Josh Poimboeuf fb799447ae x86,objtool: Split UNWIND_HINT_EMPTY in two ... Mark reported that the ORC unwinder incorrectly marks an unwind as reliable when the unwind terminates prematurely in the dark corners of return_to_handler() due to lack of information about the next frame. The problem is UNWIND_HINT_EMPTY is used in two different situations: 1) The end of the kernel stack unwind before hitting user entry, boot code, or fork entry 2) A blind spot in ORC coverage where the unwinder has to bail due to lack of information about the next frame The ORC unwinder has no way to tell the difference between the two. When it encounters an undefined stack state with 'end=1', it blindly marks the stack reliable, which can break the livepatch consistency model. Fix it by splitting UNWIND_HINT_EMPTY into UNWIND_HINT_UNDEFINED and UNWIND_HINT_END_OF_STACK. Reported-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/fd6212c8b450d3564b855e1cb48404d6277b4d9f.1677683419.git.jpoimboe@kernel.org		2023-03-23 23:18:58 +01:00
..
ABI	power supply changes for the v6.3 series (part 2)	2023-03-03 16:33:28 -08:00
accel	Documentation: accel: escape wildcard in special file path	2023-01-26 11:52:14 +02:00
accounting
admin-guide	A small set of updates for x86:	2023-03-05 11:27:48 -08:00
arc
arm
arm64	arm64 updates for 6.3:	2023-02-21 15:27:48 -08:00
block	block: stub out and deprecated the capability attribute on the gendisk	2023-02-06 08:44:55 -07:00
bpf	Documentation: bpf: Add missing line break separator in node_data struct code block	2023-02-15 08:43:51 -08:00
cdrom
core-api	- Daniel Verkamp has contributed a memfd series ("mm/memfd: add	2023-02-23 17:09:35 -08:00
cpu-freq	Docs/subsystem-apis: Remove '[The ]Linux' prefixes from titles of listed documents	2023-01-24 15:27:08 -07:00
crypto	Docs/subsystem-apis: Remove '[The ]Linux' prefixes from titles of listed documents	2023-01-24 15:27:08 -07:00
dev-tools	- Daniel Verkamp has contributed a memfd series ("mm/memfd: add	2023-02-23 17:09:35 -08:00
devicetree	sound fixes for 6.3-rc1	2023-03-04 10:53:59 -08:00
doc-guide
driver-api	media updates for v6.3-rc1	2023-02-26 11:47:26 -08:00
fault-injection	docs: fault-injection: add requirements of error injectable functions	2023-02-02 22:50:00 -08:00
fb
features	m68k: Add kernel seccomp support	2023-01-30 16:40:15 +01:00
filesystems	f2fs-for-6.3-rc1	2023-02-27 16:18:51 -08:00
firmware_class
firmware-guide	Documentation: firmware-guide: gpio-properties: Clarify Explicit and Implicit	2023-02-14 15:50:09 +01:00
fpga
gpu	drm next for 6.3-rc1	2023-02-22 18:28:03 -08:00
hid	It has been a moderately calm cycle for documentation; the significant	2023-02-22 12:00:20 -08:00
hwmon	It has been a moderately calm cycle for documentation; the significant	2023-02-22 12:00:20 -08:00
i2c	Documentation: i2c: correct spelling	2023-02-15 20:59:44 +01:00
ia64
iio
images
infiniband
input	Docs/subsystem-apis: Remove '[The ]Linux' prefixes from titles of listed documents	2023-01-24 15:27:08 -07:00
isdn	Documentation: isdn: correct spelling	2023-02-10 16:28:13 -08:00
kbuild	Kbuild updates for v6.3	2023-02-26 11:53:25 -08:00
kernel-hacking
leds	- Remove Drivers	2023-02-23 15:09:31 -08:00
litmus-tests
livepatch	x86,objtool: Split UNWIND_HINT_EMPTY in two	2023-03-23 23:18:58 +01:00
locking	docs: locking: refer to the actual existing config names	2023-02-23 12:26:00 -07:00
loongarch
m68k
maintainer
mhi
mips
misc-devices
mm	- Daniel Verkamp has contributed a memfd series ("mm/memfd: add	2023-02-23 17:09:35 -08:00
netlabel
netlink	netdev-genl: fix repeated typo oflloading -> offloading	2023-02-24 11:01:16 +00:00
networking	Including fixes from wireless and netfilter.	2023-02-27 14:05:08 -08:00
nios2
nvdimm
nvme
openrisc
parisc
PCI	Docs/subsystem-apis: Remove '[The ]Linux' prefixes from titles of listed documents	2023-01-24 15:27:08 -07:00
pcmcia
peci	Docs/subsystem-apis: Remove '[The ]Linux' prefixes from titles of listed documents	2023-01-24 15:27:08 -07:00
power	Power management updates for 6.3-rc1	2023-02-21 12:13:58 -08:00
powerpc
process	A handful of documentation patches that were ready before the merge window,	2023-02-28 16:01:08 -08:00
RCU
riscv	Documentation: riscv: fix insufficient list item indent	2023-02-14 16:00:02 -08:00
rust	Documentation: rust: Fix arch support table	2023-02-13 10:14:32 +01:00
s390	VFIO updates for v6.3-rc1	2023-02-25 11:52:57 -08:00
scheduler	RISC-V Patches for the 6.3 Merge Window, Part 1	2023-02-25 11:14:08 -08:00
scsi	SCSI misc on 20230222	2023-02-22 13:41:41 -08:00
security
sh
sound	It has been a moderately calm cycle for documentation; the significant	2023-02-22 12:00:20 -08:00
sparc	Documentation: sparc: correct spelling	2023-02-02 11:07:02 -07:00
sphinx	docs: Use HTML comments for the kernel-toc SPDX line	2023-02-16 16:06:44 -07:00
sphinx-static	docs: Add more information to the HTML sidebar	2023-02-08 13:28:27 -07:00
spi	spi: correct spelling	2023-01-27 12:14:17 +00:00
staging
target	scsi: target: Documentation: Correct spelling	2023-02-08 18:49:48 -05:00
timers
tools	Documentation/rtla: Add hwnoise man page	2023-02-13 23:56:46 -05:00
trace	Char/Misc and other driver subsystem changes for 6.3-rc1	2023-02-24 12:47:33 -08:00
translations	A handful of documentation patches that were ready before the merge window,	2023-02-28 16:01:08 -08:00
usb	usb: gadget: configfs: Support arbitrary string descriptors	2023-02-07 08:46:36 +01:00
userspace-api	media updates for v6.3-rc1	2023-02-26 11:47:26 -08:00
virt	ARM:	2023-02-25 11:30:21 -08:00
w1
watchdog	Documentation/watchdog/hpwdt: Fix Format	2023-02-16 17:31:29 -07:00
x86	It has been a moderately calm cycle for documentation; the significant	2023-02-22 12:00:20 -08:00
xtensa
.gitignore
arch.rst
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py	It has been a moderately calm cycle for documentation; the significant	2023-02-22 12:00:20 -08:00
docutils.conf
dontdiff	scripts: remove bin2c	2023-01-26 12:43:33 +09:00
index.rst	Documentation: front page: use recommended heading adornments	2023-02-23 12:44:51 -07:00
Kconfig
Makefile
memory-barriers.txt
SubmittingPatches
subsystem-apis.rst