Daniel Borkmann 25e1465ac3 random: add and use memzero_explicit() for clearing data ... commit d4c5efdb97 upstream. zatimend has reported that in his environment (3.16/gcc4.8.3/corei7) memset() calls which clear out sensitive data in extract_{buf,entropy, entropy_user}() in random driver are being optimized away by gcc. Add a helper memzero_explicit() (similarly as explicit_bzero() variants) that can be used in such cases where a variable with sensitive data is being cleared out in the end. Other use cases might also be in crypto code. [ I have put this into lib/string.c though, as it's always built-in and doesn't need any dependencies then. ] Fixes kernel bugzilla: 82041 Reported-by: zatimend@hotmail.co.uk Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2014-11-14 08:47:55 -08:00
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agp
hw_random
ipmi	ipmi: Reset the KCS timeout when starting error recovery	2014-06-07 13:25:30 -07:00
mwave
pcmcia
tpm	tpm: Provide a generic means to override the chip returned timeouts	2014-09-17 09:04:02 -07:00
xilinx_hwicap
apm-emulation.c
applicom.c	applicom: dereferencing NULL on error path	2014-06-30 20:09:41 -07:00
applicom.h
bfin-otp.c
bsr.c
ds1302.c
ds1620.c
dsp56k.c
dtlk.c
efirtc.c
generic_nvram.c
genrtc.c
hangcheck-timer.c
hpet.c
i8k.c
Kconfig
lp.c
Makefile
mbcs.c
mbcs.h
mem.c
misc.c
mmtimer.c
msm_smd_pkt.c
mspec.c
nsc_gpio.c
nvram.c
nwbutton.c
nwbutton.h
nwflash.c
pc8736x_gpio.c
ppdev.c
ps3flash.c
random.c	random: add and use memzero_explicit() for clearing data	2014-11-14 08:47:55 -08:00
raw.c	raw: test against runtime value of max_raw_minors	2014-02-22 12:41:27 -08:00
rtc.c
scx200_gpio.c
snsc_event.c
snsc.c
snsc.h
sonypi.c
tb0219.c
tile-srom.c
tlclk.c
toshiba.c
ttyprintk.c
uv_mmtimer.c
virtio_console.c