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Dmitry Torokhov 6dfa1d80ea Input: try trimming too long modalias strings 
commit 0774d19038 upstream.

If an input device declares too many capability bits then modalias
string for such device may become too long and not fit into uevent
buffer, resulting in failure of sending said uevent. This, in turn,
may prevent userspace from recognizing existence of such devices.

This is typically not a concern for real hardware devices as they have
limited number of keys, but happen with synthetic devices such as
ones created by xen-kbdfront driver, which creates devices as being
capable of delivering all possible keys, since it doesn't know what
keys the backend may produce.

To deal with such devices input core will attempt to trim key data,
in the hope that the rest of modalias string will fit in the given
buffer. When trimming key data it will indicate that it is not
complete by placing "+," sign, resulting in conversions like this:

old: k71,72,73,74,78,7A,7B,7C,7D,8E,9E,A4,AD,E0,E1,E4,F8,174,
new: k71,72,73,74,78,7A,7B,7C,+,

This should allow existing udev rules continue to work with existing
devices, and will also allow writing more complex rules that would
recognize trimmed modalias and check input device characteristics by
other means (for example by parsing KEY= data in uevent or parsing
input device sysfs attributes).

Note that the driver core may try adding more uevent environment
variables once input core is done adding its own, so when forming
modalias we can not use the entire available buffer, so we reduce
it by somewhat an arbitrary amount (96 bytes).

