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Jason A. Donenfeld ae099e8e98 random: add mechanism for VM forks to reinitialize crng 
When a VM forks, we must immediately mix in additional information to
the stream of random output so that two forks or a rollback don't
produce the same stream of random numbers, which could have catastrophic
cryptographic consequences. This commit adds a simple API, add_vmfork_
randomness(), for that, by force reseeding the crng.

This has the added benefit of also draining the entropy pool and setting
its timer back, so that any old entropy that was there prior -- which
could have already been used by a different fork, or generally gone
stale -- does not contribute to the accounting of the next 256 bits.

Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Jann Horn <jannh@google.com>
Cc: Eric Biggers <ebiggers@google.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
 		2022-03-12 18:00:56 -07:00
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accessibility speakup-dectlk: Restore pitch setting 2022-02-08 12:15:04 +01:00
acpi Merge branch 'acpi-processor' 2022-02-18 19:36:36 +01:00
amba
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android Merge 5.16-rc8 into char-misc-next 2022-01-03 13:44:38 +01:00
ata ata: libata-core: Disable TRIM on M88V29 2022-02-08 17:06:14 +09:00
atm atm: iphase: remove redundant pointer skb 2022-01-13 12:50:48 +00:00
auxdisplay
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base PM: s2idle: ACPI: Fix wakeup interrupts handling 2022-02-07 21:02:31 +01:00
bcma
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block block: fix surprise removal for drivers calling blk_set_queue_dying 2022-02-17 07:54:03 -07:00
bluetooth virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes 2022-01-18 10:05:48 +02:00
bus bus: mhi: pci_generic: Add mru_default for Cinterion MV31-W 2022-02-06 13:19:46 +01:00
cdrom cdrom: simplify subdirectory registration with register_sysctl() 2022-01-22 08:33:35 +02:00
char random: add mechanism for VM forks to reinitialize crng 2022-03-12 18:00:56 -07:00
clk Some hot fixes for clk driver patches merged last week 2022-01-21 09:16:11 +02:00
clocksource Fixes for omaps 2022-02-07 17:42:44 +01:00
comedi
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connector connector/cn_proc: Use task_is_in_init_pid_ns() 2022-01-26 18:57:09 -08:00
counter counter: fix an IS_ERR() vs NULL bug 2022-01-26 19:40:33 +01:00
cpufreq cpufreq: amd-pstate: Fix Kconfig dependencies for AMD P-State 2022-01-06 18:31:33 +01:00
cpuidle cpuidle: use default_groups in kobj_type 2022-01-05 18:31:17 +01:00
crypto crypto: octeontx2 - Avoid stack variable overflow 2022-01-31 11:22:53 +11:00
cxl cxl/core: Remove cxld_const_init in cxl_decoder_alloc() 2022-01-04 17:29:31 -08:00
dax Merge branch 'akpm' (patches from Andrew) 2022-01-15 20:37:06 +02:00
dca
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devfreq
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dio
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dma dmaengine: shdma: Fix runtime PM imbalance on error 2022-02-15 11:04:16 +05:30
dma-buf dma-buf: heaps: Fix potential spectre v1 gadget 2022-02-01 13:18:09 +05:30
edac EDAC: Fix calculation of returned address and next offset in edac_align_ptr() 2022-02-15 15:54:46 +01:00
eisa
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extcon extcon: Deduplicate code in extcon_set_state_sync() 2021-12-24 15:27:52 +09:00
firewire
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firmware efi: runtime: avoid EFIv2 runtime services on Apple x86 machines 2022-01-23 10:31:27 +01:00
fpga
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fsi
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gnss gnss: usb: add support for Sierra Wireless XM1210 2021-12-22 15:38:12 +01:00
