Laura Abbott 1414c7f4f7 mm/page_poisoning.c: allow for zero poisoning ...

By default, page poisoning uses a poison value (0xaa) on free.  If this
is changed to 0, the page is not only sanitized but zeroing on alloc
with __GFP_ZERO can be skipped as well.  The tradeoff is that detecting
corruption from the poisoning is harder to detect.  This feature also
cannot be used with hibernation since pages are not guaranteed to be
zeroed after hibernation.

Credit to Grsecurity/PaX team for inspiring this work

Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
Acked-by: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Mathias Krause <minipli@googlemail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Jianyu Zhan <nasa4836@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2016-03-15 16:55:16 -07:00

..

bpf

bpf: fix branch offset adjustment on backjumps after patching ctx expansion

2016-02-10 16:56:47 -05:00

configs

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debug

mm/init: Add 'rodata=off' boot cmdline parameter to disable read-only kernel mappings

2016-02-22 08:51:37 +01:00

events

Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-03-14 19:44:38 -07:00

gcov

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irq

Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-01-31 14:48:58 -08:00

livepatch

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locking

tags: Fix DEFINE_PER_CPU expansions

2016-03-15 16:55:16 -07:00

power

mm/page_poisoning.c: allow for zero poisoning

2016-03-15 16:55:16 -07:00

printk

kernel: printk: specify alignment for struct printk_log

2016-01-20 17:09:18 -08:00

rcu

tags: Fix DEFINE_PER_CPU expansions

2016-03-15 16:55:16 -07:00

sched

Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-03-14 19:44:38 -07:00

time

sched-clock: Migrate to use new tick dependency mask model

2016-03-02 16:44:57 +01:00

trace

Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-03-14 17:58:53 -07:00

.gitignore

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acct.c

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async.c

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audit_fsnotify.c

wrappers for ->i_mutex access

2016-01-22 18:04:28 -05:00

audit_tree.c

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audit_watch.c

wrappers for ->i_mutex access

2016-01-22 18:04:28 -05:00

audit.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

2016-01-17 19:13:15 -08:00

audit.h

security: Make inode argument of inode_getsecid non-const

2015-12-24 11:09:39 -05:00

auditfilter.c

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auditsc.c

security: Make inode argument of inode_getsecid non-const

2015-12-24 11:09:39 -05:00

backtracetest.c

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bounds.c

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capability.c

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cgroup_freezer.c

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cgroup_pids.c

cgroup_pids: fix a typo.

2015-12-14 14:54:37 -05:00

cgroup.c

cgroup: make sure a parent css isn't freed before its children

2016-01-22 10:42:58 -05:00

compat.c

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configs.c

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context_tracking.c

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cpu_pm.c

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cpu.c

kernel/cpu.c: make set_cpu_* static inlines

2016-01-20 17:09:18 -08:00

cpuset.c

cpuset: make mm migration asynchronous

2016-01-22 10:22:46 -05:00

crash_dump.c

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cred.c

kmemcg: account certain kmem allocations to memcg

2016-01-14 16:00:49 -08:00

delayacct.c

kmemcg: account certain kmem allocations to memcg

2016-01-14 16:00:49 -08:00

dma.c

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elfcore.c

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exec_domain.c

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exit.c

exit: remove unneeded declaration of exit_mm()

2016-01-20 17:09:18 -08:00

extable.c

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fork.c

mm: rework virtual memory accounting

2016-01-14 16:00:49 -08:00

freezer.c

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futex_compat.c

ptrace: use fsuid, fsgid, effective creds for fs access checks

2016-01-20 17:09:18 -08:00

futex.c

futex: Replace barrier() in unqueue_me() with READ_ONCE()

2016-03-08 17:04:02 +01:00

groups.c

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hung_task.c

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irq_work.c

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jump_label.c

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kallsyms.c

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kcmp.c

ptrace: use fsuid, fsgid, effective creds for fs access checks

2016-01-20 17:09:18 -08:00

Kconfig.freezer

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Kconfig.hz

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Kconfig.locks

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Kconfig.preempt

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kexec_core.c

kexec: Set IORESOURCE_SYSTEM_RAM for System RAM

2016-01-30 09:49:57 +01:00

kexec_file.c

x86, kexec, nvdimm: Use walk_iomem_res_desc() for iomem search

2016-01-30 09:49:59 +01:00

kexec_internal.h

kexec: move some memembers and definitions within the scope of CONFIG_KEXEC_FILE

2016-01-20 17:09:18 -08:00

kexec.c

kexec: set KEXEC_TYPE_CRASH before sanity_check_segment_list()

2016-01-20 17:09:18 -08:00

kmod.c

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kprobes.c

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ksysfs.c

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kthread.c

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latencytop.c

sched/debug: Make schedstats a runtime tunable that is disabled by default

2016-02-09 11:54:23 +01:00

Makefile

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membarrier.c

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memremap.c

mm: fix two typos in comments for to_vmem_altmap()

2016-03-15 16:55:16 -07:00

module_signing.c

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module-internal.h

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module.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching

2016-02-18 16:34:15 -08:00

notifier.c

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nsproxy.c

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padata.c

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panic.c

printk: do cond_resched() between lines while outputting to consoles

2016-01-16 11:17:25 -08:00

params.c

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pid_namespace.c

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pid.c

Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-01-31 15:44:04 -08:00

profile.c

sched/debug: Make schedstats a runtime tunable that is disabled by default

2016-02-09 11:54:23 +01:00

ptrace.c

ptrace: use fsuid, fsgid, effective creds for fs access checks

2016-01-20 17:09:18 -08:00

range.c

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reboot.c

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relay.c

wrappers for ->i_mutex access

2016-01-22 18:04:28 -05:00

resource.c

Merge tag 'v4.5-rc6' into core/resources, to resolve conflict

2016-03-04 12:12:08 +01:00

seccomp.c

seccomp: always propagate NO_NEW_PRIVS on tsync

2016-01-27 07:38:25 -08:00

signal.c

signals: avoid random wakeups in sigsuspend()

2016-02-05 18:10:40 -08:00

smp.c

locking/csd_lock: Use smp_cond_acquire() in csd_lock_wait()

2016-03-10 10:28:35 +01:00

smpboot.c

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smpboot.h

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softirq.c

sched/debug: Fix preempt_disable_ip recording for preempt_disable()

2016-02-29 09:53:10 +01:00

stacktrace.c

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stop_machine.c

kernel/stop_machine.c: remove CONFIG_SMP dependencies

2016-01-16 11:17:24 -08:00

sys_ni.c

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sys.c

prctl: take mmap sem for writing to protect against others

2016-01-20 17:09:18 -08:00

sysctl_binary.c

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sysctl.c

sched/debug: Make schedstats a runtime tunable that is disabled by default

2016-02-09 11:54:23 +01:00

task_work.c

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taskstats.c

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test_kprobes.c

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torture.c

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tracepoint.c

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tsacct.c

time, acct: Drop irq save & restore from __acct_update_integrals()

2016-02-29 09:53:09 +01:00

uid16.c

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up.c

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user_namespace.c

kernel/*: switch to memdup_user_nul()

2016-01-04 10:27:55 -05:00

user-return-notifier.c

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user.c

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utsname_sysctl.c

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utsname.c

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watchdog.c

Merge branch 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2016-01-11 18:53:13 -08:00

workqueue_internal.h

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workqueue.c

tags: Fix DEFINE_PER_CPU expansions

2016-03-15 16:55:16 -07:00