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1e7e2e05c1
linux/drivers
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Jarod Wilson 1e7e2e05c1 drivers/char/random.c: fix priming of last_data 
Commit ec8f02da9e ("random: prime last_data value per fips
requirements") added priming of last_data per fips requirements.

Unfortuantely, it did so in a way that can lead to multiple threads all
incrementing nbytes, but only one actually doing anything with the extra
data, which leads to some fun random corruption and panics.

The fix is to simply do everything needed to prime last_data in a single
shot, so there's no window for multiple cpus to increment nbytes -- in
fact, we won't even increment or decrement nbytes anymore, we'll just
extract the needed EXTRACT_SIZE one time per pool and then carry on with
the normal routine.

All these changes have been tested across multiple hosts and
architectures where panics were previously encoutered.  The code changes
are are strictly limited to areas only touched when when booted in fips
mode.

This change should also go into 3.8-stable, to make the myriads of fips
users on 3.8.x happy.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Tested-by: Jan Stancek <jstancek@redhat.com>
Tested-by: Jan Stodola <jstodola@redhat.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Matt Mackall <mpm@selenic.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-05-24 16:22:52 -07:00
..
accessibility
acpi PCI updates for v3.10: 2013-05-23 13:50:53 -07:00
amba
ata drivers/ata: don't check resource with devm_ioremap_resource 2013-05-12 15:19:46 +02:00
atm
auxdisplay
base Driver core fixes for 3.10-rc2 2013-05-23 09:27:08 -07:00
bcma bcma: add more core IDs 2013-05-17 14:31:05 -04:00
block drivers/block/brd.c: fix brd_lookup_page() race 2013-05-24 16:22:52 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2013-05-01 14:08:52 -07:00
bus
cdrom block_device_operations->release() should return void 2013-05-07 02:16:21 -04:00
char drivers/char/random.c: fix priming of last_data 2013-05-24 16:22:52 -07:00
clk ARM: late Exynos multiplatform changes 2013-05-07 11:28:42 -07:00
clocksource ARM: late Exynos multiplatform changes 2013-05-07 11:28:42 -07:00
connector
cpufreq MIPS: Idle: Consolidate all declarations in <asm/idle.h>. 2013-05-22 01:34:27 +02:00
cpuidle
crypto drivers/crypto/nx: Fixes for multiple races and issues 2013-05-24 18:11:10 +10:00
dca
devfreq
dio
dma drivers/dma: don't check resource with devm_ioremap_resource 2013-05-18 11:54:55 +02:00
edac Two small EDAC fixes. 2013-05-09 10:11:08 -07:00
eisa
extcon Removal of GENERIC_GPIO for v3.10 2013-05-09 09:59:16 -07:00
firewire IEEE 1394 (FireWire) subsystem changes: 2013-05-09 10:11:48 -07:00
firmware Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
gpio GPIO fixes for the v3.10 series: 2013-05-23 18:24:10 -07:00
gpu Merge branch 'drm-radeon-sun-hainan' of git://people.freedesktop.org/~airlied/linux 2013-05-21 08:50:57 -07:00
hid HID: debug: fix RCU preemption issue 2013-05-06 13:07:33 +02:00
hsi
hv Drivers: hv: Fix a bug in get_vp_index() 2013-05-21 09:56:55 -07:00
hwmon hwmon: (tmp401) Drop redundant safety on cache lifetime 2013-05-19 08:19:29 -07:00
hwspinlock A single patch from Vincent extending OMAP's hwspinlock support to OMAP5. 2013-05-07 14:01:27 -07:00
i2c Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-05-21 11:11:45 -07:00
ide block_device_operations->release() should return void 2013-05-07 02:16:21 -04:00
idle Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2013-05-11 15:23:17 -07:00
iio iio: exynos_adc: fix wrong structure extration in suspend and resume 2013-05-22 22:15:20 +01:00
infiniband InfiniBand/RDMA changes for the 3.10 merge window: 2013-05-08 15:29:48 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2013-05-23 13:50:03 -07:00
iommu IOMMU Updates for Linux v3.10 2013-05-06 14:59:13 -07:00
ipack
irqchip ARM: late Exynos multiplatform changes 2013-05-07 11:28:42 -07:00
isdn isdn/kcapi: fix a small underflow 2013-05-20 13:38:14 -07:00
