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c45b5d24fe
linux/drivers
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Daniel Starke c45b5d24fe tty: n_gsm: fix user open not possible at responder until initiator open 
[ Upstream commit ac77f0077c ]

After setting up the control channel on both sides the responder side may
want to open a virtual tty to listen on until the initiator starts an
application on a user channel. The current implementation allows the
open() but no other operation, like termios. These fail with EINVAL.
The responder sided application has no means to detect an open by the
initiator sided application this way. And the initiator sided applications
usually expect the responder sided application to listen on the user
channel upon open.
Set the user channel into half-open state on responder side once a user
application opens the virtual tty to allow IO operations on it.
Furthermore, keep the user channel constipated until the initiator side
opens it to give the responder sided application the chance to detect the
new connection and to avoid data loss if the responder sided application
starts sending before the user channel is open.

Fixes: e1eaea46bb ("tty: n_gsm line discipline")
Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
Link: https://lore.kernel.org/r/20220701061652.39604-1-daniel.starke@siemens.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-08-21 15:16:06 +02:00
..
accessibility tty: the rest, stop using tty_schedule_flip() 2022-07-29 17:19:28 +02:00
acpi ACPI: APEI: Fix _EINJ vs EFI_MEMORY_SP 2022-08-21 15:15:34 +02:00
amba amba: Make the remove callback return void 2022-04-08 14:40:02 +02:00
android binder: fix handling of error during copy 2022-01-27 10:54:06 +01:00
ata ata: libata-core: fix NULL pointer deref in ata_host_alloc_pinfo() 2022-06-22 14:13:14 +02:00
atm atm: eni: Add check for dma_map_single 2022-03-23 09:13:27 +01:00
auxdisplay
base driver core: fix potential deadlock in __driver_attach 2022-08-21 15:15:55 +02:00
bcma
block null_blk: fix ida error handling in null_add_dev() 2022-08-21 15:16:03 +02:00
bluetooth Bluetooth: hci_intel: Add check for platform_driver_register 2022-08-21 15:15:49 +02:00
bus bus: hisi_lpc: fix missing platform_device_put() in hisi_lpc_acpi_probe() 2022-08-21 15:15:35 +02:00
cdrom
char random: update comment from copy_to_user() -> copy_to_iter() 2022-06-29 08:59:54 +02:00
clk clk: qcom: camcc-sdm845: Fix topology around titan_top power domain 2022-08-21 15:15:56 +02:00
clocksource clocksource/drivers/ixp4xx: remove EXPORT_SYMBOL_GPL from ixp4xx_timer_setup() 2022-07-07 17:52:23 +02:00
connector
counter counter: stm32-lptimer-cnt: remove iio counter abi 2022-01-27 10:54:08 +01:00
cpufreq cpufreq: pmac32-cpufreq: Fix refcount leak bug 2022-07-21 21:20:14 +02:00
cpuidle
crypto crypto: hisilicon/sec - fix auth key size error 2022-08-21 15:15:50 +02:00
dax dax: make sure inodes are flushed before destroy cache 2022-04-08 14:40:16 +02:00
dca
devfreq PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events 2022-07-07 17:52:18 +02:00
dio
dma dmaengine: sf-pdma: Add multithread support for a DMA channel 2022-08-21 15:15:57 +02:00
dma-buf udmabuf: add back sanity check 2022-06-29 08:59:48 +02:00
edac EDAC/ghes: Set the DIMM label unconditionally 2022-08-03 12:00:50 +02:00
eisa
extcon extcon: Modify extcon device to be created after driver data is set 2022-06-14 18:32:43 +02:00
