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Filename Latest commit message Latest commit date
Aleksa Sarai 8a7d7fa161 namei: only return -ECHILD from follow_dotdot_rcu() 
commit 2b98149c2377bff12be5dd3ce02ae0506e2dd613 upstream.

It's over-zealous to return hard errors under RCU-walk here, given that
a REF-walk will be triggered for all other cases handling ".." under
RCU.

The original purpose of this check was to ensure that if a rename occurs
such that a directory is moved outside of the bind-mount which the
resolution started in, it would be detected and blocked to avoid being
able to mess with paths outside of the bind-mount. However, triggering a
new REF-walk is just as effective a solution.

Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Fixes: 397d425dc2 ("vfs: Test for and handle paths that are unreachable from their mnt_root")
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-05 16:43:48 +01:00
arch MIPS: VPE: Fix a double free and a memory leak in 'release_vpe()' 2020-03-05 16:43:45 +01:00
block
certs
crypto crypto: rename sm3-256 to sm3 in hash_algo_name 2020-02-28 17:22:26 +01:00
Documentation kbuild: remove header compile test 2020-03-05 16:43:47 +01:00
drivers kbuild: remove header compile test 2020-03-05 16:43:47 +01:00
fs namei: only return -ECHILD from follow_dotdot_rcu() 2020-03-05 16:43:48 +01:00
include kbuild: remove header compile test 2020-03-05 16:43:47 +01:00
init kbuild: remove header compile test 2020-03-05 16:43:47 +01:00
ipc
kernel tracing: Disable trace_printk() on post poned tests 2020-03-05 16:43:43 +01:00
lib kbuild: move headers_check rule to usr/include/Makefile 2020-03-05 16:43:47 +01:00
LICENSES
mm mm: Avoid creating virtual address aliases in brk()/mmap()/mremap() 2020-02-28 17:22:21 +01:00
net net/smc: no peer ID in CLC decline for SMCD 2020-03-05 16:43:47 +01:00
samples
scripts kbuild: move headers_check rule to usr/include/Makefile 2020-03-05 16:43:47 +01:00
security
sound ASoC: SOF: Intel: hda: Add iDisp4 DAI 2020-02-28 17:22:29 +01:00
tools selftests: Install settings files to fix TIMEOUT failures 2020-03-05 16:43:47 +01:00
usr kbuild: move headers_check rule to usr/include/Makefile 2020-03-05 16:43:47 +01:00
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile kbuild: make single target builds even faster 2020-03-05 16:43:48 +01:00
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.