Richard W.M. Jones 3e42979e65 procfs: expose umask in /proc/<PID>/status ... It's not possible to read the process umask without also modifying it, which is what umask(2) does. A library cannot read umask safely, especially if the main program might be multithreaded. Add a new status line ("Umask") in /proc/<PID>/status. It contains the file mode creation mask (umask) in octal. It is only shown for tasks which have task->fs. This patch is adapted from one originally written by Pierre Carrier. The use case is that we have endless trouble with people setting weird umask() values (usually on the grounds of "security"), and then everything breaking. I'm on the hook to fix these. We'd like to add debugging to our program so we can dump out the umask in debug reports. Previous versions of the patch used a syscall so you could only read your own umask. That's all I need. However there was quite a lot of push-back from those, so this new version exports it in /proc. See: https://lkml.org/lkml/2016/4/13/704 [umask2] https://lkml.org/lkml/2016/4/13/487 [getumask] Signed-off-by: Richard W.M. Jones <rjones@redhat.com> Acked-by: Konstantin Khlebnikov <koct9i@gmail.com> Acked-by: Jerome Marchand <jmarchan@redhat.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Michal Hocko <mhocko@kernel.org> Cc: Pierre Carrier <pierre@spotify.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-05-20 17:58:30 -07:00
..
ABI	zram: introduce per-device debug_stat sysfs node	2016-05-20 17:58:30 -07:00
accounting	taskstats: fix nl parsing in accounting/getdelays.c	2016-04-27 12:50:14 -04:00
acpi	ACPI / tables: Convert initrd table override to table upgrade mechanism	2016-04-18 23:59:09 +02:00
aoe
arm	Documentation: fix common spelling mistakes	2016-04-28 07:51:59 -06:00
arm64	IOMMU Updates for Linux v4.7	2016-05-19 17:07:04 -07:00
auxdisplay
backlight
blackfin
block	The most interesting thing (IMO) this time around is some beginning	2016-05-19 18:07:25 -07:00
blockdev	zram: introduce per-device debug_stat sysfs node	2016-05-20 17:58:30 -07:00
bus-devices
cdrom
cgroup-v1	Documentation/memcg: update kmem limit doc as codes behavior	2016-05-14 10:12:45 -06:00
cma
connector	samples: connector: from Documentation to samples directory	2016-04-28 07:47:35 -06:00
console
cpu-freq	Documentation: cpufreq: intel_pstate: fix typo	2016-02-18 20:31:53 +01:00
cpuidle
cris
crypto	crypto: doc - Use ahash	2016-02-06 15:33:11 +08:00
development-process
device-mapper	dm stats: fix spelling mistake in Documentation	2016-05-05 15:25:54 -04:00
devicetree	- New Drivers	2016-05-20 11:10:24 -07:00
dmaengine	Merge branch 'topic/async' into for-linus	2016-01-06 15:17:47 +05:30
DocBook	Merge branch 'akpm' (patches from Andrew)	2016-05-19 20:00:06 -07:00
driver-model	- New Drivers	2016-05-20 11:10:24 -07:00
dvb	[media] media: change email address	2016-01-25 12:01:08 -02:00
early-userspace
EDID
extcon
fault-injection	net: Add support for CHANGEUPPER notifier error injection	2015-12-03 11:49:23 -05:00
fb	Documentation: fb: fix spelling mistakes	2016-05-10 12:05:27 +03:00
features	powerpc: Add HAVE_PERF_USER_STACK_DUMP support	2016-05-11 21:54:05 +10:00
filesystems	procfs: expose umask in /proc/<PID>/status	2016-05-20 17:58:30 -07:00
firmware_class	Documentation: fix common spelling mistakes	2016-04-28 07:51:59 -06:00
fmc
fpga	usage documentation for FPGA manager core	2015-10-07 18:07:20 +01:00
frv
gpio	gpio: clarify open drain/source docs	2016-04-27 10:23:44 +02:00
hid
hwmon	The most interesting thing (IMO) this time around is some beginning	2016-05-19 18:07:25 -07:00