firewire firewire: core: extend card->lock in fw_core_handle_bus_reset 2022-05-12 12:25:32 +02:00
firmware firmware: tegra: Fix error check return value of debugfs_create_file() 2022-08-21 15:15:31 +02:00
fpga fpga: altera-pr-ip: fix unsigned comparison with less than zero 2022-08-21 15:15:53 +02:00
fsi fsi: Aspeed: Fix a potential double free 2022-04-08 14:40:23 +02:00
gnss
gpio gpio: gpiolib-of: Fix refcount bugs in of_mm_gpiochip_add_data() 2022-08-21 15:16:01 +02:00
gpu drm/exynos/exynos7_drm_decon: free resources when clk_set_parent() failed. 2022-08-21 15:15:46 +02:00
greybus greybus: svc: fix an error handling bug in gb_svc_hello() 2022-04-08 14:39:50 +02:00
hid HID: alps: Declare U1_UNICORN_LEGACY support 2022-08-21 15:16:01 +02:00
hsi HSI: core: Fix return freed object in hsi_new_client 2022-01-27 10:54:12 +01:00
hv Drivers: hv: vmbus: Release cpu lock in error case 2022-06-22 14:13:16 +02:00
hwmon hwmon: (drivetemp) Add module alias 2022-08-21 15:15:35 +02:00
hwspinlock
hwtracing intel_th: msu: Fix vmalloced buffers 2022-08-21 15:15:57 +02:00
i2c i2c: mux-gpmux: Add of_node_put() when breaking out of loop 2022-08-21 15:15:49 +02:00
i3c
ide
idle intel_idle: Disable IBRS during long idle 2022-07-25 11:26:43 +02:00
iio iio: accel: bma400: Reordering of header files 2022-08-21 15:15:54 +02:00
infiniband RDMA/rxe: Fix error unwind in rxe_create_qp() 2022-08-21 15:16:03 +02:00
input Input: atmel_mxt_ts - fix up inverted RESET handler 2022-08-21 15:15:32 +02:00
interconnect interconnect: imx: fix max_node_id 2022-08-21 15:16:00 +02:00
iommu iommu/vt-d: Fix PCI bus rescan device hot add 2022-07-12 16:32:18 +02:00
ipack
irqchip irqchip/mips-gic: Check the return value of ioremap() in gic_of_init() 2022-08-21 15:15:29 +02:00
isdn isdn: hfcpci: check the return value of dma_set_mask() in setup_hw() 2022-03-16 14:15:57 +01:00
leds
lightnvm lightnvm: disable the subsystem 2022-05-09 09:04:56 +02:00
macintosh macintosh/adb: fix oob read in do_adb_query() function 2022-08-11 13:06:47 +02:00
mailbox mailbox: forward the hrtimer if not queued and under a lock 2022-06-09 10:21:18 +02:00
mcb
md dm: return early from dm_pr_call() if DM device is suspended 2022-08-21 15:15:37 +02:00
media media: platform: mtk-mdp: Fix mdp_ipi_comm structure alignment 2022-08-21 15:15:46 +02:00
memory memory: samsung: exynos5422-dmc: Fix refcount leak in of_get_dram_timings 2022-06-29 08:59:54 +02:00
memstick memstick/ms_block: Fix a memory leak 2022-08-21 15:15:58 +02:00
message
mfd mfd: davinci_voicecodec: Fix possible null-ptr-deref davinci_vc_probe() 2022-06-09 10:21:18 +02:00
misc eeprom: idt_89hpesx: uninitialized data in idt_dbgfs_csr_write() 2022-08-21 15:16:00 +02:00
mmc mmc: cavium-thunderx: Add of_node_put() when breaking out of loop 2022-08-21 15:16:01 +02:00
most
mtd mtd: st_spi_fsm: Add a clk_disable_unprepare() in .probe()'s error path 2022-08-21 15:15:53 +02:00
mux
net mwifiex: fix sleep in atomic context bugs caused by dev_coredumpv 2022-08-21 15:15:55 +02:00
nfc NFC: nxp-nci: don't print header length mismatch on i2c error 2022-07-21 21:20:14 +02:00
ntb ntb: intel: fix port config status offset for SPR 2022-03-08 19:09:32 +01:00
nubus
nvdimm nvdimm: Fix badblocks clear off-by-one error 2022-07-07 17:52:15 +02:00
nvme nvme: use command_id instead of req->tag in trace_nvme_complete_rq() 2022-08-21 15:16:03 +02:00
nvmem nvmem: core: set size for sysfs bin file 2022-01-27 10:54:22 +01:00
of of: overlay: do not break notify on NOTIFY_{OK|STOP} 2022-06-09 10:21:03 +02:00
