Elena Reshetova
fbca30c513
lockd: convert nlm_rqst.a_count from atomic_t to refcount_t ...
atomic_t variables are currently used to implement reference
counters with the following properties:
- counter is initialized to 1 using atomic_set()
- a resource is freed upon counter reaching zero
- once counter reaches zero, its further
increments aren't allowed
- counter schema uses basic atomic operations
(set, inc, inc_not_zero, dec_and_test, etc.)
Such atomic variables should be converted to a newly provided
refcount_t type and API that prevents accidental counter overflows
and underflows. This is important since overflows and underflows
can lead to use-after-free situation and be exploitable.
The variable nlm_rqst.a_count is used as pure reference counter.
Convert it to refcount_t and fix up the operations.
**Important note for maintainers:
Some functions from refcount_t API defined in lib/refcount.c
have different memory ordering guarantees than their atomic
counterparts.
The full comparison can be seen in
https://lkml.org/lkml/2017/11/15/57 and it is hopefully soon
in state to be merged to the documentation tree.
Normally the differences should not matter since refcount_t provides
enough guarantees to satisfy the refcounting use cases, but in
some rare cases it might matter.
Please double check that you don't have some undocumented
memory guarantees for this variable usage.
For the nlm_rqst.a_count it might make a difference
in following places:
- nlmclnt_release_call() and nlmsvc_release_call(): decrement
in refcount_dec_and_test() only
provides RELEASE ordering and control dependency on success
vs. fully ordered atomic counterpart
Suggested-by: Kees Cook <keescook@chromium.org>
Reviewed-by: David Windsor <dwindsor@gmail.com>
Reviewed-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
2018-01-14 23:06:30 -05:00
ARM: SoC platform updates for 4.15
2017-11-16 14:05:12 -08:00
dmaengine updates for 4.15-rc1
2017-11-14 16:49:31 -08:00
firmware /meson
kernel/irq: Extend lockdep class for request mutex
2017-12-28 12:26:35 +01:00
iio: stm32: fix adc/trigger link error
2017-12-02 11:21:31 +00:00
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-26 14:39:20 -08:00
lockd: convert nlm_rqst.a_count from atomic_t to refcount_t
2018-01-14 23:06:30 -05:00
mfd: Fix RTS5227 (and others) powermanagement
2017-12-07 10:40:57 +00:00
Updates for 4.15 kernel merge window
2017-11-15 14:54:53 -08:00
Third pull request for 4.15-rc
2017-12-28 23:06:01 -08:00
MMC core:
2017-11-13 10:17:35 -08:00
This pull request contains the following core changes:
2017-11-22 20:46:06 -10:00
USB/PHY patches for 4.15-rc1
2017-11-13 21:14:07 -08:00
This is the bulk of pin control changes for the v4.15
2017-11-16 10:57:11 -08:00
This pull request contains the following core changes:
2017-11-22 20:46:06 -10:00
Merge remote-tracking branches 'regulator/topic/da9211', 'regulator/topic/pfuze100' and 'regulator/topic/tps65218' into regulator-next
2017-11-10 21:33:23 +00:00
mm, oom_reaper: fix memory corruption
2017-12-14 16:00:49 -08:00
We have two changes to the core framework this time around. The first being a
2017-11-17 20:04:24 -08:00
spi: Fix double "when"
2017-11-30 16:55:35 +00:00
sunrpc: make the function arg as const
2017-11-27 16:45:11 -05:00
usbnet: fix alignment for frames with no ethernet header
2017-12-07 14:32:30 -05:00
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-11-17 12:54:01 -08:00
Merge branch 'pm-cpufreq'
2017-11-13 01:34:49 +01:00
audit/stable-4.15 PR 20171113
2017-11-15 13:28:48 -08:00
Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block
2017-11-14 15:32:19 -08:00
writeback: remove unused function parameter
2017-11-15 18:21:07 -08:00
virtio_balloon: fix deadlock on OOM
2017-11-14 23:57:38 +02:00
block-throttle: avoid double charge
2017-12-20 11:10:17 -07:00
include/linux/bitfield.h: include <linux/build_bug.h> instead of <linux/bug.h>
2017-11-17 16:10:01 -08:00
A relatively calm cycle for the docs tree again.