Reported-by: Jason Andryuk <jandryuk@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Tested-by: Jason Andryuk <jandryuk@gmail.com>
Link: https://lore.kernel.org/r/ZjAWMQCJdrxZkvkB@google.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jason Andryuk <jason.andryuk@amd.com>
History 2024-06-21 14:35:45 +02:00
..
accessibility speakup: Fix sizeof() vs ARRAY_SIZE() bug 2024-06-12 11:02:55 +02:00
acpi ACPI: resource: Do IRQ override on TongFang GXxHRXx and GMxHGxx 2024-06-16 13:41:34 +02:00
amba amba: bus: fix refcount leak 2023-09-13 09:42:56 +02:00
android binder: fix max_thread type inconsistency 2024-05-25 16:21:34 +02:00
ata ata: pata_legacy: make legacy_exit() work again 2024-06-16 13:41:33 +02:00
atm atm: idt77252: fix a memleak in open_card_ubr0 2024-02-16 19:06:26 +01:00
auxdisplay auxdisplay: hd44780: move cursor home after clear display command 2023-12-08 08:51:16 +01:00
base driver core: Introduce device_link_wait_removal() 2024-04-10 16:28:32 +02:00
bcma Interrupt subsystem updates: 2022-10-12 10:23:24 -07:00
block null_blk: Fix the WARNING: modpost: missing MODULE_DESCRIPTION() 2024-06-12 11:03:49 +02:00
bluetooth Bluetooth: qca: fix invalid device address check 2024-06-21 14:35:38 +02:00
bus bus: mhi: host: Add MHI_PM_SYS_ERR_FAIL state 2024-04-13 13:05:16 +02:00
cdrom block: remove blk_cleanup_disk 2022-06-28 06:33:15 -06:00
char ppdev: Add an error check in register_device 2024-06-12 11:03:40 +02:00
clk clk: qcom: mmcc-msm8998: fix venus clock issue 2024-06-12 11:03:29 +02:00
clocksource clocksource/drivers/arm_global_timer: Fix maximum prescaler value 2024-04-03 15:19:44 +02:00
comedi comedi: vmk80xx: fix incomplete endpoint checking 2024-04-27 17:07:14 +02:00
connector connector/cn_proc: Use task_is_in_init_pid_ns() 2022-01-26 18:57:09 -08:00
counter counter: microchip-tcb-capture: Fix the use of internal GCLK logic 2023-10-19 23:08:58 +02:00
cpufreq cpufreq: amd-pstate: Fix the inconsistency in max frequency units 2024-06-16 13:41:38 +02:00
cpuidle cpuidle: Avoid potential overflow in integer multiplication 2024-04-13 13:04:54 +02:00
crypto crypto: qat - Fix ADF_DEV_RESET_SYNC memory leak 2024-06-16 13:41:38 +02:00
cxl cxl/pci: Fix disabling memory if DVSEC CXL Range does not match a CFMWS window 2024-03-01 13:26:31 +01:00
dax dax/kmem: Pass valid argument to memory_group_register_static 2023-07-19 16:21:43 +02:00
dca dca: Use PTR_ERR_OR_ZERO() to simplify code 2020-05-15 16:25:20 +02:00
devfreq PM / devfreq: Synchronize devfreq_monitor_[start/stop] 2024-02-05 20:12:47 +00:00
dio drivers: dio: fix possible memory leak in dio_init() 2022-12-31 13:32:38 +01:00
dma dmaengine: idma64: Add check for dma_set_max_seg_size 2024-06-12 11:03:34 +02:00
dma-buf dma-buf/sw-sync: don't enable IRQ from sync_print_obj() 2024-06-12 11:03:55 +02:00
edac EDAC/igen6: Convert PCIBIOS_* return codes to errnos 2024-06-16 13:41:41 +02:00
eisa EISA: use DEVICE_ATTR_RO() helper macro 2021-06-04 15:28:34 +02:00
extcon extcon: max8997: select IRQ_DOMAIN instead of depending on it 2024-06-12 11:03:41 +02:00
firewire firewire: nosy: ensure user_length is taken into account when fetching packet contents 2024-05-17 11:56:16 +02:00
firmware firmware: qcom_scm: disable clocks if qcom_scm_bw_enable() fails 2024-06-21 14:35:40 +02:00
fpga fpga: region: add owner module and take its refcount 2024-06-12 11:03:39 +02:00
fsi fsi: aspeed: Reset master errors after CFAM reset 2023-09-13 09:42:54 +02:00
gnss gnss: replace ida_simple API 2022-06-21 09:30:36 +02:00
gpio gpiolib: cdev: fix uninitialised kfifo 2024-05-17 11:56:15 +02:00
gpu drm/amd/display: Fix incorrect DSC instance for MST 2024-06-21 14:35:39 +02:00
greybus greybus: svc: clean up link configuration hack at hello 2022-02-04 15:27:44 +01:00
hid HID: i2c-hid: elan: fix reset suspend current leakage 2024-06-21 14:35:40 +02:00
hsi HSI: omap_ssi_core: Fix error handling in ssi_init() 2022-12-31 13:32:45 +01:00
hte hte: tegra: Fix missing error code in tegra_hte_test_probe() 2023-11-20 11:51:58 +01:00
hv Drivers: hv: vmbus: Don't free ring buffers that couldn't be re-encrypted 2024-05-17 11:56:08 +02:00
hwmon hwmon: (shtc1) Fix property misspelling 2024-06-12 11:03:59 +02:00