opp opp: Fix error check in dev_pm_opp_attach_genpd() 2022-08-21 15:16:04 +02:00
oprofile
parisc parisc: Check the return value of ioremap() in lba_driver_probe() 2022-08-21 15:15:23 +02:00
parport
pci PCI: tegra194: Fix link up retry sequence 2022-08-21 15:16:02 +02:00
pcmcia pcmcia: db1xxx_ss: restrict to MIPS_DB1XXX boards 2022-06-14 18:32:30 +02:00
perf drivers/perf: arm_spe: Fix consistency of SYS_PMSCR_EL1.CX 2022-08-21 15:15:36 +02:00
phy phy: qcom-qmp: fix pipe-clock imbalance on power-on failure 2022-06-14 18:32:32 +02:00
pinctrl pinctrl: stm32: fix optional IRQ support to gpios 2022-07-29 17:19:06 +02:00
platform platform/olpc: Fix uninitialized data in debugfs write 2022-08-21 15:16:02 +02:00
pnp
power power/reset: arm-versatile: Fix refcount leak in versatile_reboot_probe 2022-07-29 17:19:10 +02:00
powercap
pps
ps3
ptp ptp: replace snprintf with sysfs_emit 2022-04-13 21:00:55 +02:00
pwm pwm: lpc18xx-sct: Convert to devm_platform_ioremap_resource() 2022-08-21 15:15:37 +02:00
rapidio
ras
regulator regulator: of: Fix refcount leak bug in of_get_regulation_constraints() 2022-08-21 15:15:36 +02:00
remoteproc remoteproc: k3-r5: Fix refcount leak in k3_r5_cluster_of_init 2022-08-21 15:16:05 +02:00
reset reset: tegra-bpmp: Restore Handle errors in BPMP response 2022-04-27 13:53:52 +02:00
rpmsg rpmsg: mtk_rpmsg: Fix circular locking dependency 2022-08-21 15:16:05 +02:00
rtc rtc: mt6397: check return value after calling platform_get_resource() 2022-06-14 18:32:33 +02:00
s390 block: remove the request_queue to argument request based tracepoints 2022-08-21 15:15:36 +02:00
sbus
scsi scsi: smartpqi: Fix DMA direction for RAID requests 2022-08-21 15:15:59 +02:00
sfi
sh
siox
slimbus slimbus: qcom: Fix IRQ check in qcom_slim_probe 2022-05-18 10:23:47 +02:00
soc soc: qcom: Make QCOM_RPMPD depend on PM 2022-08-21 15:15:36 +02:00
soundwire soundwire: bus_type: fix remove and shutdown support 2022-08-21 15:15:56 +02:00
spi spi: spi-rspi: Fix PIO fallback on RZ platforms 2022-08-21 15:15:31 +02:00
spmi
ssb
staging staging: rtl8192u: Fix sleep in atomic context bug in dm_fsync_timer_callback 2022-08-21 15:15:57 +02:00
target target: remove an incorrect unmap zeroes data deduction 2022-06-09 10:21:01 +02:00
tc
tee optee: use driver internal tee_context for some rpc 2022-03-02 11:42:47 +01:00
thermal thermal: sysfs: Fix cooling_device_stats_setup() error code path 2022-08-21 15:15:22 +02:00
thunderbolt thunderbolt: Runtime PM activate both ends of the device link 2022-01-27 10:54:14 +01:00
tty tty: n_gsm: fix user open not possible at responder until initiator open 2022-08-21 15:16:06 +02:00
uio
usb usb: cdns3: Don't use priv_dev uninitialized in cdns3_gadget_ep_enable() 2022-08-21 15:16:04 +02:00
vdpa vdpasim: allow to enable a vq repeatedly 2022-06-09 10:21:29 +02:00
vfio amba: Make the remove callback return void 2022-04-08 14:40:02 +02:00
vhost vringh: Fix loop descriptors check in the indirect cases 2022-06-14 18:32:45 +02:00
video fbcon: Fix accelerated fbdev scrolling while logo is still shown 2022-08-21 15:15:22 +02:00
virt
virtio virtio_mmio: Restore guest page size on resume 2022-07-21 21:20:13 +02:00
visorbus
vlynq
vme
w1 w1: w1_therm: fixes w1_seq for ds28ea00 sensors 2022-04-13 21:01:01 +02:00
watchdog watchdog: wdat_wdt: Stop watchdog when rebooting the system 2022-06-14 18:32:43 +02:00
xen xen/gntdev: Ignore failure to unmap INVALID_GRANT_HANDLE 2022-07-29 17:19:07 +02:00
zorro
Kconfig
Makefile