Andy Lutomirski b18cb64ead fs/proc: Stop trying to report thread stacks ... This reverts more of: b76437579d ("procfs: mark thread stack correctly in proc/<pid>/maps") ... which was partially reverted by: 65376df582 ("proc: revert /proc/<pid>/maps [stack:TID] annotation") Originally, /proc/PID/task/TID/maps was the same as /proc/TID/maps. In current kernels, /proc/PID/maps (or /proc/TID/maps even for threads) shows "[stack]" for VMAs in the mm's stack address range. In contrast, /proc/PID/task/TID/maps uses KSTK_ESP to guess the target thread's stack's VMA. This is racy, probably returns garbage and, on arches with CONFIG_TASK_INFO_IN_THREAD=y, is also crash-prone: KSTK_ESP is not safe to use on tasks that aren't known to be running ordinary process-context kernel code. This patch removes the difference and just shows "[stack]" for VMAs in the mm's stack range. This is IMO much more sensible -- the actual "stack" address really is treated specially by the VM code, and the current thread stack isn't even well-defined for programs that frequently switch stacks on their own. Reported-by: Jann Horn <jann@thejh.net> Signed-off-by: Andy Lutomirski <luto@kernel.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Linux API <linux-api@vger.kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tycho Andersen <tycho.andersen@canonical.com> Link: http://lkml.kernel.org/r/3e678474ec14e0a0ec34c611016753eea2e1b8ba.1475257877.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>		2016-10-20 09:21:41 +02:00
..
80211	docs-rst: sphinxify 802.11 documentation	2016-10-11 16:19:17 -06:00
ABI	The big ticket item here is support for rbd exclusive-lock feature,	2016-10-10 13:52:05 -07:00
accounting	tools: move accounting tool from Documentation	2016-09-23 13:07:15 -06:00
acpi	Merge branches 'acpi-button', 'acpi-battery' and 'acpi-doc'	2016-10-02 01:40:20 +02:00
aoe
arm	linux-kselftest-4.9-rc1-update	2016-10-14 15:17:12 -07:00
arm64	arm64 updates for 4.9:	2016-10-03 08:58:35 -07:00
auxdisplay	samples: move auxdisplay example code from Documentation	2016-09-23 11:52:32 -06:00
backlight
blackfin	samples: move blackfin gptimers-example from Documentation	2016-10-10 07:12:02 -06:00
block	block: remove remnant refs to hardsect	2016-09-14 08:44:57 -06:00
blockdev	zram: cosmetic: cleanup documentation	2016-07-26 16:19:19 -07:00
bus-devices
cdrom
cgroup-v1	Three fixes for the docs build, including removing an annoying warning on	2016-08-07 10:23:17 -04:00
cma
connector	samples: connector: from Documentation to samples directory	2016-04-28 07:47:35 -06:00
console
cpu-freq	cpufreq-stats: Minor documentation fix	2016-09-08 23:05:07 +02:00
cpuidle
cris
crypto	crypto: doc - Fix typo	2016-05-31 16:41:55 +08:00
dev-tools	mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping	2016-10-11 15:06:33 -07:00
development-process	docs-rst: add inter-document cross references	2016-09-21 15:43:09 -06:00
device-mapper	block: rename bio bi_rw to bi_opf	2016-08-07 14:41:02 -06:00
devicetree	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2016-10-15 09:26:12 -07:00
dmaengine	dmaengine: documentation to the new callback mechanism	2016-08-08 08:11:42 +05:30
DocBook	A single commit converting the mac80211 DocBook template over to Sphinx.	2016-10-14 14:11:22 -07:00
driver-api	docs: Don't format internal MPT docs	2016-09-06 09:15:48 -06:00
driver-model	power supply and reset changes for the v4.9 series	2016-10-06 18:21:15 -07:00
early-userspace
EDID
extcon
fault-injection
fb	Documentation: fb: fix spelling mistakes	2016-05-10 12:05:27 +03:00
features	Documentation: MIPS supports HAVE_REGS_AND_STACK_ACCESS_API	2016-10-13 17:19:19 +02:00
filesystems	fs/proc: Stop trying to report thread stacks	2016-10-20 09:21:41 +02:00