i2c	[media] rtl2832: change the i2c gate to be mux-locked	2016-05-04 22:40:02 +02:00
ia64
ide
iio	iio: Documentation: Add IIO configfs documentation	2015-12-03 18:19:28 +00:00
infiniband	Documentation: fix common spelling mistakes	2016-04-28 07:51:59 -06:00
input	Input: clarify we want BTN_TOOL_<name> on proximity	2016-04-06 10:23:09 -07:00
ioctl	gpio: uapi: use 0xB4 as ioctl() major	2016-03-10 16:02:52 +07:00
isdn	isdn: i4l: move active-isdn drivers to staging	2016-03-05 15:00:38 -08:00
ja_JP	Documentatio: HOWTO: remove regression postings info from translations	2016-04-16 10:49:08 -06:00
kbuild	kbuild: document recursive dependency limitation / resolution	2015-10-08 15:36:16 +02:00
kdump	ARM: kexec: fix crashkernel= handling	2016-05-03 11:13:45 +01:00
ko_KR	Documentation: HOWTO: update git home URL in translations	2016-04-16 10:49:18 -06:00
laptops	Documentation: laptops: fix spelling mistake	2016-04-28 07:21:48 -06:00
leds	Documentation: leds: Add description of brightness setting API	2016-01-04 09:57:31 +01:00
livepatch	Merge branches 'for-4.7/core', 'for-4.7/livepatching-doc' and 'for-4.7/livepatching-ppc64' into for-linus	2016-05-17 12:06:35 +02:00
locking	locking/Documentation/lockdep: Fix spelling mistakes	2016-04-28 10:40:57 +02:00
m68k
memory-devices
metag
mic	Char/Misc patches for 4.6-rc1	2016-03-17 13:47:50 -07:00
mips
misc-devices	Merge char-misc-next into staging-next	2016-02-22 14:46:24 -08:00
mmc	Documentation: mmc: Add the introduction for mmc-utils	2016-03-31 00:54:22 -06:00
mn10300
mtd	Documentation: mtd: improve nand_ecc.txt for readability and correctness	2015-11-17 17:05:14 -08:00
namespaces
netlabel
networking	The most interesting thing (IMO) this time around is some beginning	2016-05-19 18:07:25 -07:00
nfc	NFC: Fix typo in nfc-hci.txt	2015-06-08 23:15:45 +02:00
nios2
nvdimm	libnvdimm: documentation clarifications	2015-11-12 09:55:23 -08:00
nvmem	Documentation: nvmem: add nvmem api level and how-to doc	2015-08-05 13:43:45 -07:00
parisc
PCI
pcmcia	pcmcia: Fix typo in locking documentation	2015-08-07 14:34:58 +02:00
phy
platform
power	PM / runtime: Document steps for device removal	2016-04-05 03:46:59 +02:00
powerpc	powerpc/eeh: rename EEH from "extended" to "enhanced" error handling	2016-04-11 20:30:42 +10:00
pps	Documentation: pps: fix spelling mistake	2016-04-28 07:23:59 -06:00
prctl	Documentation: Fix int/unsigned int comparison	2016-02-17 14:09:43 -07:00
pti
ptp	Another relatively boring cycle for the docs tree: typo fixes, translation	2016-03-17 12:09:35 -07:00
rapidio	rapidio: add mport char device driver	2016-03-22 15:36:02 -07:00
RCU	The most interesting thing (IMO) this time around is some beginning	2016-05-19 18:07:25 -07:00
s390	s390/zcore: remove /sys/kernel/debug/zcore/mem	2015-11-27 09:24:12 +01:00
scheduler
scsi	The most interesting thing (IMO) this time around is some beginning	2016-05-19 18:07:25 -07:00
security	The most interesting thing (IMO) this time around is some beginning	2016-05-19 18:07:25 -07:00
serial	serial: doc: Use port->state instead of info	2016-05-14 10:18:25 -06:00
sh
sound	ALSA: compress: fix some typo	2016-05-08 11:27:44 +02:00
spi	spi: tools: move spidev_test metadata	2015-11-30 12:14:12 +00:00
sysctl	mm: /proc/sys/vm/stat_refresh to force vmstat update	2016-05-19 19:12:14 -07:00
target	target/user: Report capability of handling out-of-order completions to userspace	2016-03-10 21:49:09 -08:00
thermal	thermal: doc: Add details of devm_thermal_zone_of_sensor_{register,unregister}	2016-03-09 10:51:41 -08:00
timers	Documentation: fix common spelling mistakes	2016-04-28 07:51:59 -06:00
