -05:00
arch	arm64: dts: qcom: sm6115: Add CX_MEM/DBGC GPU regions	2026-03-04 07:19:47 -05:00
block	block: add a bio_add_virt_nofail helper	2026-03-04 07:19:26 -05:00
certs	sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3	2024-09-20 19:52:48 +03:00
crypto	crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec	2026-01-30 10:28:39 +01:00
Documentation	Documentation: tracing: Add PCI tracepoint documentation	2026-03-04 07:19:59 -05:00
drivers	net/mlx5e: Use unsigned for mlx5e_get_max_num_channels	2026-03-04 07:20:40 -05:00
fs	fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot	2026-03-04 07:20:34 -05:00
include	net/mlx5: Fix multiport device check over light SFs	2026-03-04 07:20:39 -05:00
init	init: handle bootloader identifier in kernel parameters	2025-10-19 16:33:50 +02:00
io_uring	io_uring/cancel: de-unionize file and user_data in struct io_cancel_data	2026-03-04 07:20:34 -05:00
ipc	ipc: don't audit capability check in ipc_permissions()	2026-03-04 07:20:07 -05:00
kernel	tracing: Remove duplicate ENABLE_EVENT_STR and DISABLE_EVENT_STR macros	2026-03-04 07:20:25 -05:00
lib	objpool: fix the overestimation of object pooling metadata size	2026-03-04 07:20:35 -05:00
LICENSES	LICENSES: add 0BSD license text	2024-09-01 20:43:24 -07:00
mm	mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather	2026-02-19 16:29:55 +01:00
net	icmp: prevent possible overflow in icmp_global_allow()	2026-03-04 07:20:39 -05:00
rust	rust: rbtree: fix documentation typo in CursorMut peek_next method	2026-02-06 16:55:44 +01:00
samples	samples/ftrace: Adjust LoongArch register restore order in direct calls	2026-01-08 10:14:50 +01:00
scripts	scripts: generate_rust_analyzer: Add compiler_builtins -> core dep	2026-02-06 16:55:47 +01:00
security	AppArmor: Allow apparmor to handle unaligned dfa tables	2026-03-04 07:20:40 -05:00
sound	ASoC: nau8821: Fixup nau8821_enable_jack_detect()	2026-03-04 07:19:52 -05:00
tools	bpftool: Fix truncated netlink dumps	2026-03-04 07:20:38 -05:00
usr	kbuild: uapi: Strip comments before size type check	2025-11-13 15:34:35 -05:00
virt	KVM: Don't clobber irqfd routing type when deassigning irqfd	2026-02-11 13:40:17 +01:00
.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: give Clippy the minimum supported Rust version	2025-08-01 09:48:44 +01:00
.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	gpiolib-acpi: Update file references in the Documentation and MAINTAINERS	2026-02-11 13:40:29 +01:00
Makefile	kbuild: Add objtool to top-level clean target	2026-03-04 07:20:35 -05:00
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.