Borislav Petkov (AMD) 3f9b7101be x86/srso: Add a Speculative RAS Overflow mitigation ... Upstream commit: fb3bd914b3ec28f5fb697ac55c4846ac2d542855 Add a mitigation for the speculative return address stack overflow vulnerability found on AMD processors. The mitigation works by ensuring all RET instructions speculate to a controlled location, similar to how speculation is controlled in the retpoline sequence. To accomplish this, the __x86_return_thunk forces the CPU to mispredict every function return using a 'safe return' sequence. To ensure the safety of this mitigation, the kernel must ensure that the safe return sequence is itself free from attacker interference. In Zen3 and Zen4, this is accomplished by creating a BTB alias between the untraining function srso_untrain_ret_alias() and the safe return function srso_safe_ret_alias() which results in evicting a potentially poisoned BTB entry and using that safe one for all function returns. In older Zen1 and Zen2, this is accomplished using a reinterpretation technique similar to Retbleed one: srso_untrain_ret() and srso_safe_ret(). Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-08-08 19:57:40 +02:00
..
ABI	x86/speculation: Add Gather Data Sampling mitigation	2023-08-08 19:57:38 +02:00
accounting	psi: Fix uaf issue when psi trigger is destroyed while being polled	2022-02-05 12:37:55 +01:00
admin-guide	x86/srso: Add a Speculative RAS Overflow mitigation	2023-08-08 19:57:40 +02:00
arm	ARM: 9012/1: move device tree mapping out of linear region	2021-05-19 10:13:18 +02:00
arm64	arm64: errata: Remove AES hwcap for COMPAT tasks	2022-10-30 09:41:16 +01:00
block	block-5.10-2020-10-24	2020-10-24 12:46:42 -07:00
bpf	bpf: Migrate from patchwork.ozlabs.org to patchwork.kernel.org.	2020-10-11 22:05:47 +02:00
cdrom
core-api	kernel.h: split out kstrtox() and simple_strtox() to a separate header	2023-06-21 15:45:35 +02:00
cpu-freq
crypto	crypto: af_alg - add extra parameters for DRBG interface	2020-09-25 17:48:52 +10:00
dev-tools	docs/scripts/gdb: add necessary make scripts_gdb step	2023-03-11 16:39:52 +01:00
devicetree	ASoC: dt-bindings: Adjust #sound-dai-cells on TI's single-DAI codecs	2023-06-09 10:30:09 +02:00
doc-guide	docs: kerneldoc.py: add support for kerneldoc -nosymbol	2020-10-15 07:49:38 +02:00
driver-api	spi: Update reference to struct spi_controller	2023-01-14 10:15:26 +01:00
fault-injection	debugfs: fix error when writing negative value to atomic_t debugfs file	2023-01-14 10:15:19 +01:00
fb	drm fixes (round two) for 5.10-rc1	2020-10-23 13:56:34 -07:00
features	s390 updates for the 5.10 merge window	2020-10-16 12:36:38 -07:00
filesystems	fs: Lock moved directories	2023-07-27 08:44:13 +02:00
firmware_class
firmware-guide	Documentation: ACPI: EINJ: Fix obsolete example	2022-08-25 11:37:53 +02:00
fpga
gpu	Revert "fbcon: Disable accelerated scrolling"	2022-02-08 18:30:40 +01:00
hid
hwmon	hwmon: (lm90) Add basic support for TI TMP461	2021-12-29 12:25:59 +01:00
i2c	Documentation: i2c: add testunit docs to index	2020-10-05 22:57:45 +02:00
ia64
ide
iio
infiniband
input	Input: iforce - add support for Boeder Force Feedback Wheel	2022-09-20 12:38:32 +02:00
isdn
kbuild	Documentation/Kbuild: Remove references to gcc-plugin.sh	2021-12-14 11:32:46 +01:00
kernel-hacking	docs: futex: Fix kernel-doc references after code split-up preparation	2023-04-26 11:27:40 +02:00
leds	docs: leds: index.rst: add a missing file	2020-11-02 13:45:37 +01:00
litmus-tests
livepatch
locking	Documentation/locking/locktypes: Update migrate_disable() bits.	2021-12-14 11:32:42 +01:00
m68k
maintainer
mhi
mips	dt: Remove booting-without-of.rst	2020-10-13 13:33:16 -05:00
misc-devices	Documentation: remove mic/index from misc-devices/index.rst	2020-11-04 11:38:32 +01:00
netlabel
networking	net: Introduce net.ipv4.tcp_migrate_req.	2023-07-27 08:44:42 +02:00
nios2
nvdimm
openrisc
parisc
PCI	Documentation: better locations for sysfs-pci, sysfs-tagging	2020-10-09 09:33:23 -06:00
pcmcia
power	PCI/PM: Rename pci_dev.d3_delay to d3hot_delay	2020-09-29 14:21:50 -05:00
powerpc	powerpc/doc: Fix htmldocs errors	2023-04-26 11:27:37 +02:00
process	docs: update mediator contact information in CoC doc	2022-11-25 17:45:53 +01:00
RCU	Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu	2020-10-09 08:21:56 +02:00
riscv
s390
scheduler
scsi	scsi: libsas: Introduce a _gfp() variant of event notifiers	2021-03-25 09:04:11 +01:00
security	watch_queue: Drop references to /dev/watch_queue	2021-03-04 11:37:59 +01:00
sh	dt: Remove booting-without-of.rst	2020-10-13 13:33:16 -05:00
sound	ALSA: hda/sigmatel: add pin overrides for Intel DP45SG motherboard	2023-04-20 12:10:24 +02:00
sparc
sphinx	docs: Fix the docs build with Sphinx 6.0	2023-01-18 11:44:53 +01:00
sphinx-static
spi
staging
target	tweewide: Fix most Shebang lines	2021-05-22 11:40:55 +02:00
timers
trace	attr: use consistent sgid stripping checks	2023-03-22 13:30:08 +01:00
translations	docs: futex: Fix kernel-doc references after code split-up preparation	2023-04-26 11:27:40 +02:00
usb
userspace-api	Remove DECnet support from kernel	2023-06-21 15:45:38 +02:00
virt	KVM: s390: disable migration mode when dirty tracking is disabled	2023-03-11 16:39:58 +01:00
vm	arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL	2022-05-15 20:00:09 +02:00
w1	docs: w1: w1_therm: Fix broken xref, mistakes, clarify text	2020-10-08 09:47:15 +02:00
watchdog
x86	x86/CPU/AMD: Save AMD NodeId as cpu_die_id	2020-12-30 11:54:29 +01:00
xtensa	xtensa: fix TLBTEMP area placement	2020-11-16 02:13:15 -08:00
.gitignore
asm-annotations.rst	x86/entry: Emit a symbol for register restoring thunk	2021-02-03 23:28:40 +01:00
atomic_bitops.txt	locking/atomic: Make test_and_*_bit() ordered on failure	2022-08-25 11:38:10 +02:00
atomic_t.txt
Changes
CodingStyle
conf.py	docs/conf.py: Cope with removal of language=None in Sphinx 5.0.0	2022-06-09 10:21:28 +02:00
COPYING-logo
docutils.conf
dontdiff	kbuild: generate Module.symvers only when vmlinux exists	2021-05-19 10:12:59 +02:00
index.rst
Kconfig	docs: Kconfig/Makefile: add a check for broken ABI files	2020-10-30 13:08:07 +01:00
logo.gif
Makefile	A small number of fixes, plus a build tweak to respect the desire for	2020-11-03 09:57:30 -08:00
memory-barriers.txt
SubmittingPatches
watch_queue.rst