tpm
trace	This includes two new updates for the ftrace infrastructure.	2016-05-18 18:55:19 -07:00
usb	doc: usb: Fix typo in gadget_multi documentation	2016-04-15 15:45:19 -06:00
vDSO	Documentation/vDSO: don't build tests when cross compiling	2015-06-22 16:04:57 -06:00
video4linux	The most interesting thing (IMO) this time around is some beginning	2016-05-19 18:07:25 -07:00
virtual	kvm: introduce KVM_MAX_VCPU_ID	2016-05-11 22:37:54 +02:00
vm	z3fold: the 3-fold allocator for compressed pages	2016-05-20 17:58:30 -07:00
w1	w1: masters: omap_hdq: add support for 1-wire mode	2015-10-05 04:47:09 +01:00
watchdog	Merge git://www.linux-watchdog.org/linux-watchdog	2016-03-19 19:35:51 -07:00
wimax
x86	The most interesting thing (IMO) this time around is some beginning	2016-05-19 18:07:25 -07:00
xtensa
zh_CN	Documentation:Update Documentation/zh_CN/arm64/booting.txt	2016-04-28 07:15:36 -06:00
00-INDEX
adding-syscalls.txt	documentation: trivial typo: adding-syscalls.txt: s/statat/fstatat/	2016-04-18 11:31:49 -06:00
applying-patches.txt
assoc_array.txt
atomic_ops.txt	locking/atomics, cmpxchg: Privatize the inclusion of asm/cmpxchg.h	2015-09-13 10:35:46 +02:00
bad_memory.txt
basic_profiling.txt
bcache.txt
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt
cgroup-v2.txt	Merge branch 'for-4.6-ns' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2016-03-21 10:05:13 -07:00
Changes	There is a nice new document from Neil on how pathname lookups work and	2015-11-05 15:59:24 -08:00
circular-buffers.txt
clk.txt	clk: change clk_ops' ->determine_rate() prototype	2015-07-27 18:12:01 -07:00
coccinelle.txt
CodeOfConflict
CodingStyle	Documentation/CodingStyle: add space before parenthesis in example macro	2016-01-25 12:36:28 -07:00
cpu-hotplug.txt	Documentation: cpu-hotplug: Fix sysfs mount instructions	2015-12-10 11:35:30 -07:00
cpu-load.txt
cputopology.txt	Documentation: Update cputopology.txt	2015-05-27 15:22:15 +02:00
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt	Doc: Change wikipedia's URL from http to https	2015-06-22 10:14:05 -06:00
dell_rbu.txt
devices.txt
digsig.txt
DMA-API-HOWTO.txt	dma-mapping: always provide the dma_map_ops based implementation	2016-01-20 17:09:18 -08:00
DMA-API.txt	DMA-API: fix confusing sentence in Documentation/DMA-API.txt	2016-01-11 18:29:00 -07:00
DMA-attributes.txt	ARM: 8506/1: common: DMA-mapping: add DMA_ATTR_ALLOC_SINGLE_PAGES attribute	2016-02-11 15:33:38 +00:00
dma-buf-sharing.txt	dma-buf: Update docs for SYNC ioctl	2016-03-21 09:26:45 +01:00
DMA-ISA-LPC.txt
dontdiff	Documentation: dontdiff: remove media from dontdiff	2015-11-11 10:08:07 -07:00
dynamic-debug-howto.txt
edac.txt	EDAC: Remove references to bluesmoke.sourceforge.net	2015-11-26 14:46:06 +01:00
efi-stub.txt	doc: efi-stub.txt: Fix arm64 paths	2015-12-14 15:24:03 +00:00
eisa.txt
email-clients.txt	A few more documentation patches that wandered in and have no reason to	2015-11-13 09:19:05 -08:00
flexible-arrays.txt
futex-requeue-pi.txt
gcov.txt
gdb-kernel-debugging.txt
highuid.txt
HOWTO	Documentation: Howto: Fixed subtitles style	2016-03-09 15:30:03 -07:00
hsi.txt
hw_random.txt	hwrng: doc - Fix device node name reference /dev/hw_random => /dev/hwrng	2015-09-21 22:00:41 +08:00
hwspinlock.txt
init.txt
initrd.txt
intel_txt.txt
Intel-IOMMU.txt	iommu/vt-d: Fix link to Intel IOMMU Specification	2016-01-29 12:32:12 +01:00
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt	ipmi watchdog : add panic_wdt_timeout parameter	2015-11-16 06:28:43 -06:00
IRQ-affinity.txt
IRQ-domain.txt	Documentation/IRQ-domain.txt: Document irq_domain_create_{linear, tree}	2016-03-31 00:32:59 -06:00
