kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-11-10 20:48:12 +00:00
Code Issues Releases Packages Activity
No description
1,311,259 commits 117 branches 5,827 tags 6.3 GiB
  • C 96.8%
  • Assembly 0.9%
  • Rust 0.7%
  • Shell 0.6%
  • Python 0.5%
  • Other 0.3%
Find a file
Helge Deller 3599bae489 parisc: Temporarily disable jump label support 
The 32-bit Debian kernel 6.12 fails to boot and crashes like this:

 init (pid 65): Protection id trap (code 7)
 CPU: 0 UID: 0 PID: 65 Comm: init Not tainted 6.12.9 #2
 Hardware name: 9000/778/B160L

      YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
 PSW: 00000000000001000000000000001111 Not tainted
 r00-03  0004000f 110d39d0 109a6558 12974400
 r04-07  12a810e0 12a810e0 00000000 12a81144
 r08-11  12a81174 00000007 00000000 00000002
 r12-15  f8c55c08 0000006c 00000001 f8c55c08
 r16-19  00000002 f8c58620 002da3a8 0000004e
 r20-23  00001a46 0000000f 10754f84 00000000
 r24-27  00000000 00000003 12ae6980 1127b9d0
 r28-31  00000000 00000000 12974440 109a6558
 sr00-03  00000000 00000000 00000000 00000010
 sr04-07  00000000 00000000 00000000 00000000

 IASQ: 00000000 00000000 IAOQ: 110d39d0 110d39d4
  IIR: baadf00d    ISR: 00000000  IOR: 110d39d0
  CPU:        0   CR30: 128740c0 CR31: 00000000
  ORIG_R28: 000003f3
  IAOQ[0]: 0x110d39d0
  IAOQ[1]: 0x110d39d4
  RP(r2): security_sk_free+0x70/0x1a4
 Backtrace:
  [<10d8c844>] __sk_destruct+0x2bc/0x378
  [<10d8e33c>] sk_destruct+0x68/0x8c
  [<10d8e3dc>] __sk_free+0x7c/0x148
  [<10d8e560>] sk_free+0xb8/0xf0
  [<10f6420c>] unix_release_sock+0x3ac/0x50c
  [<10f643b8>] unix_release+0x4c/0x7c
  [<10d832f8>] __sock_release+0x5c/0xf8
  [<10d833b4>] sock_close+0x20/0x44
  [<107ba52c>] __fput+0xf8/0x468
  [<107baa08>] __fput_sync+0xb4/0xd4
  [<107b471c>] sys_close+0x44/0x94
  [<10405334>] syscall_exit+0x0/0x10

Bisecting points to this commit which triggers the issue:
	commit  417c5643cd
	Author: KP Singh <kpsingh@kernel.org>
	Date:   Fri Aug 16 17:43:07 2024 +0200
	        lsm: replace indirect LSM hook calls with static calls

After more analysis it seems that we don't fully implement the static calls
and jump tables yet. Additionally the functions which mark kernel memory
read-only or read-write-executable needs to be further enhanced to be able to
fully support static calls.

Enabling CONFIG_SECURITY_YAMA=y was one possibility to trigger the issue,
although YAMA isn't the reason for the fault.

As a temporary solution disable JUMP_LABEL functionality to
avoid the crashes.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Cc: <stable@vger.kernel.org> # v6.12+
History 2025-01-20 21:05:32 +01:00
arch
block
certs
crypto
Documentation
drivers
fs
include
init
io_uring
ipc
kernel
lib
LICENSES
mm
net
rust
samples
scripts
security
sound
tools
usr
virt
.clang-format
.cocciconfig
.editorconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
.rustfmt.toml
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile
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 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.