Kuniyuki Iwashima 80cc28a4b4 sysctl: Fix data races in proc_dointvec(). ...

[ Upstream commit 1f1be04b4d ]

A sysctl variable is accessed concurrently, and there is always a chance
of data-race.  So, all readers and writers need some basic protection to
avoid load/store-tearing.

This patch changes proc_dointvec() to use READ_ONCE() and WRITE_ONCE()
internally to fix data-races on the sysctl side.  For now, proc_dointvec()
itself is tolerant to a data-race, but we still need to add annotations on
the other subsystem's side.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2022-07-21 21:20:06 +02:00

..

bpf

bpf: Fix insufficient bounds propagation from adjust_scalar_min_max_vals

2022-07-12 16:32:17 +02:00

cgroup

cgroup: Use separate src/dst nodes when preloading css_sets for migration

2022-07-21 21:20:00 +02:00

configs

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debug

lockdown: also lock down previous kgdb use

2022-05-30 09:33:22 +02:00

dma

dma-direct: don't over-decrypt memory

2022-06-22 14:13:20 +02:00

entry

KVM: rseq: Update rseq when processing NOTIFY_RESUME on xfer to KVM guest

2021-10-06 15:55:49 +02:00

events

perf: Fix sys_perf_event_open() race against self

2022-05-25 09:17:55 +02:00

gcov

gcov: re-fix clang-11+ support

2021-04-14 08:41:58 +02:00

irq

random: remove unused irq_flags argument from add_interrupt_randomness()

2022-05-30 09:33:27 +02:00

kcsan

kcsan: Fix debugfs initcall return type

2021-05-26 12:06:54 +02:00

livepatch

livepatch: Fix build failure on 32 bits processors

2022-04-08 14:40:15 +02:00

locking

locking/lockdep: Iterate lock_classes directly when reading lockdep files

2022-04-08 14:40:32 +02:00

power

PM: suspend: fix return value of __setup handler

2022-04-08 14:40:01 +02:00

printk

printk: fix return value of printk.devkmsg __setup handler

2022-04-08 14:40:08 +02:00

rcu

rcu: Make TASKS_RUDE_RCU select IRQ_WORK

2022-06-09 10:20:51 +02:00

sched

sched/fair: Fix cfs_rq_clock_pelt() for throttled cfs_rq

2022-06-09 10:21:02 +02:00

time

fix race between exit_itimers() and /proc/pid/timers

2022-07-21 21:19:59 +02:00

trace

tracing/histograms: Fix memory leak problem

2022-07-21 21:19:59 +02:00

.gitignore

kbuild: update config_data.gz only when the content of .config is changed

2021-05-11 14:47:37 +02:00

acct.c

kernel: acct.c: fix some kernel-doc nits

2020-10-16 11:11:19 -07:00

async.c

Revert "module, async: async_synchronize_full() on module init iff async is used"

2022-02-23 12:01:00 +01:00

audit_fsnotify.c

fsnotify: generalize handle_inode_event()

2020-12-30 11:54:18 +01:00

audit_tree.c

audit: move put_tree() to avoid trim_trees refcount underflow and UAF

2021-09-03 10:09:31 +02:00

audit_watch.c

fsnotify: generalize handle_inode_event()

2020-12-30 11:54:18 +01:00

audit.c

audit: improve audit queue handling when "audit=1" on cmdline

2022-02-08 18:30:34 +01:00

audit.h

audit: log AUDIT_TIME_* records only from rules

2022-04-08 14:40:00 +02:00

auditfilter.c

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auditsc.c

audit: log AUDIT_TIME_* records only from rules

2022-04-08 14:40:00 +02:00

backtracetest.c

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bounds.c

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capability.c

LSM: Signal to SafeSetID when setting group IDs

2020-10-13 09:17:34 -07:00

compat.c

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configs.c

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context_tracking.c

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cpu_pm.c

PM: cpu: Make notifier chain use a raw_spinlock_t

2021-09-15 09:50:40 +02:00

cpu.c

random: clear fast pool, crng, and batches in cpuhp bring up

2022-05-30 09:33:36 +02:00

crash_core.c

crash_core, vmcoreinfo: append 'SECTION_SIZE_BITS' to vmcoreinfo

2021-06-23 14:42:52 +02:00

crash_dump.c

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cred.c

Revert "Add a reference to ucounts for each cred"

2021-09-08 08:49:00 +02:00

delayacct.c

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dma.c

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exec_domain.c

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exit.c

fix race between exit_itimers() and /proc/pid/timers

2022-07-21 21:19:59 +02:00

extable.c

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fail_function.c

fail_function: Remove a redundant mutex unlock

2020-11-19 11:58:16 -08:00

fork.c

copy_process(): Move fd_install() out of sighand->siglock critical section

2022-02-23 12:01:08 +01:00

freezer.c

Revert "kernel: freezer should treat PF_IO_WORKER like PF_KTHREAD for freezing"

2021-04-07 15:00:14 +02:00

futex.c

mm, futex: fix shared futex pgoff on shmem huge page

2021-06-30 08:47:29 -04:00

gen_kheaders.sh

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groups.c

LSM: Signal to SafeSetID when setting group IDs

2020-10-13 09:17:34 -07:00

hung_task.c

kernel/hung_task.c: make type annotations consistent

2020-11-02 12:14:19 -08:00

iomem.c

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irq_work.c

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jump_label.c

jump_label: Fix jump_label_text_reserved() vs __init

2021-07-20 16:05:58 +02:00

kallsyms.c

treewide: Convert macro and uses of __section(foo) to __section("foo")

