Michael Neuling
2b3f8e87cf
powerpc/tm: Fix userspace stack corruption on signal delivery for active transactions ...
When in an active transaction that takes a signal, we need to be careful with
the stack. It's possible that the stack has moved back up after the tbegin.
The obvious case here is when the tbegin is called inside a function that
returns before a tend. In this case, the stack is part of the checkpointed
transactional memory state. If we write over this non transactionally or in
suspend, we are in trouble because if we get a tm abort, the program counter
and stack pointer will be back at the tbegin but our in memory stack won't be
valid anymore.
To avoid this, when taking a signal in an active transaction, we need to use
the stack pointer from the checkpointed state, rather than the speculated
state. This ensures that the signal context (written tm suspended) will be
written below the stack required for the rollback. The transaction is aborted
becuase of the treclaim, so any memory written between the tbegin and the
signal will be rolled back anyway.
For signals taken in non-TM or suspended mode, we use the
normal/non-checkpointed stack pointer.
Tested with 64 and 32 bit signals
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> # v3.9
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-06-01 08:29:23 +10:00
- Lots of cleanups from Artem, including deletion of some obsolete drivers
2013-05-09 10:15:46 -07:00
doc: Remove unnecessary declarations from Documentation/accounting/getdelays.c
2012-11-26 14:22:21 +01:00
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma
2013-05-09 09:46:45 -07:00
aoe: allow user to disable target failure timeout
2012-12-17 17:15:25 -08:00
ARM: platform specific firmware interfaces for 3.10
2013-05-04 12:33:36 -07:00
arm64: Add simple earlyprintk support
2013-01-22 17:51:01 +00:00
backlight: lp855x: remove duplicate platform data
2013-04-29 18:28:19 -07:00
Documentation: Fix typo in multiple files in Documentation
2012-04-16 14:37:13 +02:00
Documentation: cfq-iosched: update documentation help for cfq tunables
2013-04-09 14:57:06 +02:00
nbd: update documentation and link to mailinglist
2013-02-27 19:10:22 -08:00
ARM: OMAP2+: gpmc: generic timing calculation
2012-11-09 18:07:11 +05:30
mm, memcg: add rss_huge stat to memory.stat
2013-05-07 18:38:26 -07:00
connector: Move cn_test.c away from NLMSG_PUT().
2012-06-26 21:19:02 -07:00
Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-05-05 13:23:27 -07:00
cpuidle: make a single register function for all
2013-04-23 13:45:22 +02:00
CRIS: Update documentation
2012-04-03 13:09:18 +02:00
KEYS: Document asymmetric key type
2012-10-08 13:50:12 +10:30
DM RAID: Add message/status support for changing sync action
2013-04-24 11:42:43 +10:00
Merge branch 'akpm' (incoming from Andrew Morton)
2013-05-24 18:12:15 -07:00
sound updates for v3.10-rc1
2013-05-03 09:10:23 -07:00
lib: devres: Introduce devm_ioremap_resource()
2013-01-22 09:41:43 -08:00
[media] get_dvb_firmware: Fix the location of firmware for Terratec HTC
2013-01-01 11:18:26 -02:00
drm: Add 1600x1200 (UXGA) screen resolution to the built-in EDIDs
2013-04-12 14:06:16 +10:00
Documentation/extcon: porting guide for Android kernel switch driver.
2012-04-20 09:24:27 -07:00
doc: fix quite a few typos within Documentation
2012-11-19 14:28:24 +01:00
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
2013-05-09 13:07:40 -07:00
firmware loader: document firmware cache mechanism
2012-11-14 15:07:18 -08:00
HID: remove x bit from sensor doc
2012-12-14 08:48:59 +01:00
hwmon: (lm75) Add support for the Dallas/Maxim DS7505
2013-05-04 14:49:36 +02:00
i2c: Fix my e-mail address in drivers and documentation
2013-03-22 11:18:34 +01:00
Fix example error_injection_tool
2013-04-02 09:39:55 -07:00
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
IB/ipoib: Add rtnl_link_ops support
2012-09-20 16:49:17 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2013-03-11 07:49:37 -07:00
USB: cdc-wdm: implement IOCTL_WDM_MAX_COMMAND
2013-03-25 13:32:20 -07:00
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
2013-05-07 07:59:19 -07:00
Add size restriction to the kdump documentation
2013-04-02 09:40:03 -07:00
Documentation/laptops: remove depends on CONFIG_EXPERIMENTAL
2013-01-21 14:52:42 -08:00
leds: lp55xx: configure the clock detection
2013-04-01 11:04:53 -07:00
memory: emif: add basic infrastructure for EMIF driver
2012-05-02 00:10:49 -07:00
metag: Basic documentation
2013-03-02 20:09:50 +00:00
mei: bus: Add device enabling and disabling API
2013-04-08 16:57:15 -07:00
mmc: core: Add in support to expose PRV for v4 MMCs
2013-03-22 12:10:42 -04:00
userns: Recommend use of memory control groups.