2017-11-13 08:25:06 -08:00
Merge commit 'upstream-x86-entry' into WIP.x86/mm
2017-12-17 12:58:53 +01:00
Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block
2017-11-14 15:32:19 -08:00
Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block
2017-11-14 15:32:19 -08:00
block-throttle: avoid double charge
2017-12-20 11:10:17 -07:00
block: unalign call_single_data in struct request
2017-12-20 13:16:33 -07:00
mm: define memblock_virt_alloc_try_nid_raw
2017-11-15 18:21:05 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
2018-01-10 11:17:21 -05:00
bpf: fix integer overflows
2017-12-21 02:15:41 +01:00
Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block
2017-11-14 15:32:19 -08:00
kernel debug: support resetting WARN_ONCE for all architectures
2017-11-17 16:10:01 -08:00
kmemcheck: remove annotations
2017-11-15 18:21:04 -08:00
Merge branch 'for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2017-11-15 14:29:44 -08:00
Merge branch 'for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2017-11-15 14:29:44 -08:00
Merge branch 'clk-gpio' into clk-next
2017-11-14 10:07:45 -08:00
Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-11-17 11:54:55 -08:00
include/linux/compiler-clang.h: handle randomizable anonymous structs
2017-11-17 16:10:01 -08:00
locking/barriers: Add implicit smp_read_barrier_depends() to READ_ONCE()
2017-12-17 13:57:01 +01:00
locking/lockdep: Remove cross-release leftovers
2018-01-08 17:30:45 +01:00
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-01-14 09:51:25 -08:00
x86 / CPU: Always show current CPU frequency in /proc/cpuinfo
2017-11-15 19:46:50 +01:00
timers: Reinitialize per cpu bases on hotplug
2017-12-29 23:13:09 +01:00
kdump: write correct address of mem_section into vmcoreinfo
2018-01-13 10:42:48 -08:00
kernel: make groups_sort calling a responsibility group_info allocators
2017-12-14 16:00:49 -08:00
TTY/Serial patches for 4.15-rc1
2017-11-13 21:05:31 -08:00
libnvdimm for 4.15
2017-11-17 09:51:57 -08:00
debugfs: fix debugfs_real_fops() build error
2017-11-28 15:24:02 +01:00
A couple of dma-mapping updates:
2017-11-14 16:54:12 -08:00
SCSI fixes on 20171205
2017-12-05 10:31:32 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-11-15 11:56:19 -08:00
efi/capsule-loader: Reinstate virtual capsule mapping
2018-01-03 13:54:31 +01:00
Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block
2017-11-14 15:32:19 -08:00
Merge branch 'akpm' (patches from Andrew)
2017-11-15 19:42:40 -08:00
Merge branch 'pm-sleep'
2017-11-13 01:41:20 +01:00
autofs: revert "autofs: fix AT_NO_AUTOMOUNT not being honored"
2017-11-29 18:40:43 -08:00
fscache: Fix the default for fscache_maybe_release_page()
2018-01-02 10:02:19 +00:00
fscrypt: lots of cleanups, mostly courtesy by Eric Biggers
2017-11-14 11:35:15 -08:00
fscrypt: lots of cleanups, mostly courtesy by Eric Biggers
2017-11-14 11:35:15 -08:00
fscrypt: lots of cleanups, mostly courtesy by Eric Biggers
2017-11-14 11:35:15 -08:00
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2017-11-14 14:13:11 -08:00
Tracing updates for 4.15:
2017-11-17 14:58:01 -08:00
device property: Make fwnode_handle_get() return the fwnode
2017-11-09 00:17:22 +01:00
lib/genalloc.c: make the avail variable an atomic_long_t
2017-11-17 16:10:02 -08:00
Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block
2017-11-14 15:32:19 -08:00
mm: remove __GFP_COLD
2017-11-15 18:21:06 -08:00
Merge branch 'for-4.15/upstream' into for-linus
2017-11-15 11:10:38 +01:00
mm/hmm: constify hmm_devmem_page_get_drvdata() parameter
2017-11-15 18:21:03 -08:00
mm: fix device-dax pud write-faults triggered by get_user_pages()
2017-11-29 18:40:42 -08:00
Drivers: hv: vmbus: Fix a rescind issue
2017-11-28 16:56:26 +01:00
x86/virt, x86/platform: Merge 'struct x86_hyper' into 'struct x86_platform' and 'struct x86_init'
2017-11-10 10:03:12 +01:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 17:56:58 -08:00
include/linux/idr.h: add #include <linux/bug.h>
2017-12-14 16:00:48 -08:00
Tracing updates for 4.15:
2017-11-17 14:58:01 -08:00
pid: remove pidhash
2017-11-17 16:10:04 -08:00
