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Ian Kent d4d79b8195 autofs: fix directory and symlink access
Depending on how it is configured the autofs user space daemon can leave
in use mounts mounted at exit and re-connect to them at start up.  But for
this to work best the state of the autofs file system needs to be left
intact over the restart.

Also, at system shutdown, mounts in an autofs file system might be
umounted exposing a mount point trigger for which subsequent access can
lead to a hang.  So recent versions of automount(8) now does its best to
set autofs file system mounts catatonic at shutdown.

When autofs file system mounts are catatonic it's currently possible to
create and remove directories and symlinks which can be a problem at
restart, as described above.

So return EACCES in the directory, symlink and unlink methods if the
autofs file system is catatonic.

Link: http://lkml.kernel.org/r/152902119090.4144.9561910674530214291.stgit@pluto.themaw.net
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-22 10:52:49 -07:00
arch module: use relative references for __ksymtab entries 2018-08-22 10:52:47 -07:00
block for-4.19/block-20180812 2018-08-14 10:23:25 -07:00
certs Replace magic for trusting the secondary keyring with #define 2018-08-16 09:57:20 -07:00
crypto DMAengine updates for v4.19-rc1 2018-08-18 15:55:59 -07:00
Documentation kernel/hung_task.c: allow to set checking interval separately from timeout 2018-08-22 10:52:47 -07:00
drivers bcache: use routines from lib/crc64.c for CRC64 calculation 2018-08-22 10:52:48 -07:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs autofs: fix directory and symlink access 2018-08-22 10:52:49 -07:00
include lib: add crc64 calculation routines 2018-08-22 10:52:48 -07:00
init init/main.c: log init process file name 2018-08-22 10:52:49 -07:00
ipc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-08-15 15:04:25 -07:00
kernel sched/wait: assert the wait_queue_head lock is held in __wake_up_common 2018-08-22 10:52:47 -07:00
lib lib/test_hexdump.c: fix failure on big endian cpu 2018-08-22 10:52:48 -07:00
LICENSES LICENSES: Add Linux-OpenIB license text 2018-04-27 16:41:53 -06:00
mm bdi: use irqsave variant of refcount_dec_and_lock() 2018-08-22 10:52:46 -07:00
net The main things are support for cephx v2 authentication protocol and 2018-08-20 18:26:55 -07:00
samples samples/bpf: all XDP samples should unload xdp/bpf prog on SIGTERM 2018-08-16 21:55:32 +02:00
scripts checkpatch: DT bindings should be a separate patch 2018-08-22 10:52:49 -07:00
security init: allow initcall tables to be emitted using relative references 2018-08-22 10:52:47 -07:00
sound DMAengine updates for v4.19-rc1 2018-08-18 15:55:59 -07:00
tools proc: test /proc/thread-self symlink 2018-08-22 10:52:45 -07:00
usr kbuild: rename built-in.o to built-in.a 2018-03-26 02:01:19 +09:00
virt mm, oom: distinguish blockable mode for mmu notifiers 2018-08-22 10:52:44 -07:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap Merge branch 'linus/master' into rdma.git for-next 2018-08-16 14:21:29 -06:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS - New Drivers 2018-08-20 15:38:44 -07:00
Makefile Updates for v4.19: 2018-08-20 18:32:00 -07:00
README Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -06:00

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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.