2013-01-26 22:20:06 -08:00
packet: doc: update timestamping part
2013-04-25 01:22:22 -04:00
NFC: Update pn544 documentation
2013-01-10 01:27:46 +01:00
Documentation: Fix typo in multiple files in Documentation
2012-04-16 14:37:13 +02:00
PCI/MSI: Enable multiple MSIs with pci_enable_msi_block_auto()
2013-01-24 17:25:13 +01:00
PM / hibernate: Correct documentation
2013-05-14 01:58:43 +02:00
powerpc/tm: Fix userspace stack corruption on signal delivery for active transactions
2013-06-01 08:29:23 +10:00
seccomp: Make syscall skipping and nr changes more consistent
2012-10-02 21:14:29 +10:00
rapidio: documentation update for enumeration changes
2013-05-24 16:22:50 -07:00
Merge commit ' 8700c95adb' into timers/nohz
2013-05-02 17:54:19 +02:00
s390/cio: add condev keyword to cio_ignore
2013-05-02 15:50:20 +02:00
sched: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW
2012-09-13 16:52:04 +02:00
[SCSI] qla2xxx: Update copyright dates information in LICENSE.qla2xxx file.
2013-04-06 11:31:30 +01:00
Smack: add support for modification of existing rules
2013-03-19 14:16:42 -07:00
tty: Update serial core API documentation
2013-01-15 21:57:44 -08:00
ASoC: Updates for v3.10
2013-04-15 19:45:16 +02:00
Documentation: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
mm: replace hardcoded 3% with admin_reserve_pages knob
2013-04-29 15:54:36 -07:00
target: Simplify fabric sense data length handling
2012-09-17 17:12:58 -07:00
Thermal: update documentation for thermal_zone_device_register
2013-04-27 09:16:04 +08:00
nohz_full: Add documentation.
2013-04-27 16:41:43 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-04-30 09:36:50 -07:00
USB: remove CONFIG_USB_SUSPEND from Documentation
2013-03-28 14:45:56 -07:00
[media] v4l2: Add a V4L2 driver for SI476X MFD
2013-04-18 21:20:34 -03:00
Merge tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2013-05-05 14:47:31 -07:00
mm: limit growth of 3% hardcoded other user reserve
2013-04-29 15:54:36 -07:00
w1: w1_therm: Add force-pullup option for "broken" sensors
2013-02-18 13:55:24 -08:00
watchdog: core: dt: add support for the timeout-sec dt property
2013-03-01 12:48:36 +01:00
Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-04-30 08:35:20 -07:00
xtensa: document MMUv3 setup sequence
2013-05-09 01:07:09 -07:00
gpio: update gpio Chinese documentation
2013-04-16 18:47:22 +09:00
ImgTec Meta architecture changes for v3.9-rc1
2013-03-03 12:06:09 -08:00
Documentation: Memory barrier semantics of atomic_xchg()
2013-01-08 14:14:55 -08:00
bcache: Documentation updates
2013-04-08 13:33:48 -07:00
clk: add clk_ignore_unused option to keep boot clocks on
2013-04-27 23:03:43 -07:00
Coccinelle: Add support to the SPFLAGS variable
2013-04-08 15:42:03 +02:00
Documentation: remove depends on CONFIG_EXPERIMENTAL
2013-01-11 11:38:03 -08:00
doc: Add x86 CPU0 online/offline feature
2012-11-14 09:39:44 -08:00
crc32: move long comment about crc32 fundamentals to Documentation/
2012-03-23 16:58:37 -07:00
firmware: remove last vestiges of dabusb
2012-11-21 13:03:01 -08:00
Documentation/DMA-API-HOWTO.txt: fix typo
2013-02-27 19:10:23 -08:00
dma-debug: New interfaces to debug dma mapping errors
2012-10-24 17:06:43 +02:00
common: DMA-mapping: add DMA_ATTR_FORCE_CONTIGUOUS attribute
2012-11-29 03:30:34 -08:00
dma-buf: replace dma_buf_export() with dma_buf_export_named()
2013-05-01 16:35:36 +05:30
dmatest: append verify result to results
2013-04-15 09:51:18 +05:30
x86: remove offsets.h from .gitignore and dontdiff
2012-11-19 14:10:53 +01:00
dynamic_debug: dynamic hex dump
2013-01-17 12:19:09 -08:00
Merge branch 'devel'
2012-07-29 21:11:05 -03:00
MCA: delete all remaining traces of microchannel bus support.