gpio gpio: sim: fix hogs with custom chip labels 2022-02-09 11:41:29 +01:00
gpu Merge tag 'drm-intel-fixes-2022-02-17' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes 2022-02-18 05:44:45 +10:00
greybus greybus: es2: fix typo in a comment 2021-12-21 10:13:26 +01:00
hid HID: amd_sfh: Add interrupt handler to process interrupts 2022-02-14 16:28:51 +01:00
hsi
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hv Drivers: hv: utils: Make use of the helper macro LIST_HEAD() 2022-02-09 14:33:21 +00:00
hwmon hwmon: (nct6775) Fix crash in clear_caseopen 2022-01-24 14:32:47 -08:00
hwspinlock
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hwtracing
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i2c i2c: brcmstb: fix support for DSL and CM variants 2022-02-18 10:37:33 +01:00
i3c i3c: master: dw: check return of dw_i3c_master_get_free_pos() 2022-01-13 02:05:50 +01:00
idle
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iio iio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL 2022-02-11 12:13:22 +01:00
infiniband RDMA/mlx4: Don't continue event handler after memory allocation failure 2022-02-01 10:12:26 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2022-02-20 11:15:46 -08:00
interconnect
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iommu iommu/amd: Fix loop timeout issue in iommu_ga_log_enable() 2022-02-04 12:57:26 +01:00
ipack
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irqchip irqchip/sifive-plic: Add missing thead,c900-plic match string 2022-02-02 10:49:29 +00:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-30 12:12:12 -08:00
leds LED updates for 5.17. Nothing major is happening here. 2022-01-12 16:59:22 -08:00
macintosh macintosh/mac_hid.c: simplify subdirectory registration with register_sysctl() 2022-01-22 08:33:35 +02:00
mailbox - qcom: misc updates to qcom-ipcc driver 2022-01-13 11:19:07 -08:00
mcb
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md block: fix surprise removal for drivers calling blk_set_queue_dying 2022-02-17 07:54:03 -07:00
media bitmap patches for 5.17-rc1 2022-01-23 06:20:44 +02:00
memory MTD core changes: 2022-01-11 11:35:28 -08:00
memstick
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message scsi: message: fusion: mptctl: Use dma_alloc_coherent() 2022-01-10 10:33:52 -05:00
mfd driver core changes for 5.17-rc1 2022-01-12 11:11:34 -08:00
misc eeprom: ee1004: limit i2c reads to I2C_SMBUS_BLOCK_MAX 2022-02-04 16:27:44 +01:00
mmc mmc: block: fix read single on recovery logic 2022-02-08 16:04:49 +01:00
most
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mtd mtd: rawnand: brcmnand: Fixed incorrect sub-page ECC status 2022-01-31 17:08:56 +01:00
mux
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net Networking fixes for 5.17-rc5, including fixes from wireless and 2022-02-17 11:33:59 -08:00
nfc nfc: st21nfca: Fix potential buffer overflows in EVT_TRANSACTION 2022-01-12 14:17:45 +00:00
ntb New AMD PCI ID for NTB, and a number of bug fixes for ntb_hw_switchtec 2022-01-17 08:14:18 +02:00
nubus proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
nvdimm virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes 2022-01-18 10:05:48 +02:00
nvme block: fix surprise removal for drivers calling blk_set_queue_dying 2022-02-17 07:54:03 -07:00
nvmem nvmem: mtk-efuse: support minimum one byte access stride and granularity 2021-12-21 10:26:50 +01:00
of Devicetree fixes for v5.17, take 1: 2022-01-22 09:52:17 +02:00
opp
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parisc parisc: Fix sglist access in ccio-dma.c 2022-01-28 10:15:34 +01:00
parport
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pci hyperv-fixes for 5.17-rc5 2022-02-15 09:05:01 -08:00
pcmcia pci-v5.17-changes 2022-01-16 08:08:11 +02:00
perf Rework of the MSI interrupt infrastructure: 2022-01-13 09:05:29 -08:00
