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OpenCloudOS-Kernel
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Brian Bloniarz 0f40fbbcc3 Fix OpenSSH pty regression on close 
OpenSSH expects the (non-blocking) read() of pty master to return
EAGAIN only if it has received all of the slave-side output after
it has received SIGCHLD. This used to work on pre-3.12 kernels.

This fix effectively forces non-blocking read() and poll() to
block for parallel i/o to complete for all ttys. It also unwinds
these changes:

1) f8747d4a46
   tty: Fix pty master read() after slave closes

2) 52bce7f8d4
   pty, n_tty: Simplify input processing on final close

3) 1a48632ffe
   pty: Fix input race when closing

Inspired by analysis and patch from Marc Aurele La France <tsi@tuyoix.net>

Reported-by: Volth <openssh@volth.com>
Reported-by: Marc Aurele La France <tsi@tuyoix.net>
BugLink: https://bugzilla.mindrot.org/show_bug.cgi?id=52
BugLink: https://bugzilla.mindrot.org/show_bug.cgi?id=2492
Signed-off-by: Brian Bloniarz <brian.bloniarz@gmail.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2016-05-01 13:22:54 -07:00
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accessibility
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acpi Merge branch 'acpi-processor' 2016-04-02 01:17:36 +02:00
amba
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android
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ata Merge branch 'for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2016-03-18 20:06:46 -07:00
atm Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2016-03-17 21:38:27 -07:00
auxdisplay
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base PM / wakeirq: fix wakeirq setting after wakup re-configuration from sysfs 2016-04-07 22:23:47 +02:00
bcma bcma: fix building without OF_IRQ 2016-03-23 17:52:10 +02:00
block Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2016-04-15 15:44:10 -07:00
bluetooth
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bus mvebu fixes for 4.6 (part 1) 2016-04-12 12:35:07 -07:00
cdrom
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char tty: Replace ASYNC_INITIALIZED bit and update atomically 2016-04-30 09:26:55 -07:00
clk clk: qcom: ipq4019: add some fixed clocks for ddrppl and fepll 2016-03-29 16:31:16 -07:00
clocksource Merge branches 'perf-urgent-for-linus', 'smp-urgent-for-linus' and 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-04-23 11:45:52 -07:00
connector
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cpufreq Merge branch 'pm-cpufreq-fixes' 2016-04-21 20:57:46 +02:00
cpuidle cpuidle: menu: Fall back to polling if next timer event is near 2016-03-21 15:50:28 +01:00
crypto crypto: ccp - Prevent information leakage on export 2016-04-15 22:13:56 +08:00
dca
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devfreq PM / devfreq: Spelling s/frequnecy/frequency/ 2016-03-17 02:30:16 +01:00
dio
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dma Merge branch 'fix/edma' into fixes 2016-04-16 22:52:03 +05:30
dma-buf dma-buf: Update docs for SYNC ioctl 2016-03-21 09:26:45 +01:00
edac x86 EDAC, sb_edac.c: Take account of channel hashing when needed 2016-04-22 10:10:01 +02:00
eisa
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extcon extcon: palmas: Drop stray IRQF_EARLY_RESUME flag 2016-04-04 08:32:45 +09:00
firewire IEEE 1394 subsystem patch: 2016-03-25 08:52:25 -07:00
firmware Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-04-16 15:37:05 -07:00
fmc
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fpga
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gpio gpio: pca953x: Use correct u16 value for register word write 2016-04-08 11:49:47 +02:00
gpu Merge branch 'drm-fixes-4.6' of git://people.freedesktop.org/~agd5f/linux into drm-fixes 2016-04-22 10:39:26 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2016-04-11 12:31:09 -07:00
hsi
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hv Char/Misc patches for 4.6-rc1 2016-03-17 13:47:50 -07:00
hwmon hwmon: (max1111) Return -ENODEV from max1111_read_channel if not instantiated 2016-03-27 10:37:48 -07:00
hwspinlock
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hwtracing
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i2c i2c: jz4780: really prevent potential division by zero 2016-04-09 08:36:44 +02:00
ide ide: palm_bk3710: test clock rate to avoid division by 0 2016-03-20 16:59:27 -04:00
idle intel_idle: Add KBL support 2016-04-07 22:11:08 +02:00
iio Second set of IIO fixes for the 4.6 cycle. 2016-04-04 13:45:10 -07:00
infiniband Revert "ib_srpt: Convert to percpu_ida tag allocation" 2016-04-07 18:16:20 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2016-04-23 11:04:26 -07:00
iommu iommu/arm-smmu: Don't allocate resources for bypass domains 2016-04-21 16:47:32 +02:00
ipack tty: Replace ASYNC_INITIALIZED bit and update atomically 2016-04-30 09:26:55 -07:00
irqchip irqchip/mips-gic: Don't overrun pcpu_masks array 2016-04-21 21:04:29 +02:00
isdn tty: Replace ASYNC_INITIALIZED bit and update atomically 2016-04-30 09:26:55 -07:00
leds platform-drivers-x86 for 4.6-1 2016-03-23 17:20:59 -07:00
lguest lguest, x86/entry/32: Fix handling of guest syscalls using interrupt gates 2016-04-01 08:58:13 +02:00
lightnvm lightnvm: do not load L2P table if not supported 2016-03-18 18:10:38 -07:00
