linux-stable/drivers/char
Jason A. Donenfeld 1754abb3e7 random: mix build-time latent entropy into pool at init
Prior, the "input_pool_data" array needed no real initialization, and so
it was easy to mark it with __latent_entropy to populate it during
compile-time. In switching to using a hash function, this required us to
specifically initialize it to some specific state, which means we
dropped the __latent_entropy attribute. An unfortunate side effect was
this meant the pool was no longer seeded using compile-time random data.
In order to bring this back, we declare an array in rand_initialize()
with __latent_entropy and call mix_pool_bytes() on that at init, which
accomplishes the same thing as before. We make this __initconst, so that
it doesn't take up space at runtime after init.

Fixes: 6e8ec2552c ("random: use computational hash for entropy extraction")
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2022-03-31 16:43:27 -04:00
..
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 random: treat bootloader trust toggle the same way as cpu trust toggle 2022-03-25 08:49:40 -06:00
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
nwflash.c
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
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: mix build-time latent entropy into pool at init 2022-03-31 16:43:27 -04:00
scx200_gpio.c
sonypi.c
tb0219.c
tlclk.c
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