phy phy: dphy: Correct clk_pre parameter 2022-02-02 10:33:04 +05:30
pinctrl pinctrl: microchip-sgpio: Fix support for regmap 2022-01-31 12:07:31 +01:00
platform platform/x86: thinkpad_acpi: Fix incorrect use of platform profile on AMD platforms 2022-02-01 15:37:00 +01:00
pnp proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
power power: supply: bq256xx: Handle OOM correctly 2022-02-11 21:19:51 +01:00
powercap Merge back earlier power capping changes for v5.17 2021-12-27 16:51:12 +01:00
pps
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ps3
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ptp net: fix SOF_TIMESTAMPING_BIND_PHC to work with multiple sockets 2022-01-06 12:18:08 +00:00
pwm pwm: Changes for v5.17-rc1 2022-01-20 13:25:01 +02:00
rapidio rapidio: remove not used code about RIO_VID_TUNDRA 2021-12-21 10:22:19 +01:00
ras
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regulator regulator: core: fix false positive in regulator_late_cleanup() 2022-02-08 13:37:48 +00:00
remoteproc remoteproc: qcom: q6v5: fix service routines build errors 2022-01-17 16:44:26 -06:00
reset SoC: Add support for StarFive JH7100 RISC-V SoC 2022-01-10 08:32:37 -08:00
rpmsg rpmsg fixes for v5.17-rc1 2022-01-27 11:23:26 +02:00
rtc rtc: sunplus: fix return value in sp_rtc_probe() 2022-01-16 23:50:34 +01:00
s390 s390/cio: verify the driver availability for path_event call 2022-02-09 22:55:01 +01:00
sbus
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scsi scsi: ufs: core: Fix divide by zero in ufshcd_map_queues() 2022-02-14 22:10:29 -05:00
sh
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siox
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slimbus
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soc sound fixes for 5.17-rc5 2022-02-18 09:20:52 -08:00
soundwire Char/Misc and other driver changes for 5.17-rc1 2022-01-14 16:02:28 +01:00
spi spi: Fixes for v5.17 2022-02-01 12:39:37 -08:00
spmi
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ssb
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staging staging: fbtft: Fix error path in fbtft_driver_module_init() 2022-01-25 16:36:49 +01:00
target scsi: target: iscsi: Make sure the np under each tpg is unique 2022-01-24 23:30:24 -05:00
tc
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tee OP-TE fixes for v5.17 2022-02-08 09:48:44 +01:00
thermal thermal: int340x: Add Raptor Lake PCI device id 2022-01-17 19:48:07 +01:00
thunderbolt thunderbolt: Add module parameter for CLx disabling 2021-12-28 10:43:56 +03:00
tty tty: n_tty: do not look ahead for EOL character past the end of the buffer 2022-02-16 10:13:23 -08:00
uio UIO: use default_groups in kobj_type 2021-12-29 10:54:50 +01:00
usb Revert "usb: dwc2: drd: fix soft connect when gadget is unconfigured" 2022-02-12 10:08:54 +01:00
vdpa virtio,vdpa,qemu_fw_cfg: features, cleanups, fixes 2022-01-18 10:05:48 +02:00
vfio VFIO updates for v5.17-rc1 2022-01-20 13:31:46 +02:00
vhost vdpa: Protect vdpa reset with cf_mutex 2022-01-14 18:50:54 -05:00
video * drm/panel: simple: Fix assignments from panel_dpi_probe() 2022-02-11 12:06:15 +10:00
virt bitmap patches for 5.17-rc1 2022-01-23 06:20:44 +02:00
virtio vdpa: Allow to configure max data virtqueues 2022-01-14 18:50:53 -05:00
visorbus
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vlynq
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vme
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w1 w1: w1_therm: use swap() to make code cleaner 2021-12-21 10:38:13 +01:00
watchdog linux-watchdog 5.17-rc1 tag 2022-01-17 08:07:57 +02:00
xen xen/pci: Make use of the helper macro LIST_HEAD() 2022-02-10 11:10:23 +01:00
zorro proc: remove PDE_DATA() completely 2022-01-22 08:33:37 +02:00
Kconfig
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Makefile
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