drivers/misc/intel/pti: Rename the header file to free up the namespace
2017-12-17 12:52:34 +01:00
kmemcheck: rip it out
2017-11-15 18:21:05 -08:00
libnvdimm for 4.15
2017-11-17 09:51:57 -08:00
iopoll: avoid -Wint-in-bool-context warning
2017-11-17 16:10:01 -08:00
sysvipc: make get_maxid O(1) again
2017-11-17 16:10:04 -08:00
net: reevalulate autoflowlabel setting after sysctl setting
2017-12-21 13:07:20 -05:00
genirq: Introduce IRQD_CAN_RESERVE flag
2017-12-29 21:13:04 +01:00
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 12:18:10 -08:00
kernel/irq: Extend lockdep class for request mutex
2017-12-28 12:26:35 +01:00
genirq/irqdomain: Rename early argument of irq_domain_activate_irq()
2017-12-29 21:13:04 +01:00
locking/lockdep: Remove cross-release leftovers
2018-01-08 17:30:45 +01:00
kallsyms: take advantage of the new '%px' format
2017-11-29 10:30:13 -08:00
slab, slub, slob: add slab_flags_t
2017-11-15 18:21:01 -08:00
kcov: support comparison operands collection
2017-11-17 16:10:04 -08:00
kernel/panic.c: add TAINT_AUX
2017-11-17 16:10:04 -08:00
security: keys: Replace time_t with time64_t for struct key_preparsed_payload
2017-11-15 16:38:45 +00:00
security: keys: Replace time_t/timespec with time64_t
2017-11-15 16:38:45 +00:00
slab, slub, slob: add slab_flags_t
2017-11-15 18:21:01 -08:00
kprobes: Don't spam the build log with deprecation warnings
2017-11-13 08:00:52 +01:00
treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts
2017-11-21 16:35:54 -08:00
x86,kvm: move qemu/guest FPU switching out to vcpu_run
2017-12-05 21:16:43 +01:00
move libgcc.h to include/linux
2017-12-01 13:09:40 -08:00
Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block
2017-11-14 15:32:19 -08:00
locking/lockdep: Remove cross-release leftovers
2018-01-08 17:30:45 +01:00
A relatively calm cycle for the docs tree again.
2017-11-13 08:25:06 -08:00
mm: zero reserved and unavailable struct pages
2017-11-15 18:21:05 -08:00
mm: migrate: fix an incorrect call of prep_transhuge_page()
2017-11-29 18:40:43 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
2017-11-17 20:21:44 -08:00
mm: introduce get_user_pages_longterm
2017-11-29 18:40:42 -08:00
kmemcheck: remove annotations
2017-11-15 18:21:04 -08:00
libnvdimm for 4.15
2017-11-17 09:51:57 -08:00
mm/mmu_notifier: avoid call to invalidate_range() in range_end()
2017-11-15 18:21:03 -08:00
mm/page_alloc.c: broken deferred calculation
2017-11-15 18:21:07 -08:00
module: export module signature enforcement status
2017-11-08 15:16:36 -05:00
Modules updates for v4.15
2017-11-15 13:46:33 -08:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 17:33:11 -08:00
kmemcheck: remove annotations
2017-11-15 18:21:04 -08:00
net: accept UFO datagrams from tuntap and packet
2017-11-24 01:37:35 +09:00
net: accept UFO datagrams from tuntap and packet
2017-11-24 01:37:35 +09:00
netlink: remove unused NETLINK SKB flags
2017-11-14 21:51:14 +09:00
NFS: Fix nfsstat breakage due to LOOKUPP
2018-01-14 23:06:29 -05:00
NFS client updates for Linux 4.15
2017-11-17 14:18:00 -08:00
NFS client updates for Linux 4.15
2017-11-17 14:18:00 -08:00
mm: fix nodemask printing
2017-11-17 16:10:00 -08:00
NTB: switchtec_ntb: Add skeleton NTB driver
2017-11-18 20:37:12 -05:00
nvme: send uevent for some asynchronous events
2017-11-10 19:53:25 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-11-15 11:56:19 -08:00
pci-v4.15-changes
2017-11-15 15:01:28 -08:00
ARM: SoC driver updates for v4.15
2017-11-16 16:05:01 -08:00
mm, oom_reaper: fix memory corruption
2017-12-14 16:00:49 -08:00
mm, arch: remove empty_bad_page*
2017-11-15 18:21:03 -08:00
mm: distinguish CMA and MOVABLE isolation in has_unmovable_pages()
2017-11-15 18:21:02 -08:00
mm, compaction: persistently skip hugetlbfs pageblocks
2017-11-17 16:10:00 -08:00
mm: remove __GFP_COLD
2017-11-15 18:21:06 -08:00
mm, pagevec: rename pagevec drained field
2017-11-15 18:21:06 -08:00
vfs: add path_put_init()
2017-11-09 10:23:28 +01:00
PCI: Add pci_get_domain_bus_and_slot() stub
2017-12-06 14:55:05 -06:00
bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type
