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NeilBrown e2342ca832 md: fix refcount problem on mddev when stopping array. 
md_open() gets a counted reference on an mddev using mddev_find().
If it ends up returning an error, it must drop this reference.

There are two error paths where the reference is not dropped.
One only happens if the process is signalled and an awkward time,
which is quite unlikely.
The other was introduced recently in commit af8d8e6f0.

Change the code to ensure the drop the reference when returning an error,
and make it harded to re-introduce this sort of bug in the future.

Reported-by: Marc Smith <marc.smith@mcc.edu>
Fixes: af8d8e6f0315 ("md: changes for MD_STILL_CLOSED flag")
Signed-off-by: NeilBrown <neilb@suse.com>
Acked-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
2016-12-05 17:11:03 -08:00
..
accessibility
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acpi
Merge branches 'acpica-fixes', 'acpi-pci-fixes' and 'acpi-apei-fixes'
2016-10-29 01:58:03 +02:00
amba
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android
ANDROID: binder: Clear binder and cookie when setting handle in flat binder struct
2016-10-24 19:37:48 +02:00
ata
ahci: fix the single MSI-X case in ahci_init_one
2016-10-25 11:43:07 -04:00
atm
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auxdisplay
auxdisplay: img-ascii-lcd: driver for simple ASCII LCD displays
2016-10-06 17:03:41 +02:00
base
driver core: Make Kconfig text for DEBUG_TEST_DRIVER_REMOVE stronger
2016-10-27 17:47:12 +02:00
bcma
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block
virtio_blk: Delete an unnecessary initialisation in init_vq()
2016-10-31 00:21:47 +02:00
bluetooth
Bluetooth: btwilink: Fix probe return value
2016-10-20 10:14:49 +02:00
bus
bus: qcom-ebi2: depend on ARCH_QCOM or COMPILE_TEST
2016-10-17 13:46:09 -07:00
cdrom
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char
virtio: tests, fixes and cleanups
2016-11-01 16:56:05 -06:00
clk
clk: at91: Fix a return value in case of error
2016-10-20 16:37:56 -07:00
clocksource
Revert "clocksource/drivers/timer_sun5i: Replace code by clocksource_mmio_init"
2016-10-20 21:58:58 +02:00
connector
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cpufreq
Merge branches 'pm-cpufreq-fixes' and 'pm-sleep-fixes'
2016-10-29 01:29:17 +02:00
cpuidle
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2016-10-15 09:26:12 -07:00
crypto
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2016-10-10 14:04:16 -07:00
dax
device-dax: fix percpu_ref_exit ordering
2016-10-27 17:04:05 -07:00
dca
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devfreq
PM / devfreq: Skip status update on uninitialized previous_freq
2016-10-11 00:01:20 +02:00
dio
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dma
dmaengine updates for 4.8-rc1
2016-10-06 17:13:54 -07:00
dma-buf
Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux
2016-10-11 18:12:22 -07:00
edac
* Altera Arria10 enablement of NAND, DMA, USB, QSPI and SD-MMC FIFO
2016-10-04 12:06:26 -07:00
eisa
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extcon
extcon: qcom-spmi-misc: Sync the extcon state on interrupt
2016-10-26 16:04:29 +09:00
firewire
firewire: net: fix fragmented datagram_size off-by-one
2016-11-03 14:46:39 +01:00
firmware
efi/arm: Fix absolute relocation detection for older toolchains
2016-10-19 14:49:44 +02:00
fmc
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fpga
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gpio
gpio/mvebu: Use irq_domain_add_linear
2016-11-01 19:31:49 +01:00
gpu
Merge tag 'drm-intel-fixes-2016-11-01' of git://anongit.freedesktop.org/drm-intel into drm-fixes
2016-11-03 10:18:20 +10:00
hid
HID: sensor: fix attributes in HID sensor interface
2016-11-05 16:56:09 +01:00
hsi
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hv
hv: do not lose pending heartbeat vmbus packets
2016-10-25 08:52:10 +02:00
hwmon
hwmon: (core) fix resource leak on devm_kcalloc failure
2016-10-24 06:05:13 -07:00
hwspinlock
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hwtracing
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i2c
i2c: core: fix NULL pointer dereference under race condition
2016-11-04 20:36:58 +01:00
ide
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idle
nmi_backtrace: generate one-line reports for idle cpus
2016-10-07 18:46:30 -07:00
iio
First set of IIO fixes for the 4.9 cycle.
2016-10-24 10:50:13 +02:00
infiniband
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-10-29 20:33:20 -07:00
input
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2016-11-05 11:26:11 -07:00
iommu
IOMMU Updates for Linux v4.9
2016-10-11 12:52:41 -07:00
ipack
ipack: print a hex number after a 0x prefix
2016-10-27 18:43:43 -07:00
irqchip
GIC updates for Linux 4.9-rc2
2016-10-21 21:40:29 +02:00
isdn
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leds
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lguest
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lightnvm
Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block
2016-10-07 14:42:05 -07:00
macintosh
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mailbox
Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration
2016-10-06 17:36:53 -07:00
mcb
mcb: Add a dma_device to mcb_device
2016-09-27 12:33:47 +02:00
md
md: fix refcount problem on mddev when stopping array.
2016-12-05 17:11:03 -08:00
media
media fixes for v4.9-rc4
2016-11-05 11:15:09 -07:00
memory
ARM: SoC driver updates for v4.9
2016-10-07 21:23:40 -07:00
memstick
memstick: rtsx_usb_ms: Manage runtime PM when accessing the device
2016-10-17 15:43:05 +02:00
message
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mfd
- Core Frameworks
2016-10-07 08:35:35 -07:00
misc
Char/Misc driver fixes for 4.9-rc3
2016-10-29 11:19:02 -07:00
mmc
mmc: sdhci-msm: Fix error return code in sdhci_msm_probe()
2016-10-27 09:43:01 +02:00
mtd
MTD updates for 4.9-rc4:
2016-11-05 10:52:29 -07:00
net
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-10-29 20:33:20 -07:00
nfc
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ntb
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nubus
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nvdimm
nvdimm: make CONFIG_NVDIMM_DAX 'bool'
2016-10-27 16:16:21 -07:00
nvme
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
2016-10-21 10:54:01 -07:00
nvmem
ARM: SoC driver updates for v4.9
2016-10-07 21:23:40 -07:00
of
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2016-10-15 09:26:12 -07:00
oprofile
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
parisc
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parport
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pci
pci-v4.9-fixes-2
2016-11-05 11:11:31 -07:00
pcmcia
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perf
perf: xgene: Remove bogus IS_ERR() check
2016-10-17 15:50:07 +01:00
phy
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pinctrl
pinctrl: intel: Only restore pins that are used by the driver
2016-10-18 14:38:16 +02:00
platform
platform-drivers-x86 for 4.9-2
2016-10-19 11:45:06 -07:00
pnp
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power
power supply and reset changes for the v4.9 series
2016-10-06 18:21:15 -07:00
powercap
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pps
pps: kc: fix non-tickless system config dependency
2016-10-11 15:06:32 -07:00
ps3
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ptp
drivers/ptp: Fix kernel memory disclosure
2016-10-13 10:20:06 -04:00
pwm
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rapidio
mm: replace get_user_pages() write/force parameters with gup_flags
2016-10-19 08:11:43 -07:00
ras
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regulator
regulator: core: silence warning: "VDD1: ramp_delay not set"
2016-10-28 18:22:40 +01:00
remoteproc
rpmsg updates for v4.9
2016-10-06 17:03:49 -07:00
reset
reset: uniphier: rename MIO reset to SD reset for Pro5, PXs2, LD20 SoCs
2016-10-22 18:31:42 +09:00
rpmsg
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rtc
RTC for 4.9
2016-10-14 13:13:44 -07:00
s390
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2016-10-27 14:16:30 -07:00
sbus
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scsi
SCSI fixes on 20161105
2016-11-05 11:28:21 -07:00
sfi
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sh
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sn
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soc
powerpc updates for 4.9 #2
2016-10-14 11:07:42 -07:00
spi
Merge remote-tracking branches 'spi/fix/dt', 'spi/fix/fsl-dspi' and 'spi/fix/fsl-espi' into spi-linus
2016-10-29 12:51:55 -06:00
spmi
spmi: pmic-arb: Return an error code if sanity check fails
2016-09-27 12:43:34 +02:00
ssb
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staging
media fixes for v4.9-rc4
2016-11-05 11:15:09 -07:00
target
target/tcm_fc: use CPU affinity for responses
2016-10-21 01:19:44 -07:00
tc
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thermal
thermal/powerclamp: correct cpu support check
2016-10-20 14:15:44 +08:00
thunderbolt
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tty
tty: serial_core: fix NULL struct tty pointer access in uart_write_wakeup
2016-10-28 08:13:07 -04:00
uio
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usb
usb: chipidea: host: fix NULL ptr dereference during shutdown
2016-10-25 16:14:32 +08:00
uwb
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vfio
vfio/pci: Fix integer overflows, bitmask check
2016-10-26 13:49:29 -06:00
vhost
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video
Merge branch 'gup_flag-cleanups'
2016-10-19 08:39:47 -07:00
virt
mm: replace get_user_pages() write/force parameters with gup_flags
2016-10-19 08:11:43 -07:00
virtio
virtio_ring: mark vring_dma_dev inline
2016-10-31 00:40:08 +02:00
vlynq
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vme
vme: vme_get_size potentially returning incorrect value on failure
2016-10-28 08:25:18 -04:00
w1
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watchdog
Merge branches 'acpi-wdat' and 'acpi-cppc'
2016-10-21 22:24:23 +02:00
xen
xen: fixes for 4.9-rc2
2016-10-24 19:52:24 -07:00
zorro
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Kconfig
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Makefile
A small bug fix and a new driver for acting as an IPMI device.
2016-10-23 15:56:23 -07:00