hwspinlock hwspinlock: qcom: add missing regmap config for SFPB MMIO implementation 2023-09-19 12:28:05 +02:00
hwtracing intel_th: pci: Add Meteor Lake-S CPU support 2024-06-16 13:41:38 +02:00
i2c i2c: acpi: Unbind mux adapters before delete 2024-06-21 14:35:41 +02:00
i3c i3c: master: svc: fix invalidate IBI type and miss call client IBI handler 2024-06-16 13:41:41 +02:00
idle intel_idle: add Emerald Rapids Xeon support 2023-10-10 22:00:44 +02:00
iio iio: accel: mxc4005: Reset chip on probe() and resume() 2024-06-21 14:35:38 +02:00
infiniband RDMA/IPoIB: Fix format truncation compilation errors 2024-06-12 11:03:31 +02:00
input Input: try trimming too long modalias strings 2024-06-21 14:35:45 +02:00
interconnect interconnect: qcom: qcm2290: Fix mas_snoc_bimc QoS port assignment 2024-06-12 11:03:35 +02:00
iommu iommu: mtk: fix module autoloading 2024-05-17 11:56:08 +02:00
ipack Char/Misc and other driver changes for 6.1-rc1 2022-10-08 08:56:37 -07:00
irqchip irqchip/loongson-pch-msi: Fix off-by-one on allocation error path 2024-06-12 11:03:10 +02:00
isdn mISDN: Update parameter type of dsp_cmx_send() 2023-08-16 18:27:26 +02:00
leds leds: sgm3140: Add missing timer cleanup and flash gpio control 2024-03-26 18:20:52 -04:00
macintosh macintosh/via-macii: Fix "BUG: sleeping function called from invalid context" 2024-06-12 11:03:14 +02:00
mailbox mailbox: arm_mhuv2: Fix a bug for mhuv2_sender_interrupt 2024-02-05 20:12:58 +00:00
mcb mcb: fix error handling for different scenarios when parsing 2023-11-28 17:07:13 +00:00
md md/raid5: fix deadlock that raid5d() wait for itself to clear MD_SB_CHANGE_PENDING 2024-06-16 13:41:34 +02:00
media media: v4l2-core: hold videodev_lock until dev reg, finishes 2024-06-16 13:41:35 +02:00
memory memory: brcmstb_dpfe: fix testing array offset after use 2023-07-19 16:21:24 +02:00
memstick memstick r592: make memstick_debug_get_tpc_name() static 2023-07-19 16:21:08 +02:00
message scsi: message: mptlan: Fix use after free bug in mptlan_remove() due to race condition 2023-05-24 17:32:37 +01:00
mfd mfd: stpmic1: Fix swapped mask/unmask in irq chip 2024-05-25 16:21:30 +02:00
misc mei: me: release irq in mei_me_pci_resume error path 2024-06-21 14:35:43 +02:00
mmc mmc: davinci: Don't strip remove function when driver is builtin 2024-06-21 14:35:40 +02:00
most most: usb: replace snprintf in show functions with sysfs_emit 2021-11-26 17:03:47 +01:00
mtd mtd: rawnand: hynix: fixed typo 2024-06-12 11:03:22 +02:00
mux mux: Fix struct mux_state kernel-doc comment 2022-02-04 15:47:12 +01:00
net gve: Clear napi->skb before dev_kfree_skb_any() 2024-06-21 14:35:45 +02:00
nfc NFC: trf7970a: disable all regulators on removal 2024-05-02 16:29:24 +02:00
ntb NTB: fix possible name leak in ntb_register_device() 2024-03-26 18:20:49 -04:00
nubus nubus: Partially revert proc_create_single_data() conversion 2023-07-05 18:27:37 +01:00
nvdimm nd_btt: Make BTT lanes preemptible 2023-11-20 11:52:05 +01:00
nvme nvmet: fix ns enable/disable possible hang 2024-06-12 11:03:54 +02:00
nvmem nvmem: meson-efuse: fix function pointer type mismatch 2024-04-03 15:19:32 +02:00
of of: dynamic: Synchronize of_changeset_destroy() with the devlink removals 2024-04-10 16:28:32 +02:00
opp OPP: debugfs: Fix warning around icc_get_name() 2024-03-26 18:20:42 -04:00
parisc parisc/power: Fix power soft-off button emulation on qemu 2024-01-31 16:16:59 -08:00
parport parport: parport_serial: Add Brainboxes device IDs and geometry 2024-01-20 11:50:11 +01:00
pci PCI/EDR: Align EDR_PORT_LOCATE_DSM with PCI Firmware r3.3 2024-06-12 11:03:41 +02:00
pcmcia pcmcia: ds: fix possible name leak in error path in pcmcia_device_add() 2023-11-20 11:52:13 +01:00
peci peci: cpu: Fix use-after-free in adev_release() 2022-08-15 20:31:35 +02:00
perf perf/arm-dmc620: Fix lockdep assert in ->event_init() 2024-06-12 11:03:49 +02:00
phy phy: ti: tusb1210: Resolve charger-det crash if charger psy is unregistered 2024-05-02 16:29:31 +02:00
pinctrl pinctrl: core: handle radix_tree_insert() errors in pinctrl_register_one_pin() 2024-05-25 16:21:30 +02:00
platform platform/x86: intel-vbtn: Update tablet mode switch at end of probe 2024-04-13 13:05:26 +02:00
