Glauber Costa
2ad306b17c
fork: protect architectures where THREAD_SIZE >= PAGE_SIZE against fork bombs ...
Because those architectures will draw their stacks directly from the page
allocator, rather than the slab cache, we can directly pass __GFP_KMEMCG
flag, and issue the corresponding free_pages.
This code path is taken when the architecture doesn't define
CONFIG_ARCH_THREAD_INFO_ALLOCATOR (only ia64 seems to), and has
THREAD_SIZE >= PAGE_SIZE. Luckily, most - if not all - of the remaining
architectures fall in this category.
This will guarantee that every stack page is accounted to the memcg the
process currently lives on, and will have the allocations to fail if they
go over limit.
For the time being, I am defining a new variant of THREADINFO_GFP, not to
mess with the other path. Once the slab is also tracked by memcg, we can
get rid of that flag.
Tested to successfully protect against :(){ :|:& };:
Signed-off-by: Glauber Costa <glommer@parallels.com>
Acked-by: Frederic Weisbecker <fweisbec@redhat.com>
Acked-by: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-12-18 15:02:13 -08:00
ARM: 7588/1: amba: create a resource parent registrator
2012-12-03 11:15:35 +00:00
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2012-12-14 14:27:45 -08:00
ARM: arm-soc: Updates for Marvell mvebu/kirkwood
2012-12-14 14:54:26 -08:00
This is the MFD patch set for the 3.8 merge window.
2012-12-16 18:55:20 -08:00
This is the MFD patch set for the 3.8 merge window.
2012-12-16 18:55:20 -08:00
ARM: arm-soc: Device-tree updates, take 2
2012-12-14 14:42:53 -08:00
This is the MFD patch set for the 3.8 merge window.
2012-12-16 18:55:20 -08:00
MMC highlights for 3.8:
2012-12-11 11:19:09 -08:00
drivers/video/backlight/lp855x_bl.c: use generic PWM functions
2012-12-17 17:15:16 -08:00
Highlights:
2012-12-13 19:26:04 -08:00
lib/raid6: Add AVX2 optimized gen_syndrome functions
2012-12-13 19:51:03 +11:00
Merge remote-tracking branch 'regulator/topic/tol' into regulator-next
2012-12-10 12:43:22 +09:00
Linux 3.7-rc8
2012-12-07 17:02:47 +00:00
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2012-12-14 14:27:45 -08:00
SUNRPC: Don't allow low priority tasks to pre-empt higher priority ones
2012-12-06 00:30:53 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2012-12-12 18:07:07 -08:00
Merge branch 'x86-acpi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-12-14 10:03:23 -08:00
Revert "libata: check SATA_SETTINGS log with HW Feature Ctrl"
2012-12-14 09:34:01 -05:00
pata_platform: remove unused remove function
2012-12-03 05:15:33 -05:00
ath9k: allow to load EEPROM content via firmware API
2012-12-10 15:49:57 -05:00
atm: add release_cb() callback to vcc
2012-12-02 00:05:12 +00:00
Revert "bdi: add a user-tunable cpu_list for the bdi flusher threads"
2012-12-17 11:29:09 -08:00
backlight: add of_find_backlight_by_node()
2012-12-17 17:15:16 -08:00
mm: introduce a common interface for balloon pages mobility
2012-12-11 17:22:26 -08:00
ssb/bcma: add common header for watchdog
2012-12-06 14:58:56 -05:00
exec: use -ELOOP for max recursion depth
2012-12-17 17:15:23 -08:00
block: discard granularity might not be power of 2
2012-12-14 20:46:04 +01:00
mm/bootmem.c: remove unused wrapper function reserve_bootmem_generic()
2012-12-12 17:38:35 -08:00
bsg: Remove unused function bsg_goose_queue()
2012-12-06 14:33:02 +01:00
The common clock framework changes for 3.8 are comprised of lots of
2012-12-11 11:25:08 -08:00
compat: generic compat_sys_sched_rr_get_interval() implementation
2012-12-17 17:15:18 -08:00
linux/compiler.h: add __must_hold macro for functions called with a lock held
2012-12-17 17:15:23 -08:00
context_tracking: New context tracking susbsystem
2012-11-30 11:40:07 -08:00
cpuset: use N_MEMORY instead N_HIGH_MEMORY
2012-12-12 17:38:32 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2012-12-17 15:44:47 -08:00
Merge branch 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-12-14 09:59:59 -08:00
drivers: cma: represent physical addresses as phys_addr_t
2012-12-11 09:28:09 +01:00
Revert "x86-64/efi: Use EFI to deal with platform wall clock (again)"
2012-12-15 15:20:41 -08:00
fs, exportfs: add exportfs_encode_inode_fh() helper
2012-12-17 17:15:27 -08:00
Merge branch 'for-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2012-12-12 08:18:24 -08:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-12-17 20:58:12 -08:00
lseek: the "whence" argument is called "whence"
2012-12-17 17:15:12 -08:00
mm: allocate kernel pages to the right memcg
2012-12-18 15:02:12 -08:00
propagate name change to comments in kernel source
2012-12-06 10:39:54 +01:00
