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
cpuidle
cris
crypto
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
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
early-userspace
EDID
extcon
fault-injection
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
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
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
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
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
namespaces
netlabel
networking	The most interesting thing (IMO) this time around is some beginning	2016-05-19 18:07:25 -07:00
nfc
nios2
nvdimm
nvmem
parisc
PCI
pcmcia
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
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
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
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
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
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
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
circular-buffers.txt
clk.txt
coccinelle.txt
CodeOfConflict
CodingStyle
cpu-hotplug.txt
cpu-load.txt
cputopology.txt
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
devices.txt
digsig.txt
DMA-API-HOWTO.txt
DMA-API.txt
DMA-attributes.txt
dma-buf-sharing.txt	dma-buf: Update docs for SYNC ioctl	2016-03-21 09:26:45 +01:00
DMA-ISA-LPC.txt
dontdiff
dynamic-debug-howto.txt
edac.txt
efi-stub.txt
eisa.txt
email-clients.txt
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
hwspinlock.txt
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	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
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
kmemcheck.txt
kmemleak.txt
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
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	[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
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
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
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
remoteproc.txt
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
static-keys.txt
SubmitChecklist
SubmittingDrivers
SubmittingPatches
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
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt
VGA-softcursor.txt
vgaarbiter.txt
video-output.txt
vme_api.txt
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