firmware_class	Documentation: fix common spelling mistakes	2016-04-28 07:51:59 -06:00
fmc
fpga
frv
gpio	Merge branch 'gpio-irq-validmask' of /home/linus/linux-pinctrl into devel	2016-09-23 14:51:18 +02:00
gpu	Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux	2016-10-11 18:12:22 -07:00
hid	Documentation: HID: Intel ISH HID document	2016-08-17 11:13:07 +02:00
hwmon	hwmon: (max6650) Allow fan shutdown and initial rpm target	2016-09-08 21:34:17 -07:00
i2c	Documentation: i2c: slave-interface: add note for driver development	2016-09-08 16:57:14 +02:00
ia64	selftests: move ia64 tests from Documentation/ia64	2016-09-20 09:58:12 -06:00
ide
iio	iio: Documentation: Correct the path used to create triggers.	2016-10-01 00:49:58 -06:00
infiniband	IB/hfi1: Document new sysfs entries for hfi1 driver	2016-10-02 08:42:19 -04:00
input	Input: ALPS - add V8 protocol documentation	2016-10-04 11:47:02 -07:00
ioctl	doc: ioctl: Add some clarifications to botching-up-ioctls	2016-09-06 06:00:22 -06:00
isdn
ja_JP
kbuild	Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2016-10-14 14:26:58 -07:00
kdump	Documentation: kdump: Add description of enable multi-cpus support	2016-09-20 18:02:54 -06:00
ko_KR	locking/Documentation: Add Korean translation	2016-08-12 08:24:14 +02:00
laptops	tools: move laptops dslm tool from Documentation	2016-09-23 13:07:21 -06:00
leds	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds	2016-10-04 10:25:53 -07:00
livepatch	Documentation: livepatch: add section about arch-specific code	2016-08-18 23:41:56 +02:00
locking	locking/lglock: Remove lglock implementation	2016-09-22 15:25:56 +02:00
m68k
media	Linux 4.8	2016-10-05 16:43:53 -03:00
memory-devices
metag
mic	samples: move mic/mpssd example code from Documentation	2016-09-20 12:38:48 -06:00
mips
misc-devices	samples: move misc-devices/mei example code from Documentation	2016-09-23 11:51:43 -06:00
mmc	mmc: core: Extend sysfs with DSR register	2016-07-25 10:34:51 +02:00
mn10300
mtd
namespaces
netlabel
networking	linux-kselftest-4.9-rc1-update	2016-10-14 15:17:12 -07:00
nfc
nios2
nvdimm	libnvdimm, btt: update the usage section in Documentation	2016-06-17 16:23:23 -07:00
nvmem
parisc
PCI	PCI changes for the v4.9 merge window:	2016-10-07 11:46:37 -07:00
pcmcia	tools: move pcmcia crc32hash tool from Documentation	2016-09-23 13:07:27 -06:00
perf	perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver	2016-09-15 11:20:55 -07:00
phy
platform
power	power supply and reset changes for the v4.9 series	2016-10-06 18:21:15 -07:00
powerpc	powerpc updates for 4.9	2016-10-07 20:19:31 -07:00
pps	Documentation: pps: fix spelling mistake	2016-04-28 07:23:59 -06:00
prctl	selftests: move prctl tests from Documentation/prctl	2016-09-20 09:09:09 -06:00
pti
ptp	selftests: move ptp tests from Documentation/ptp	2016-09-20 09:54:38 -06:00
rapidio	rapidio/documentation/mport_cdev: add missing parameter description	2016-09-01 17:52:02 -07:00
RCU	kthread: kthread worker API cleanup	2016-10-11 15:06:33 -07:00
s390	s390/Documentation: improve sort command for trace buffer	2016-06-13 15:58:23 +02:00
scheduler	sched/deadline: Document behavior of sched_yield()	2016-09-10 11:17:41 +02:00
scsi	scsi: g_NCR5380: Stop using scsi_module.c	2016-09-29 21:52:43 -04:00
security	Some big changes this month, headlined by the addition of a new formatted	2016-07-26 13:05:11 -07:00
serial	Documentation: rs485: Do not define manually the ioctl	2016-08-18 11:08:33 -06:00
sh
sound	ASoC: Updates for v4.8	2016-07-26 10:35:31 +02:00
sphinx	Merge tag 'docs-next' of git://git.lwn.net/linux.git into patchwork	2016-09-19 16:36:41 -03:00
sphinx-static	This is the documentation update pull for the 4.9 merge window.	2016-10-04 13:54:07 -07:00
