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Filename Latest commit message Latest commit date
Rik van Riel cf92251dc5 arm64/mmap: properly account for stack randomization in mmap_base
When RLIMIT_STACK is, for example, 256MB, the current code results in a
gap between the top of the task and mmap_base of 256MB, failing to take
into account the amount by which the stack address was randomized.  In
other words, the stack gets less than RLIMIT_STACK space.

Ensure that the gap between the stack and mmap_base always takes stack
randomization and the stack guard gap into account.

Obtained from Daniel Micay's linux-hardened tree.

Link: http://lkml.kernel.org/r/20170622200033.25714-3-riel@redhat.com
Signed-off-by: Daniel Micay <danielmicay@gmail.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Reported-by: Florian Weimer <fweimer@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Daniel Micay <danielmicay@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-07-12 16:26:03 -07:00
arch arm64/mmap: properly account for stack randomization in mmap_base 2017-07-12 16:26:03 -07:00
block
certs
crypto
Documentation
drivers IB/rxe: do not copy extra stack memory to skb 2017-07-12 16:26:03 -07:00
firmware
fs
include random,stackprotect: introduce get_random_canary function 2017-07-12 16:26:03 -07:00
init
ipc ipc/util.h: update documentation for ipc_getref() and ipc_putref() 2017-07-12 16:26:02 -07:00
kernel fork,random: use get_random_canary() to set tsk->stack_canary 2017-07-12 16:26:03 -07:00
lib include/linux/string.h: add the option of fortified string.h functions 2017-07-12 16:26:03 -07:00
mm
net net/netfilter/x_tables.c: use kvmalloc() in xt_alloc_table_info() 2017-07-12 16:26:02 -07:00
samples
scripts
security include/linux/string.h: add the option of fortified string.h functions 2017-07-12 16:26:03 -07:00
sound
tools
usr
virt
.cocciconfig
.get_maintainer.ignore
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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.