pnp PNP: ACPI: fix fortify warning 2024-02-05 20:12:47 +00:00
power power: supply: mt6360_charger: Fix of_match for usb-otg-vbus regulator 2024-05-17 11:55:55 +02:00
powercap powercap: dtpm_cpu: Fix error check against freq_qos_add_request() 2024-03-26 18:20:36 -04:00
pps pps: generators: pps_gen_parport: Switch to use module_parport_driver() 2022-03-18 14:01:19 +01:00
ps3 powerpc/ps3: Warn on PS3 device errors 2021-06-10 21:44:58 +10:00
ptp ptp: Fix error message on failed pin verification 2024-06-21 14:35:35 +02:00
pwm pwm: sti: Simplify probe function using devm functions 2024-06-12 11:03:14 +02:00
rapidio rapidio: devices: fix missing put_device in mport_cdev_open 2022-12-31 13:32:00 +01:00
ras RAS/CEC: Reduce offline page threshold for Intel systems 2022-08-22 19:30:02 +02:00
regulator regulator: bd71828: Don't overwrite runtime voltages 2024-06-12 11:03:49 +02:00
remoteproc remoteproc: mediatek: Make sure IPI buffer fits in L2TCM 2024-05-25 16:21:35 +02:00
reset reset: hisilicon: hi6220: fix Wvoid-pointer-to-enum-cast warning 2024-01-20 11:50:07 +01:00
rpmsg rpmsg: virtio: Free driver_override when rpmsg_remove() 2024-01-31 16:16:59 -08:00
rtc rtc: mt6397: select IRQ_DOMAIN instead of depending on it 2024-03-26 18:20:58 -04:00
s390 s390/ap: Fix crash in AP internal function modify_bitmap() 2024-06-16 13:41:41 +02:00
sbus module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
scsi scsi: sd: Use READ(16) when reading block zero on large capacity disks 2024-06-21 14:35:45 +02:00
sh genirq: Add and use an irq_data_update_affinity helper 2022-07-07 09:38:04 +01:00
siox siox: fix possible memory leak in siox_device_add() 2022-11-09 15:40:14 +01:00
slimbus slimbus: qcom-ngd-ctrl: Add timeout for wait operation 2024-05-17 11:56:20 +02:00
soc soc: qcom: rpmh-rsc: Enhance check for VRM in-flight request 2024-06-16 13:41:33 +02:00
soundwire soundwire: cadence: fix invalid PDI offset 2024-06-12 11:03:34 +02:00
spi spi: stm32: Don't warn about spurious interrupts 2024-06-12 11:03:58 +02:00
spmi spmi: mediatek: Fix UAF on device remove 2024-02-05 20:12:58 +00:00
ssb ssb: gpio: Use generic_handle_irq_safe() 2022-09-19 15:08:38 +02:00
staging greybus: arche-ctrl: move device table to its right location 2024-06-12 11:03:35 +02:00
target scsi: target: Fix SELinux error when systemd-modules loads the target module 2024-05-17 11:56:07 +02:00
tc The main MIPS changes for 5.6: 2020-01-31 11:28:31 -08:00
tee tee: optee: Fix kernel panic caused by incorrect error handling 2024-04-03 15:19:42 +02:00
thermal thermal/drivers/qcom/lmh: Check for SCM availability at probe 2024-06-16 13:41:33 +02:00
thunderbolt thunderbolt: debugfs: Fix margin debugfs node creation condition 2024-06-21 14:35:44 +02:00
tty tty: n_tty: Fix buffer offsets when lookahead is used 2024-06-21 14:35:43 +02:00
ufs scsi: ufs: ufs-qcom: Clear qunipro_g4_sel for HW major version > 5 2024-06-12 11:03:33 +02:00
uio uio_hv_generic: Don't free decrypted memory 2024-05-17 11:56:08 +02:00
usb xhci: Apply broken streams quirk to Etron EJ188 xHCI host 2024-06-21 14:35:44 +02:00
vdpa vdpa/mlx5: Allow CVQ size changes 2024-03-26 18:21:00 -04:00
vfio VFIO: Add the SPR_DSA and SPR_IAX devices to the denylist 2024-05-17 11:56:23 +02:00
vhost vhost: Add smp_rmb() in vhost_enable_notify() 2024-04-17 11:18:27 +02:00
video fbdev: savage: Handle err return when savagefb_check_var failed 2024-06-16 13:41:36 +02:00
virt drivers/virt/acrn: fix PFNMAP PTE checks in acrn_vm_ram_map() 2024-06-12 11:03:30 +02:00
virtio virtio: delete vq in vp_find_vqs_msix() when request_irq() fails 2024-06-12 11:03:52 +02:00
vlynq bus: Make remove callback return void 2021-07-21 11:53:42 +02:00
w1 w1: fix loop in w1_fini() 2023-07-19 16:21:48 +02:00
watchdog watchdog: rti_wdt: Set min_hw_heartbeat_ms to accommodate a safety margin 2024-06-16 13:41:39 +02:00
xen drivers/xen: Improve the late XenStore init protocol 2024-06-12 11:03:53 +02:00
zorro proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
Kconfig vme: move back to staging 2022-06-10 15:38:14 +02:00
Makefile hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace device 2022-09-08 16:26:17 -06:00