linux-stable/drivers/char
Jason A. Donenfeld af704c856e random: skip fast_init if hwrng provides large chunk of entropy
At boot time, EFI calls add_bootloader_randomness(), which in turn calls
add_hwgenerator_randomness(). Currently add_hwgenerator_randomness()
feeds the first 64 bytes of randomness to the "fast init"
non-crypto-grade phase. But if add_hwgenerator_randomness() gets called
with more than POOL_MIN_BITS of entropy, there's no point in passing it
off to the "fast init" stage, since that's enough entropy to bootstrap
the real RNG. The "fast init" stage is just there to provide _something_
in the case where we don't have enough entropy to properly bootstrap the
RNG. But if we do have enough entropy to bootstrap the RNG, the current
logic doesn't serve a purpose. So, in the case where we're passed
greater than or equal to POOL_MIN_BITS of entropy, this commit makes us
skip the "fast init" phase.

Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2022-03-25 08:49:40 -06:00
..
agp drm-misc-next for v5.18: 2022-02-01 19:02:41 +10:00
hw_random ARM driver updates for 5.18 2022-03-23 18:23:13 -07:00
ipmi ipmi: Fix UAF when uninstall ipmi_si and ipmi_msghandler module 2021-12-21 08:04:42 -06:00
mwave char/mwave: Adjust io port register size 2021-12-03 14:27:06 +01:00
pcmcia cm4000_cs: Use struct_group() to zero struct cm4000_dev region 2021-09-25 08:20:49 -07:00
tpm bounds-fixes updates for v5.18-rc1 2022-03-21 19:58:27 -07:00
xilinx_hwicap
xillybus char: xillybus: fix msg_ep UAF in xillyusb_probe() 2021-10-19 09:40:18 +02:00
adi.c
apm-emulation.c
applicom.c applicom: unneed to initialise statics to 0 2021-12-21 10:14:08 +01:00
applicom.h
bsr.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
ds1620.c
dsp56k.c
dtlk.c
hangcheck-timer.c
hpet.c hpet: simplify subdirectory registration with register_sysctl() 2022-01-22 08:33:34 +02:00
Kconfig char: move RANDOM_TRUST_CPU & RANDOM_TRUST_BOOTLOADER into the Character devices menu 2021-08-16 19:02:19 +02:00
lp.c char: lp: remove redundant space around (inside) parenthesized expressions 2021-03-24 08:26:32 +01:00
Makefile remove the raw driver 2021-06-04 15:35:03 +02:00
mem.c Revert "random: block in /dev/urandom" 2022-03-22 09:17:20 -07:00
misc.c char: misc: increase DYNAMIC_MINORS value 2020-11-03 09:52:04 +01:00
mspec.c char: mspec: Use kvzalloc() in mspec_mmap() 2020-08-28 12:10:04 +02:00
nsc_gpio.c
nvram.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nwbutton.c
nwbutton.h misc: cleanup minor number definitions in c file into miscdevice.h 2020-03-18 12:27:03 +01:00
nwflash.c misc: move FLASH_MINOR into miscdevice.h and fix conflicts 2020-03-18 12:27:04 +01:00
pc8736x_gpio.c
powernv-op-panel.c powerpc/powernv: Fix fall-through warning for Clang 2021-07-13 19:21:41 -05:00
ppdev.c ppdev: Distribute switch variables for initialization 2020-02-23 20:28:12 +01:00
ps3flash.c powerpc/ps3: make system bus's remove and shutdown callbacks return void 2020-12-04 01:01:22 +11:00
random.c random: skip fast_init if hwrng provides large chunk of entropy 2022-03-25 08:49:40 -06:00
scx200_gpio.c
sonypi.c
tb0219.c
tlclk.c drivers: char: tlclk.c: Avoid data race between init and interrupt handler 2020-04-23 16:55:24 +02:00
toshiba.c module: remove never implemented MODULE_SUPPORTED_DEVICE 2021-03-17 13:16:18 -07:00
ttyprintk.c tty: drop put_tty_driver 2021-07-27 12:17:21 +02:00
uv_mmtimer.c
virtio_console.c virtio_console: break out of buf poll on remove 2022-03-04 08:33:22 -05:00