IRQ.txt
irqflags-tracing.txt
isapnp.txt
java.txt
kasan.txt	mm, kasan: SLAB support	2016-03-25 16:37:42 -07:00
kcov.txt	kernel: add kcov code coverage	2016-03-22 15:36:02 -07:00
kernel-doc-nano-HOWTO.txt	Documenation: Update location of docproc.c	2015-07-14 12:36:39 -06:00
kernel-docs.txt	Documentation: update Michael K. Johnson's work	2016-04-15 15:37:25 -06:00
kernel-parameters.txt	Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm	2016-05-20 10:01:38 -07:00
kernel-per-CPU-kthreads.txt	irq_poll: make blk-iopoll available outside the block layer	2015-12-11 11:52:24 -08:00
kmemcheck.txt
kmemleak.txt	Doc: Change wikipedia's URL from http to https	2015-06-22 10:14:05 -06:00
kobject.txt
kprobes.txt
kref.txt
kselftest.txt	Documentation: kselftest: Remove duplicate word	2016-03-09 15:33:38 -07:00
ldm.txt
local_ops.txt
lockup-watchdogs.txt	kernel/watchdog.c: add sysctl knob hardlockup_panic	2015-11-05 19:34:48 -08:00
logo.gif
logo.txt
lzo.txt	Documentation: lzo: fix spelling mistakes	2016-04-28 07:23:11 -06:00
magic-number.txt
mailbox.txt	Documentation: minor typo fix in mailbox.txt	2015-08-13 18:03:18 -06:00
Makefile	[media] samples: v4l: from Documentation to samples directory	2016-05-09 18:34:37 -03:00
ManagementStyle
md-cluster.txt	md-cluster: change array_sectors and update size are not supported	2016-05-04 12:39:35 -07:00
md.txt	doc:md: fix typo in md.txt.	2015-06-23 06:49:44 -06:00
memory-barriers.txt	locking/Documentation: Clarify that ACQUIRE applies to loads, RELEASE applies to stores	2016-04-28 10:57:51 +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	Documentation: Minor changes to men-chameleon-bus.txt	2015-07-24 15:15:17 +02:00
module-signing.txt	modsign: Fix documentation on module signing enforcement parameter.	2016-03-12 01:48:11 -07:00
mono.txt
nommu-mmap.txt
ntb.txt	NTB: Rename Intel code names to platform names	2015-07-04 14:09:25 -04:00
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
pnp.txt
preempt-locking.txt
printk-formats.txt	mm, printk: introduce new format string for flags	2016-03-15 16:55:16 -07:00
pwm.txt
ramoops.txt
rbtree.txt	documentation: fix small typo in rbtree.txt	2015-09-13 14:38:50 -06:00
remoteproc.txt	remoteproc: introduce rproc_get_by_phandle API	2015-06-16 21:12:52 +03:00
rfkill.txt	rfkill: Add documentation about LED triggers	2016-02-24 09:13:12 +01:00
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	rtc: implement a sysfs interface for clock offset	2016-03-14 17:08:16 +01:00
SAK.txt
SecurityBugs
serial-console.txt
sgi-ioc4.txt
SM501.txt
smsc_ece1099.txt
sparse.txt
stable_api_nonsense.txt
stable_kernel_rules.txt	stable_kernel_rules.txt: Remove extra space after Cc:	2015-11-20 16:54:57 -07:00
static-keys.txt	locking/static_keys: Fix up the static keys documentation	2015-09-15 07:12:06 +02:00
SubmitChecklist
SubmittingDrivers
SubmittingPatches	SubmittingPatches: fix spelling of "git send-email"	2016-01-25 12:30:18 -07:00
svga.txt
sysfs-rules.txt
sysrq.txt	Doc: correct the location of sysrq.c	2016-04-28 08:02:36 -06:00
this_cpu_ops.txt
ubsan.txt	UBSAN: run-time undefined behavior sanity checker	2016-01-20 17:09:18 -08:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt	vfio: powerpc/spapr: Support Dynamic DMA windows	2015-06-11 15:16:55 +10:00
VGA-softcursor.txt
vgaarbiter.txt
video-output.txt
vme_api.txt	Documentation: mention vme_master_mmap() in VME API	2015-06-12 17:26:56 -07:00
volatile-considered-harmful.txt
workqueue.txt
xillybus.txt	Documentation: xillybus: fix spelling mistake	2016-04-28 07:44:54 -06:00
xz.txt
zorro.txt