spi	Doc: update 00-INDEX files to reflect the runnable code move	2016-10-10 07:12:09 -06:00
sysctl	mnt: Add a per mount namespace limit on the number of mounts	2016-09-30 12:46:48 -05:00
target	target: make close_session optional	2016-05-10 01:19:26 -07:00
thermal	thermal: Add support for hardware-tracked trip points	2016-09-27 14:02:16 +08:00
timers	Doc: update 00-INDEX files to reflect the runnable code move	2016-10-10 07:12:09 -06:00
tpm	tpm: Add documentation for the tpm_vtpm_proxy device driver	2016-06-25 17:26:35 +03:00
trace	This release cycle is rather small. Just a few fixes to tracing.	2016-10-06 11:48:41 -07:00
usb	Documentation: tiny typo fix in usb/gadget_multi.txt	2016-06-23 08:09:10 -06:00
virtual	KVM: arm64: Require in-kernel irqchip for PMU support	2016-09-27 18:57:07 +02:00
vm	Three fixes for the docs build, including removing an annoying warning on	2016-08-07 10:23:17 -04:00
w1	w1: add ability to set (SRAM) and store (EEPROM) configuration for temp sensors like DS18B20	2016-05-01 14:37:49 -07:00
watchdog	linux-kselftest-4.9-rc1-update	2016-10-14 15:17:12 -07:00
wimax
x86	Merge branch 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-10-10 11:01:51 -07:00
xtensa	xtensa: cleanup MMU setup and kernel layout macros	2016-07-24 06:33:58 +03:00
zh_CN	docs: deprecate kernel-doc-nano-HOWTO.txt	2016-07-20 16:45:37 -06:00
.gitignore	Add .pyc files to .gitignore	2016-06-30 13:07:33 -06:00
00-INDEX	Doc: update 00-INDEX files to reflect the runnable code move	2016-10-10 07:12:09 -06:00
adding-syscalls.txt
applying-patches.txt	docs: Clean up bare :: lines	2016-09-20 18:46:36 -06:00
assoc_array.txt
atomic_ops.txt
bad_memory.txt
basic_profiling.txt
bcache.txt	bcache: documentation formatting, edited for clarity, stripe alignment notes	2016-06-23 07:58:38 -06:00
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt
cgroup-v2.txt
Changes	docs: Clean up bare :: lines	2016-09-20 18:46:36 -06:00
circular-buffers.txt
clk.txt	Documentation: clk: update file names containing referenced structures	2016-08-14 12:12:36 -06:00
CodeOfConflict	URL changed for Linux Foundation TAB	2016-10-01 00:57:13 -06:00
CodingStyle	docs: Remove space-before-label guidance from CodingStyle	2016-09-21 15:53:31 -06:00
conf.py	media updates for v4.9-rc1	2016-10-11 13:22:22 -07:00
cpu-hotplug.txt
cpu-load.txt
cputopology.txt	topology/sysfs: provide drawer id and siblings attributes	2016-06-13 15:58:27 +02:00
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
devices.txt
digsig.txt
DMA-API-HOWTO.txt	Documentation: DMA-API-HOWTO: Fix a typo	2016-09-20 17:58:46 -06:00
DMA-API.txt	dma-mapping: add dma_{map,unmap}_resource	2016-09-26 22:16:41 +05:30
DMA-attributes.txt	dma-mapping: introduce the DMA_ATTR_NO_WARN attribute	2016-10-11 15:06:32 -07:00
dma-buf-sharing.txt
DMA-ISA-LPC.txt
docutils.conf	doc-rst: add docutils config file	2016-08-14 11:52:40 -06:00
dontdiff	GCC plugin infrastructure	2016-06-07 22:57:10 +02:00
dynamic-debug-howto.txt
edac.txt
efi-stub.txt
eisa.txt
email-clients.txt	Documentation/email-clients.txt: convert it to ReST markup	2016-09-21 15:41:50 -06:00
flexible-arrays.txt
futex-requeue-pi.txt
gcc-plugins.txt	GCC plugin infrastructure	2016-06-07 22:57:10 +02:00
highuid.txt
HOWTO	docs: Clean up bare :: lines	2016-09-20 18:46:36 -06:00
hw_random.txt
hwspinlock.txt
index.rst	docs-rst: sphinxify 802.11 documentation	2016-10-11 16:19:17 -06:00
init.txt
initrd.txt
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
irqflags-tracing.txt
isa.txt	Documentation: Add ISA bus driver documentation	2016-05-02 09:32:04 -07:00
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt	docs: deprecate kernel-doc-nano-HOWTO.txt	2016-07-20 16:45:37 -06:00
kernel-docs.txt	Documentation/kernel-docs.txt: reorder based on timestamp	2016-09-20 18:54:42 -06:00
