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Dmitry Torokhov 6241b53ea9 Input: uinput - reject requests with unreasonable number of slots 
[ Upstream commit 206f533a0a7c683982af473079c4111f4a0f9f5e ]

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

When exercising uinput interface syzkaller may try setting up device
with a really large number of slots, which causes memory allocation
failure in input_mt_init_slots(). While this allocation failure is
handled properly and request is rejected, it results in syzkaller
reports. Additionally, such request may put undue burden on the
system which will try to free a lot of memory for a bogus request.

Fix it by limiting allowed number of slots to 100. This can easily
be extended if we see devices that can track more than 100 contacts.

Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+0122fa359a69694395d5@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=0122fa359a69694395d5
Link: https://lore.kernel.org/r/Zqgi7NYEbpRsJfa2@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-01-19 00:09:59 +01:00
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hall Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
88pm80x_onkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
88pm860x_onkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ab8500-ponkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ad714x-i2c.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ad714x-spi.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ad714x.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ad714x.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
adxl34x-i2c.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
adxl34x-spi.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
adxl34x.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
adxl34x.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
apanel.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
arizona-haptics.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ati_remote2.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
atlas_btns.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
atmel_captouch.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
axp20x-pek.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
bma150.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cm109.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cma3000_d0x.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cma3000_d0x.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cma3000_d0x_i2c.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cobalt_btns.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cpcap-pwrbutton.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
da9052_onkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
da9055_onkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
da9063_onkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
dm355evm_keys.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
drv260x.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
drv2665.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
drv2667.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
e3x0-button.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
gpio-beeper.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
gpio-vibra.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
gpio_decoder.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hisi_powerkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hp_sdc_rtc.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ideapad_slidebar.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ims-pcu.c Input: ims-pcu - fix printf string overflow 2024-11-19 12:27:05 +01:00
iqs269a.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ixp4xx-beeper.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Kconfig Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
keyspan_remote.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kxtj9.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
m68kspkr.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
max8925_onkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
max8997_haptic.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
max77650-onkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
max77693-haptic.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mc13783-pwrbutton.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mma8450.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
palmas-pwrbutton.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pcap_keys.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pcf8574_keypad.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pcf50633-input.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pcspkr.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pm8xxx-vibrator.c Input: pm8xxx-vibrator - correct VIB_MAX_LEVELS calculation 2024-11-19 12:27:05 +01:00
pm8941-pwrkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pmic8xxx-pwrkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
powermate.c Input: powermate - fix use-after-free in powermate_config_complete 2024-11-08 11:25:50 +01:00
pwm-beeper.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pwm-vibra.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rave-sp-pwrbutton.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rb532_button.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
regulator-haptic.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
retu-pwrbutton.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rk805-pwrkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rotary_encoder.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sc27xx-vibra.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sgi_btns.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sirfsoc-onkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
soc_button_array.c Input: soc_button_array - add mapping for airplane mode button 2024-11-18 12:12:01 +01:00
sparcspkr.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
stpmic1_onkey.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
tps65218-pwrbutton.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
twl4030-pwrbutton.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
twl4030-vibra.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
twl6040-vibra.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
uinput.c Input: uinput - reject requests with unreasonable number of slots 2025-01-19 00:09:59 +01:00
wistron_btns.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
wm831x-on.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
xen-kbdfront.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
yealink.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
yealink.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00