2012-05-17 19:06:13 -04:00
Remove GENERIC_GPIO config option
2013-04-16 18:47:19 +09:00
HOWTO: fix double words typo
2012-12-10 15:54:27 +01:00
hwrng: Fix a wrong comment in Documentation/hw_random.txt
2013-03-10 18:16:36 +08:00
Documentation/initrd.txt: Change the location of util-linux
2012-05-25 16:18:34 +02:00
Documentation: remove depends on CONFIG_EXPERIMENTAL
2013-01-11 11:38:03 -08:00
iostats.txt: add easy-to-find description for field 6
2013-04-29 15:18:50 +02:00
ipmi: add options to disable openfirmware and PCI scanning
2013-02-27 19:10:21 -08:00
irqdomain: update documentation
2012-12-05 23:52:10 +00:00
Kernel-doc: Convention: Use a "Return" section to describe return values
2012-11-27 21:08:57 +01:00
xen/tmem: Don't use self[ballooning|shrinking] if frontswap is off.
2013-05-15 10:27:50 -04:00
kthread: Document ways of reducing OS jitter due to per-CPU kthreads
2013-04-27 16:52:47 -07:00
Documentation: Fix "struct kobj_type" to include newer members.
2012-09-04 16:06:34 -07:00
kref: Add kref_get_unless_zero documentation
2012-11-28 18:36:06 +10:00
locking/stat: Fix a typo
2013-02-19 08:42:37 +01:00
wanrouter: completely decouple obsolete code from kernel.
2013-01-31 19:20:33 -05:00
mei: move doc files Documentation/misc-devices/mei
2012-05-09 13:59:09 -07:00
Documentation: ManagementStyle: fixed typo
2012-06-28 12:03:15 +02:00
MD: Fix typos in MD documentation
2013-04-24 11:42:42 +10:00
[media] Documentation/media-framework.txt: fix a sentence
2013-02-08 13:27:13 -02:00
Documentation: Memory barrier semantics of atomic_xchg()
2013-01-08 14:14:55 -08:00
hotplug: update nodemasks management
2012-12-12 17:38:33 -08:00
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
percpu-rw-semaphore: fix documentation typos
2012-09-26 19:56:15 +02:00
pinctrl: document the "GPIO mode" pitfall
2013-03-18 11:03:29 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-04-30 13:47:37 -07:00
pwm: add devm_pwm_get() and devm_pwm_put()
2012-09-10 17:05:45 +02:00
pstore/ftrace: Convert to its own enable/disable debugfs knob
2012-09-06 22:16:58 -07:00
rbtree: move augmented rbtree functionality to rbtree_augmented.h
2012-10-09 16:22:40 +09:00
remoteproc: add rproc_report_crash function to notify rproc crashes
2012-09-18 12:53:22 +03:00
Documentation: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
rtc-proc: permit the /proc/driver/rtc device to use other devices
2012-10-06 03:05:01 +09:00
mfd: smsc: Add support for smsc gpio io/keypad driver
2012-10-01 15:27:48 +02:00
Documentation/sparse.txt: document context annotations for lock checking
2012-12-17 17:15:23 -08:00
stable: Allow merging of backports for serious user-visible performance issues
2012-06-25 12:11:58 -07:00
Documentation: Fix typo in multiple files in Documentation
2012-04-16 14:37:13 +02:00
checkpatch: add Suggested-by as a standard signature
2013-04-29 18:28:20 -07:00
Documentation/sysrq: fix inconstistent help message of sysrq key
2013-04-30 17:04:10 -07:00
percpu: add documentation on this_cpu operations
2013-04-04 10:24:53 -07:00
vfio: Trivial Documentation correction
2012-09-21 10:48:03 -06:00
VME: Move API documentation to Documentation folder
2012-05-08 16:01:34 -07:00
workqueue: reimplement WQ_HIGHPRI using a separate worker_pool
2012-07-13 22:24:45 -07:00
2b3f8e87cf