2017-12-05 15:02:40 +01:00
pid: remove pidhash
2017-11-17 16:10:04 -08:00
pid: remove pidhash
2017-11-17 16:10:04 -08:00
pipe: add proc_dopipe_max_size() to safely assign pipe_max_size
2017-11-17 16:10:03 -08:00
PM / sleep: Avoid excess pm_runtime_enable() calls in device_resume()
2017-12-11 14:32:56 +01:00
Merge branch 'pm-qos'
2017-11-13 01:33:48 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk
2017-11-21 05:28:13 -10:00
device property: Add a macro for interating over graph endpoints
2017-11-09 00:17:23 +01:00
x86/mm/pti: Add infrastructure for page table isolation
2017-12-23 21:12:59 +01:00
ptr_ring: add barriers
2017-12-11 10:52:23 -05:00
remoteproc updates for v4.15
2017-11-17 20:14:10 -08:00
include/linux/radix-tree.h: remove unneeded #include <linux/bug.h>
2017-11-17 16:10:01 -08:00
lib/rbtree,drm/mm: add rbtree_replace_node_cached()
2017-12-14 16:00:48 -08:00
locking/barriers: Convert users of lockless_dereference() to READ_ONCE()
2017-12-17 13:57:15 +01:00
net: remove hlist_nulls_add_tail_rcu()
2017-12-05 18:06:09 -05:00
locking/barriers: Convert users of lockless_dereference() to READ_ONCE()
2017-12-17 13:57:15 +01:00
kernel/reboot.c: add devm_register_reboot_notifier()
2017-11-17 16:10:04 -08:00
kmemcheck: remove annotations
2017-11-15 18:21:04 -08:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 17:56:58 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-11-15 11:56:19 -08:00
locking/core: Remove break_lock field when CONFIG_GENERIC_LOCKBREAK=y
2017-12-12 11:24:01 +01:00
main drm pull request for v4.15
2017-11-15 20:42:10 -08:00
Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-12-15 11:44:59 -08:00
serdev: fix receive_buf return value when no callback
2017-11-28 16:00:50 +01:00
sh_eth: fix SH7757 GEther initialization
2018-01-05 13:59:18 -05:00
main drm pull request for v4.15
2017-11-15 20:42:10 -08:00
skbuff: Grammar s/are can/can/, s/change/changes/
2017-11-30 09:15:53 -05:00
mm: remove __GFP_COLD
2017-11-15 18:21:06 -08:00
slab, slub, slob: add slab_flags_t
2017-11-15 18:21:01 -08:00
slab, slub, slob: add slab_flags_t
2017-11-15 18:21:01 -08:00
locking/core: Remove break_lock field when CONFIG_GENERIC_LOCKBREAK=y
2017-12-12 11:24:01 +01:00
locking/core: Remove break_lock field when CONFIG_GENERIC_LOCKBREAK=y
2017-12-12 11:24:01 +01:00
string.h: workaround for increased stack usage
2017-12-14 16:00:48 -08:00
mm: remove cold parameter for release_pages
2017-11-15 18:21:06 -08:00
NTB: switchtec_ntb: Introduce initial NTB driver
2017-11-18 20:37:12 -05:00
pipe: add proc_dopipe_max_size() to safely assign pipe_max_size
2017-11-17 16:10:03 -08:00
efi: Move some sysfs files to be read-only by root
2017-12-06 19:31:39 +01:00
tcp: invalidate rate samples during SACK reneging
2017-12-08 10:07:02 -05:00
kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK
2017-11-15 18:21:04 -08:00
cpufreq: schedutil: Use idle_calls counter of the remote CPU
2017-12-28 12:26:54 +01:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 17:56:58 -08:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 17:56:58 -08:00
timekeeping: Remove CONFIG_GENERIC_TIME_VSYSCALL_OLD
2017-11-14 11:20:25 +01:00
Merge branch 'linus' into timers/urgent
2017-11-14 10:01:49 +01:00
timers: Reinitialize per cpu bases on hotplug
2017-12-29 23:13:09 +01:00
tracing: Pass export pointer as argument to ->write()
2017-12-04 07:14:30 -05:00
Tracing updates for 4.15:
2017-11-17 14:58:01 -08:00
slab, slub, slob: convert slab_flags_t to 32-bit
2017-11-15 18:21:01 -08:00
sound updates for 4.15-rc1
2017-11-14 18:01:46 -08:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2017-11-16 12:20:15 -08:00
net: accept UFO datagrams from tuntap and packet
2017-11-24 01:37:35 +09:00
mm, sysctl: make NUMA stats configurable
2017-11-15 18:21:07 -08:00
Pass mode to wait_on_atomic_t() action funcs and provide default actions
2017-11-13 15:38:16 +00:00
treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts
2017-11-21 16:35:54 -08:00
block/laptop_mode: Convert timers to use timer_setup()
2017-11-21 15:46:44 -08:00