2020-10-25 14:51:49 -07:00

kcmp.c

exec: Transform exec_update_mutex into a rw_semaphore

2021-01-09 13:46:24 +01:00

Kconfig.freezer

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Kconfig.hz

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Kconfig.locks

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Kconfig.preempt

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kcov.c

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kexec_core.c

kernel: kexec: remove the lock operation of system_transition_mutex

2021-02-03 23:28:37 +01:00

kexec_elf.c

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kexec_file.c

kexec_file: drop weak attribute from arch_kexec_apply_relocations[_add]

2022-06-09 10:21:26 +02:00

kexec_internal.h

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kexec.c

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kheaders.c

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kmod.c

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kprobes.c

kprobes: Limit max data_size of the kretprobe instances

2021-12-08 09:03:20 +01:00

ksysfs.c

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kthread.c

kthread: Fix PF_KTHREAD vs to_kthread() race

2021-09-03 10:09:31 +02:00

latencytop.c

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Makefile

kbuild: update config_data.gz only when the content of .config is changed

2021-05-11 14:47:37 +02:00

module_signature.c

module: harden ELF info handling

2021-03-25 09:04:11 +01:00

module_signing.c

module: harden ELF info handling

2021-03-25 09:04:11 +01:00

module-internal.h

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module.c

module: check for exit sections in layout_sections() instead of module_init_section()

2022-05-25 09:18:02 +02:00

notifier.c

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nsproxy.c

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padata.c

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panic.c

panic: don't dump stack twice on warn

2020-11-14 11:26:04 -08:00

params.c

params: Replace zero-length array with flexible-array member

2020-10-29 17:22:59 -05:00

pid_namespace.c

memcg: enable accounting for pids in nested pid namespaces

2021-09-18 13:40:36 +02:00

pid.c

exec: Transform exec_update_mutex into a rw_semaphore

2021-01-09 13:46:24 +01:00

profile.c

profiling: fix shift-out-of-bounds bugs

2021-09-26 14:08:58 +02:00

ptrace.c

ptrace: Reimplement PTRACE_KILL by always sending SIGKILL

2022-06-09 10:20:49 +02:00

range.c

kernel.h: split out min()/max() et al. helpers

2020-10-16 11:11:19 -07:00

reboot.c

reboot: fix overflow parsing reboot cpu number

2020-11-14 11:26:03 -08:00

regset.c

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relay.c

kernel/relay.c: drop unneeded initialization

2020-10-16 11:11:22 -07:00

resource.c

kernel/resource: make walk_mem_res() find all busy IORESOURCE_MEM resources

2021-05-19 10:13:09 +02:00

rseq.c

rseq: Remove broken uapi field layout on 32-bit little endian

2022-04-08 14:40:03 +02:00

scftorture.c

scftorture: Fix distribution of short handler delays

2022-06-09 10:21:01 +02:00

scs.c

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seccomp.c

seccomp: Fix setting loaded filter count during TSYNC

2021-08-18 08:59:06 +02:00

signal.c

signal: Remove the bogus sigkill_pending in ptrace_stop

2021-11-18 14:03:47 +01:00

smp.c

smp: Fix offline cpu check in flush_smp_call_function_queue()

2022-04-20 09:23:29 +02:00

smpboot.c

sched/core: Initialize the idle task with preemption disabled

2021-07-14 16:55:50 +02:00

smpboot.h

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softirq.c

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stackleak.c

gcc-plugins/stackleak: Use noinstr in favor of notrace

2022-02-23 12:01:00 +01:00

stacktrace.c

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static_call.c

static_call: Fix unused variable warn w/o MODULE

2021-09-08 08:49:00 +02:00

stop_machine.c

stop_machine, rcu: Mark functions as notrace

2020-10-26 12:12:27 +01:00

sys_ni.c

mm/madvise: introduce process_madvise() syscall: an external memory hinting API

2020-10-18 09:27:10 -07:00

sys.c

prctl: allow to setup brk for et_dyn executables

2021-09-26 14:08:57 +02:00

sysctl-test.c

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sysctl.c

sysctl: Fix data races in proc_dointvec().

2022-07-21 21:20:06 +02:00

task_work.c

task_work: cleanup notification modes

2020-10-17 15:05:30 -06:00

taskstats.c

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test_kprobes.c

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torture.c

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tracepoint.c

tracepoint: Use rcu get state and cond sync for static call updates

2021-09-03 10:09:30 +02:00

tsacct.c

taskstats: Cleanup the use of task->exit_code

2022-01-27 10:54:33 +01:00

ucount.c

Revert "Add a reference to ucounts for each cred"

2021-09-08 08:49:00 +02:00

uid16.c

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uid16.h

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umh.c

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up.c

smp: Fix smp_call_function_single_async prototype

2021-05-14 09:50:46 +02:00

user_namespace.c

Revert "Add a reference to ucounts for each cred"

2021-09-08 08:49:00 +02:00

user-return-notifier.c

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user.c

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usermode_driver.c

bpf: Fix umd memory leak in copy_process()

2021-03-30 14:32:03 +02:00

utsname_sysctl.c

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utsname.c

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watch_queue.c

watch_queue: Free the page array when watch_queue is dismantled

2022-04-08 14:40:41 +02:00

watchdog_hld.c

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watchdog.c

watchdog: fix barriers when printing backtraces from all CPUs

2021-05-19 10:13:00 +02:00

workqueue_internal.h

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workqueue.c

workqueue: Fix unbind_workers() VS wq_worker_running() race

2022-01-16 09:14:22 +01:00