leds drivers/leds/leds-ot200.c: fix error caused by shifted mask 2013-05-24 16:22:51 -07:00
lguest lguest: clear cached last cpu when guest_set_pgd() called. 2013-05-08 10:49:18 +09:30
macintosh Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-05-02 10:16:16 -07:00
mailbox
md dm thin: fix metadata dev resize detection 2013-05-19 18:57:50 +01:00
media Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-05-02 14:38:53 -07:00
memory drivers/memory: don't check resource with devm_ioremap_resource 2013-05-18 11:55:52 +02:00
memstick block_device_operations->release() should return void 2013-05-07 02:16:21 -04:00
message Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block 2013-05-08 10:13:35 -07:00
mfd This is the first batch of MFD fixes for 3.10. 2013-05-22 07:18:41 -07:00
misc char/misc driver fixes for 3.10-rc2 2013-05-23 09:26:32 -07:00
mmc Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2013-05-15 13:37:54 -07:00
mtd drivers/mtd/nand: don't check resource with devm_ioremap_resource 2013-05-18 11:55:55 +02:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-05-24 08:27:32 -07:00
nfc
ntb NTB: Multiple NTB client fix 2013-05-15 10:58:22 -07:00
nubus nubus: Kill nubus_proc_detach_device() 2013-05-04 14:47:26 -04:00
of Device tree bug fixes and documentation updates for v3.10 2013-05-18 10:46:50 -07:00
oprofile
parisc parisc: fix partly 16/64k PAGE_SIZE boot 2013-05-06 23:08:32 +02:00
parport
pci PCI: acpiphp: Re-enumerate devices when host bridge receives Bus Check 2013-05-17 14:12:06 -06:00
pcmcia
pinctrl Pinctrl fixes for the v3.10 series: 2013-05-20 07:59:46 -07:00
platform - Artem's removal of dead code continues (RPX, MBX860) 2013-05-10 09:09:47 -07:00
pnp Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-05-02 10:16:16 -07:00
power For 3.10 we have a few new MFD drivers for: 2013-05-05 17:36:20 -07:00
pps Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-05-01 17:51:54 -07:00
ps3
ptp
pwm drivers/pwm: don't check resource with devm_ioremap_resource 2013-05-18 11:55:58 +02:00
rapidio rapidio/tsi721: fix bug in MSI interrupt handling 2013-05-24 16:22:51 -07:00
regulator Removal of GENERIC_GPIO for v3.10 2013-05-09 09:59:16 -07:00
remoteproc This pull request contains: 2013-05-07 14:04:56 -07:00
reset
rpmsg A small pull request consisting of: 2013-05-07 14:02:00 -07:00
rtc drivers/rtc/rtc-pl031.c: pass correct pointer to free_irq() 2013-05-24 16:22:52 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2013-05-21 09:36:46 -07:00
sbus
scsi Merge branch 'postmerge' into for-linus 2013-05-10 07:54:01 -07:00
sfi
sh
sn
spi Merge branch 'devm_no_resource_check' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-05-18 10:54:54 -07:00
ssb - Lots of cleanups from Artem, including deletion of some obsolete drivers 2013-05-09 10:15:46 -07:00
ssbi
staging Staging driver fixes for 3.10-rc2 2013-05-23 09:27:49 -07:00
target Merge branch 'queue' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2013-05-16 07:55:07 -07:00
tc
thermal drivers/thermal: don't check resource with devm_ioremap_resource 2013-05-18 11:57:30 +02:00
tty tty: mxser: Fix build warning introduced by dfc7b837c7 (Re: linux-next: build warning after merge of the tty.current tree) 2013-05-22 10:26:02 -07:00
uio uio: UIO_DMEM_GENIRQ should depend on HAS_DMA 2013-05-21 10:13:23 -07:00
usb USB fixes for 3.10-rc2 2013-05-23 09:23:32 -07:00
uwb
vfio vfio updates for v3.10 2013-05-02 14:02:32 -07:00
vhost Add missing module license tag to vring helpers. 2013-05-08 10:49:03 +09:30
video fbdev: FB_GOLDFISH should depend on HAS_DMA 2013-05-24 16:22:52 -07:00
virt
virtio
vlynq
vme
w1 drivers/w1/masters: don't check resource with devm_ioremap_resource 2013-05-18 11:58:03 +02:00
watchdog drivers/watchdog: don't check resource with devm_ioremap_resource 2013-05-18 11:58:04 +02:00
xen xen: Fixed assignment error in if statement 2013-05-20 14:14:48 -04:00
zorro proc: Supply PDE attribute setting accessor functions 2013-05-01 17:29:18 -04:00
Kconfig ARM: arm-soc driver changes for 3.10 2013-05-04 12:31:18 -07:00
Makefile ARM: arm-soc driver changes for 3.10 2013-05-04 12:31:18 -07:00