macintosh
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mailbox Merge branch 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2016-04-14 18:40:47 -07:00
mcb
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md dm cache metadata: fix cmd_read_lock() acquiring write lock 2016-04-17 11:24:46 -04:00
media media fixes for v4.6-rc2 2016-04-05 06:47:50 -07:00
memory MTD updates for v4.6 2016-03-24 19:57:15 -07:00
memstick drivers/memstick/host/r592.c: avoid gcc-6 warning 2016-03-25 16:37:42 -07:00
message
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mfd - New Drivers 2016-03-18 10:15:11 -07:00
misc lkdtm: do not leak free page on kmalloc failure 2016-04-06 16:22:25 -07:00
mmc tty: Replace TTY_THROTTLED bit tests with tty_throttled() 2016-04-30 09:26:55 -07:00
mtd One MTD fix for v4.6-rc4: 2016-04-15 15:25:09 -07:00
net tty: Replace TTY_THROTTLED bit tests with tty_throttled() 2016-04-30 09:26:55 -07:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-03-19 10:05:34 -07:00
ntb NTB: Remove _addr functions from ntb_hw_amd 2016-03-26 11:44:33 -04:00
nubus
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nvdimm libnvdimm, pmem: clarify the write+clear_poison+write flow 2016-04-15 14:59:41 -06:00
nvme NVMe: Always use MSI/MSI-x interrupts 2016-04-14 14:04:50 -06:00
nvmem
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of DeviceTree updates for 4.6: 2016-03-19 15:15:07 -07:00
oprofile mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros 2016-04-04 10:41:08 -07:00
parisc PCI changes for the v4.6 merge window: 2016-03-16 14:45:55 -07:00
parport
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pci PCI updates for v4.6: 2016-04-18 19:52:47 -07:00
pcmcia pcmcia: db1xxx_ss: fix last irq_to_gpio user 2016-03-29 22:48:53 +02:00
perf drivers/perf: arm-pmu: fix RCU usage on pmu resume from low-power 2016-04-21 15:03:06 +01:00
phy phy: rockchip-emmc: should be a child device of the GRF 2016-04-13 18:33:05 +05:30
pinctrl pinctrl: single: Fix pcs_parse_bits_in_pinctrl_entry to use __ffs than ffs 2016-04-15 11:26:55 +02:00
platform platform-drivers-x86 for 4.6-2 2016-04-21 08:23:59 -07:00
pnp
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power Power management and ACPI material for v4.6-rc1, part 2 2016-03-25 16:55:37 -07:00
powercap powercap: intel_rapl: Add missing Haswell model 2016-04-05 03:44:48 +02:00
pps
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ps3
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ptp Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-15 12:13:56 -07:00
pwm pwm: fsl-ftm: Use flat regmap cache 2016-04-14 16:54:00 +02:00
rapidio Convert straggling drivers to new six-argument get_user_pages() 2016-04-02 18:35:05 -05:00
ras
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regulator - New Drivers 2016-03-18 10:15:11 -07:00
remoteproc remoteproc: st: fix check of syscon_regmap_lookup_by_phandle() return value 2016-03-28 16:19:00 -07:00
reset
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rpmsg
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rtc rtc: ds1307: Use irq when available for wakeup-source device 2016-04-21 23:21:00 +02:00
s390 tty: Replace ASYNC_INITIALIZED bit and update atomically 2016-04-30 09:26:55 -07:00
sbus
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scsi SCSI fixes on 20160408 2016-04-09 12:00:42 -07:00
sfi
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sh
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sn
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soc ARM: SoC driver updates for v4.6 2016-03-20 15:40:32 -07:00
spi Merge remote-tracking branches 'spi/fix/omap2' and 'spi/fix/rockchip' into spi-linus 2016-04-04 10:05:49 -07:00
spmi
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ssb
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staging tty: Replace TTY_THROTTLED bit tests with tty_throttled() 2016-04-30 09:26:55 -07:00
target target: add a new add_wwn_groups fabrics method 2016-03-30 20:06:44 -07:00
tc
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thermal thermal: fix Mediatek thermal controller build 2016-04-20 21:13:21 -07:00
thunderbolt
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tty Fix OpenSSH pty regression on close 2016-05-01 13:22:54 -07:00
uio
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usb tty: vt, make color_table const 2016-04-30 09:26:55 -07:00
uwb
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vfio VFIO updates for v4.6-rc1 2016-03-17 13:05:09 -07:00
vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2016-03-22 12:41:14 -07:00
video tty: vt, make color_table const 2016-04-30 09:26:55 -07:00
virt
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virtio virtio: virtio 1.0 cs04 spec compliance for reset 2016-04-07 15:16:39 +03:00
vlynq
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vme
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w1
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watchdog hpwdt: use nmi_panic() when kernel panics in NMI handler 2016-03-22 15:36:02 -07:00
xen xen/events: Mask a moving irq 2016-04-04 11:18:00 +01:00
zorro
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Kconfig
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Makefile
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