HID: sensors: autodetect USB HID sensor hubs
2012-12-12 16:49:10 +01:00
Merge branches 'for-3.7/upstream-fixes', 'for-3.8/hidraw', 'for-3.8/i2c-hid', 'for-3.8/multitouch', 'for-3.8/roccat', 'for-3.8/sensors' and 'for-3.8/upstream' into for-linus
2012-12-12 21:41:55 +01:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
wireless: fix VHT max AMPDU exponent definition
2012-12-06 14:02:51 +01:00
netconf: advertise mc_forwarding status
2012-12-04 13:08:10 -05:00
include/linux/init.h: use the stringify operator for the __define_initcall macro
2012-12-17 17:15:12 -08:00
net: Add support for hardware-offloaded encapsulation
2012-12-09 00:20:28 -05:00
net: Add support for hardware-offloaded encapsulation
2012-12-09 00:20:28 -05:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2012-12-13 14:20:19 -08:00
kstrto*: add documentation
2012-12-17 17:15:22 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2012-12-16 15:40:50 -08:00
Merge tag 'kvm-3.8-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2012-12-13 15:31:08 -08:00
libata: implement ata_platform_remove_one()
2012-12-03 05:15:17 -05:00
Merge branch 'for-3.8/drivers' of git://git.kernel.dk/linux-block
2012-12-17 13:39:11 -08:00
memcg: use static branches when code not in use
2012-12-18 15:02:13 -08:00
hotplug: update nodemasks management
2012-12-12 17:38:33 -08:00
mm, memory-hotplug: dynamic configure movable memory and portion memory
2012-12-11 17:22:28 -08:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
[SCSI] miscdevice: Adding support for MPT3SAS_MINOR(222)
2012-12-01 10:07:54 +00:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
Merge branch 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux
2012-12-18 10:56:07 -08:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-12-13 12:00:02 -08:00
NFSv4.1: Move slot table and session struct definitions to nfs4session.h
2012-12-06 00:30:46 +01:00
NFSv4.1: Move the RPC timestamp out of the slot.
2012-12-15 15:21:52 -05:00
mm: cleanup register_node()
2012-12-11 17:22:27 -08:00
numa: add CONFIG_MOVABLE_NODE for movable-dedicated node
2012-12-12 17:38:34 -08:00
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2012-12-18 09:58:09 -08:00
of/i2c: add dummy inline functions for when CONFIG_OF_I2C(_MODULE) isn't defined
2012-12-11 17:30:16 +00:00
mm, oom: fix race when specifying a thread as the oom origin
2012-12-11 17:22:27 -08:00
memory-hotplug: skip HWPoisoned page when offlining pages
2012-12-11 17:22:22 -08:00
mm: introduce a common interface for balloon pages mobility
2012-12-11 17:22:26 -08:00
PCI changes for the v3.8 merge window:
2012-12-13 12:14:47 -08:00
percpu_rw_semaphore: add lockdep annotations
2012-12-17 17:15:18 -08:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-12-17 20:58:12 -08:00
ptrace: introduce PTRACE_O_EXITKILL
2012-12-17 17:15:22 -08:00
prandom: introduce prandom_bytes() and prandom_bytes_state()
2012-12-17 17:15:26 -08:00
context_tracking: New context tracking susbsystem
2012-11-30 11:40:07 -08:00
Merge remote-tracking branch 'regmap/topic/table' into regmap-next
2012-12-11 12:39:32 +09:00
res_counter: return amount of charges after res_counter_uncharge()
2012-12-18 15:02:12 -08:00
mm/rmap, migration: Make rmap_walk_anon() and try_to_unmap_anon() more scalable
2012-12-11 14:43:00 +00:00
pidns: remove unused is_container_init()
2012-12-17 17:15:23 -08:00
mm: support more pagesizes for MAP_HUGETLB/SHM_HUGETLB
2012-12-11 17:22:25 -08:00
net: Add support for hardware-offloaded encapsulation
2012-12-09 00:20:28 -05:00
slab: Simplify bootstrap
2012-12-11 12:14:27 +02:00
net: phy: smsc: force all capable mode if the phy is started in powerdown mode
2012-12-07 12:48:00 -05:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-12-13 12:00:02 -08:00
string: introduce helper to get base file name from given path
2012-12-17 17:15:17 -08:00
lseek: the "whence" argument is called "whence"
2012-12-17 17:15:12 -08:00
net: Add support for hardware-offloaded encapsulation
2012-12-09 00:20:28 -05:00
Thermal: Fix DEFAULT_THERMAL_GOVERNOR
2012-12-12 15:34:48 +08:00
fork: protect architectures where THREAD_SIZE >= PAGE_SIZE against fork bombs
2012-12-18 15:02:13 -08:00
mm, oom: fix race when specifying a thread as the oom origin
2012-12-11 17:22:27 -08:00
net: Add support for hardware-offloaded encapsulation
2012-12-09 00:20:28 -05:00
Automatic NUMA Balancing V11
2012-12-16 15:18:08 -08:00
mm: numa: Add pte updates, hinting and migration stats
2012-12-11 14:42:48 +00:00
writeback: remove nr_pages_dirtied arg from balance_dirty_pages_ratelimited_nr()
2012-12-11 17:22:21 -08:00
