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Cyrill Gorcunov c857ab640c fs,eventpoll: don't test for bitfield with stack value
In case if epoll_ctl is called with operation EPOLL_CTL_DEL then
@epds.events variable allocated on stack may contain random bits which
we test then for EPOLLEXCLUSIVE.  Since currently the test look like

	if (epds.events & EPOLLEXCLUSIVE) {
		if (op == EPOLL_CTL_MOD)
			goto error_tgt_fput;
		if (op == EPOLL_CTL_ADD && (is_file_epoll(tf.file) ||
				(epds.events & ~EPOLLEXCLUSIVE_OK_BITS)))
			goto error_tgt_fput;
	}

Nothing serious will happen even if epds.events has this bit set, still
better to be on safe side and make sure that we're to test this bit at
all.

Link: http://lkml.kernel.org/r/20170214154935.GG1850@uranus.lan
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrey Vagin <avagin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-02-27 18:43:45 -08:00
arch kprobes: move kprobe declarations to asm-generic/kprobes.h 2017-02-27 18:43:45 -08:00
block
certs
crypto
Documentation autofs: update ioctl documentation regarding struct autofs_dev_ioctl 2017-02-27 18:43:45 -08:00
drivers rapidio: use get_user_pages_unlocked() 2017-02-27 18:43:45 -08:00
firmware
fs fs,eventpoll: don't test for bitfield with stack value 2017-02-27 18:43:45 -08:00
include include/linux/pid.h: use for_each_thread() in do_each_pid_thread() 2017-02-27 18:43:45 -08:00
init
ipc
kernel sigaltstack: support SS_AUTODISARM for CONFIG_COMPAT 2017-02-27 18:43:45 -08:00
lib
mm
net
samples
scripts
security
sound
tools tools/testing/selftests/sigaltstack/sas.c: improve output of sigaltstack testcase 2017-02-27 18:43:45 -08:00
usr
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.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
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COPYING
CREDITS
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MAINTAINERS kprobes: move kprobe declarations to asm-generic/kprobes.h 2017-02-27 18:43:45 -08:00
Makefile
README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

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.