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A mirror of the official Linux kernel repository just in case
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Tetsuo Handa ada1986d07 tomoyo: fallback to realpath if symlink's pathname does not exist 
Alfred Agrell found that TOMOYO cannot handle execveat(AT_EMPTY_PATH)
inside chroot environment where /dev and /proc are not mounted, for
commit 51f39a1f0c ("syscalls: implement execveat() system call") missed
that TOMOYO tries to canonicalize argv[0] when the filename fed to the
executed program as argv[0] is supplied using potentially nonexistent
pathname.

Since "/dev/fd/<fd>" already lost symlink information used for obtaining
that <fd>, it is too late to reconstruct symlink's pathname. Although
<filename> part of "/dev/fd/<fd>/<filename>" might not be canonicalized,
TOMOYO cannot use tomoyo_realpath_nofollow() when /dev or /proc is not
mounted. Therefore, fallback to tomoyo_realpath_from_path() when
tomoyo_realpath_nofollow() failed.

Reported-by: Alfred Agrell <blubban@gmail.com>
Closes: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1082001
Fixes: 51f39a1f0c ("syscalls: implement execveat() system call")
Cc: stable@vger.kernel.org # v3.19+
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
2024-09-25 22:30:59 +09:00
arch Merge branch 'address-masking' 2024-09-22 11:19:35 -07:00
block vfs-6.12.blocksize 2024-09-20 17:53:17 -07:00
certs kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
crypto crypto: aegis128 - Fix indentation issue in crypto_aegis128_process_crypt() 2024-09-13 18:26:52 +08:00
Documentation ring-buffer: Updates for v6.12: 2024-09-22 09:47:16 -07:00
drivers sched_ext: Initial pull request for v6.12 2024-09-21 09:44:57 -07:00
fs Merge branch 'address-masking' 2024-09-22 11:19:35 -07:00
include Merge branch 'address-masking' 2024-09-22 11:19:35 -07:00
init sched_ext: Initial pull request for v6.12 2024-09-21 09:44:57 -07:00
io_uring slab updates for 6.12 2024-09-18 08:53:53 +02:00
ipc ipc/shm, mm: drop do_vma_munmap() 2024-09-03 21:15:52 -07:00
kernel ring-buffer: Updates for v6.12: 2024-09-22 09:47:16 -07:00
lib Merge branch 'address-masking' 2024-09-22 11:19:35 -07:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm Many singleton patches - please see the various changelogs for details. 2024-09-21 08:20:50 -07:00
net bpf-next-6.12 2024-09-21 09:27:50 -07:00
rust Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-09-05 20:37:20 -07:00
samples bpf-next-6.12 2024-09-21 09:27:50 -07:00
scripts bpf-next-6.12 2024-09-21 09:27:50 -07:00
security tomoyo: fallback to realpath if symlink's pathname does not exist 2024-09-25 22:30:59 +09:00
sound sound updates for 6.12-rc1 2024-09-17 17:03:43 +02:00
tools ring-buffer: Updates for v6.12: 2024-09-22 09:47:16 -07:00
usr initramfs: shorten cmd_initfs in usr/Makefile 2024-07-16 01:07:52 +09:00
virt KVM: use follow_pfnmap API 2024-09-17 01:06:59 -07:00
.clang-format Docs: Move clang-format from process/ to dev-tools/ 2024-06-26 16:36:00 -06:00
.cocciconfig
.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 .gitignore: add .gcda files 2024-08-09 13:18:46 +01:00
.mailmap drm next for 6.12-rc1 2024-09-19 10:18:15 +02:00
.rustfmt.toml
COPYING
CREDITS MAINTAINERS: Mark powerpc spufs as orphaned 2024-08-19 21:27:56 +10:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig
MAINTAINERS sched_ext: Initial pull request for v6.12 2024-09-21 09:44:57 -07:00
Makefile Linux 6.11 2024-09-15 16:57:56 +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.