kernel-documentation.rst	This is the documentation update pull for the 4.9 merge window.	2016-10-04 13:54:07 -07:00
kernel-parameters.txt	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2016-10-14 13:19:30 -07:00
kernel-per-CPU-kthreads.txt	Documenation: update cgroup's document path	2016-08-03 15:43:58 -06:00
kobject.txt
kprobes.txt	Documentation: kprobes: Document jprobes stack copying limitations	2016-08-15 10:19:11 -06:00
kref.txt
kselftest.txt	kselftest: kselftest documentation improvement	2016-09-20 08:58:27 -06:00
ldm.txt
local_ops.txt
lockup-watchdogs.txt
logo.gif
logo.txt
lzo.txt	Documentation: lzo: fix spelling mistakes	2016-04-28 07:23:11 -06:00
magic-number.txt
mailbox.txt
Makefile	samples: move blackfin gptimers-example from Documentation	2016-10-10 07:12:02 -06:00
Makefile.sphinx	doc-rst: generic way to build PDF of sub-folders	2016-09-01 08:49:23 -06:00
ManagementStyle	Documentation/HOWTO: add cross-references to other documents	2016-09-20 18:41:04 -06:00
md-cluster.txt	md-cluster: change array_sectors and update size are not supported	2016-05-04 12:39:35 -07:00
md.txt	Documentation: fix wrong value in md.txt	2016-06-23 08:08:36 -06:00
memory-barriers.txt	locking/Documentation: Fix a typo of example result	2016-08-12 08:24:13 +02:00
memory-hotplug.txt	memory_hotplug: introduce CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE	2016-05-19 19:12:14 -07:00
men-chameleon-bus.txt
module-signing.txt	Documentation/module-signing.txt: Note need for version info if reusing a key	2016-07-27 12:38:00 +09:30
mono.txt
nommu-mmap.txt
ntb.txt
numastat.txt
oops-tracing.txt
padata.txt
parport-lowlevel.txt
parport.txt
percpu-rw-semaphore.txt
phy.txt	phy: core: Allow children node to be overridden	2016-04-29 16:39:39 +02:00
pi-futex.txt
pinctrl.txt	pinctrl: Flag strict is a field in struct pinmux_ops	2016-06-23 10:50:10 +02:00
pnp.txt
preempt-locking.txt
printk-formats.txt
pwm.txt	pwm: Update documentation	2016-05-17 14:48:04 +02:00
ramoops.txt	ramoops: use DT reserved-memory bindings	2016-08-05 11:21:36 -07:00
rbtree.txt
remoteproc.txt	remoteproc: Split driver and consumer dereferencing	2016-10-02 22:50:21 -07:00
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt	Documentation: robust-futexes: fix spelling mistakes	2016-04-28 07:26:41 -06:00
rpmsg.txt	rpmsg: use module_rpmsg_driver in existing drivers and examples	2016-05-06 11:09:01 -07:00
rtc.txt
SAK.txt
SecurityBugs	Documentation/HOWTO: add cross-references to other documents	2016-09-20 18:41:04 -06:00
serial-console.txt
sgi-ioc4.txt
SM501.txt
smsc_ece1099.txt
stable_api_nonsense.txt	Documentation/HOWTO: add cross-references to other documents	2016-09-20 18:41:04 -06:00
stable_kernel_rules.txt	docs-rst: add inter-document cross references	2016-09-21 15:43:09 -06:00
static-keys.txt	jump_labels: Allow array initialisers	2016-09-07 09:41:11 +01:00
SubmitChecklist	docs-rst: add inter-document cross references	2016-09-21 15:43:09 -06:00
SubmittingDrivers	docs-rst: add inter-document cross references	2016-09-21 15:43:09 -06:00
SubmittingPatches	docs-rst: add inter-document cross references	2016-09-21 15:43:09 -06:00
svga.txt
sync_file.txt	Documentation: add doc for sync_file_get_fence()	2016-08-11 15:33:24 +05:30
sysfs-rules.txt
sysrq.txt	Doc: correct the location of sysrq.c	2016-04-28 08:02:36 -06:00
this_cpu_ops.txt
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt
VGA-softcursor.txt
video-output.txt
vme_api.txt	vme: Update documentation to match api	2016-08-31 13:20:16 +02:00
volatile-considered-harmful.txt
workqueue.txt	workqueue: Fix a typo in workqueue.txt	2016-07-06 02:37:38 -06:00
xillybus.txt	Documentation: xillybus: fix spelling mistake	2016-04-28 07:44:54 -06:00
xz.txt
zorro.txt