Jason A. Donenfeld b169c13de4 random: invalidate batched entropy after crng init ... It's possible that get_random_{u32,u64} is used before the crng has initialized, in which case, its output might not be cryptographically secure. For this problem, directly, this patch set is introducing the *_wait variety of functions, but even with that, there's a subtle issue: what happens to our batched entropy that was generated before initialization. Prior to this commit, it'd stick around, supplying bad numbers. After this commit, we force the entropy to be re-extracted after each phase of the crng has initialized. In order to avoid a race condition with the position counter, we introduce a simple rwlock for this invalidation. Since it's only during this awkward transition period, after things are all set up, we stop using it, so that it doesn't have an impact on performance. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org # v4.11+		2017-06-07 19:45:37 -04:00
..
agp	agp: use set_memory.h header	2017-05-08 17:15:13 -07:00
hw_random	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2017-05-02 15:53:46 -07:00
ipmi	Annotation of module parameters that specify device settings	2017-05-10 19:13:03 -07:00
mwave	Annotate hardware config module parameters in drivers/char/mwave/	2017-04-20 12:02:32 +01:00
pcmcia	lib/vsprintf.c: remove %Z support	2017-02-27 18:43:47 -08:00
tpm	char/misc patches for 4.12-rc1	2017-05-04 19:15:35 -07:00
xilinx_hwicap	char: xilinx_hwicap: Remove pointless local variables	2017-01-25 11:41:44 +01:00
xillybus	char: xillybus: Fix spelling mistake and comment	2016-08-31 14:47:54 +02:00
apm-emulation.c	apm-emulation: move APM_MINOR_DEV to include/linux/miscdevice.h	2017-01-10 21:46:41 +01:00
applicom.c	Annotate hardware config module parameters in drivers/char/	2017-04-20 12:02:32 +01:00
applicom.h
bfin-otp.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
bsr.c	bsr: avoid format string leaking into device name	2014-07-09 16:59:15 -07:00
ds1302.c	ds1302: remove unneeded linux/miscdevice.h include	2017-01-10 21:46:41 +01:00
ds1620.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
dsp56k.c	format-security: move static strings to const	2017-05-08 17:15:14 -07:00
dtlk.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
efirtc.c	drivers/char: make efirtc.c driver explicitly non-modular	2015-09-20 19:32:35 -07:00
generic_nvram.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
hangcheck-timer.c	hangcheck-timer: Fix typo in comment	2017-04-08 18:08:54 +02:00
hpet.c	hpet: Make cmd parameter of hpet_ioctl_common() unsigned	2017-03-17 15:10:49 +09:00
Kconfig	TTY/Serial driver patches for 4.11-rc1	2017-02-22 12:17:25 -08:00
lp.c	char: lp: fix possible integer overflow in lp_setup()	2017-05-16 23:05:20 +02:00
Makefile	RTC for 4.8	2016-08-05 09:48:22 -04:00
mbcs.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
mbcs.h
mem.c	drivers: char: mem: Check for address space wraparound with mmap()	2017-05-18 16:53:55 +02:00
misc.c	drivers: char: misc: Replace printk with pr_err.	2017-04-08 17:53:06 +02:00
mmtimer.c	time: Change k_clock timer_set() and timer_get() to use timespec64	2017-04-14 21:49:56 +02:00
mspec.c	drivers, char: convert vma_data.refcnt from atomic_t to refcount_t	2017-03-23 13:57:19 +01:00
nsc_gpio.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
nvram.c	char/nvram: set array of const as const	2016-02-08 14:57:30 -08:00
nwbutton.c	drivers/char/nwbutton: Fix build breakage caused by include file reshuffling	2017-03-07 08:35:49 +01:00
nwbutton.h
nwflash.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
pc8736x_gpio.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
powernv-op-panel.c	powerpc/powernv: Add driver for operator panel on FSP machines	2016-06-29 17:33:46 +10:00
ppdev.c	ppdev: fix registering same device name	2017-03-16 17:32:21 +09:00
ps3flash.c	wrappers for ->i_mutex access	2016-01-22 18:04:28 -05:00
random.c	random: invalidate batched entropy after crng init	2017-06-07 19:45:37 -04:00
raw.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
rtc.c	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
scx200_gpio.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
snsc_event.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>	2017-03-02 08:42:29 +01:00
snsc.c	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
snsc.h
sonypi.c	scripts/spelling.txt: add "initialiazation" pattern and fix typo instances	2017-02-27 18:43:47 -08:00
tb0219.c	mips: separate extable.h, switch module.h to it	2016-10-05 18:36:18 -04:00
tile-srom.c	tile-srom: allow the driver to be built as a module	2016-11-10 15:18:56 +01:00
tlclk.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
toshiba.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
ttyprintk.c	ttyprintk: Neaten and simplify printing	2016-09-13 17:30:17 +02:00
uv_mmtimer.c
virtio_console.c	virtio: fixes, cleanups, performance	2017-05-10 11:33:08 -07:00