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Kuniyuki Iwashima f177b382c3 sysctl: Fix data-races in proc_dou8vec_minmax(). 
commit 7dee5d7747a69aa2be41f04c6a7ecfe3ac8cdf18 upstream.

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_dou8vec_minmax() to use READ_ONCE() and
WRITE_ONCE() internally to fix data-races on the sysctl side.  For now,
proc_dou8vec_minmax() itself is tolerant to a data-race, but we still
need to add annotations on the other subsystem's side.

Fixes: cb9444130662 ("sysctl: add proc_dou8vec_minmax()")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-04-20 12:10:29 +02:00
..
bpf
bpf: Adjust insufficient default bpf_jit_limit
2023-04-05 11:23:35 +02:00
cgroup
cgroup/cpuset: Wake up cpuset_attach_wq tasks in cpuset_cancel_attach()
2023-04-20 12:10:27 +02:00
configs
…
debug
lockdown: also lock down previous kgdb use
2022-05-30 09:33:22 +02:00
dma
swiotlb: max mapping size takes min align mask into account
2022-10-05 10:38:40 +02:00
entry
entry/kvm: Exit to user mode when TIF_NOTIFY_SIGNAL is set
2023-01-04 11:39:22 +01:00
events
perf/core: Fix the same task check in perf_event_set_output
2023-04-20 12:10:23 +02:00
futex
futex: Resend potentially swallowed owner death notification
2023-01-14 10:15:20 +01:00
gcov
gcov: add support for checksum field
2023-01-14 10:16:24 +01:00
irq
irqdomain: Fix domain registration race
2023-03-17 08:45:08 +01:00
kcsan
kcsan: avoid passing -g for test
2023-04-05 11:23:44 +02:00
livepatch
livepatch: fix race between fork and KLP transition
2022-10-26 13:25:14 +02:00
locking
locking/lockdep: Fix lockdep_init_map_*() confusion
2022-08-21 15:15:33 +02:00
power
PM: EM: fix memory leak with using debugfs_lookup()
2023-03-11 16:39:51 +01:00
printk
printk: fix return value of printk.devkmsg __setup handler
2022-04-08 14:40:08 +02:00
rcu
rcu-tasks: Make rude RCU-Tasks work well with CPU hotplug
2023-03-11 16:39:49 +01:00
sched
sched/fair: Fix imbalance overflow
2023-04-20 12:10:28 +02:00
time
clocksource: Suspend the watchdog temporarily when high read latency detected
2023-03-11 16:39:50 +01:00
trace
ring-buffer: Fix race while reader and writer are on the same page
2023-04-20 12:10:24 +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
acct: fix potential integer overflow in encode_comp_t()
2023-01-14 10:16:14 +01:00
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
audit: fix potential double free on error path from fsnotify_add_inode_mark
2022-08-31 17:15:13 +02:00
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
…
auditsc.c
audit: log AUDIT_TIME_* records only from rules
2022-04-08 14:40:00 +02:00
backtracetest.c
…
bounds.c
…
capability.c
…
compat.c
sched_getaffinity: don't assume 'cpumask_size()' is fully initialized
2023-04-05 11:23:45 +02:00
configs.c
…
context_tracking.c
…
cpu_pm.c
PM: cpu: Make notifier chain use a raw_spinlock_t
2021-09-15 09:50:40 +02:00
cpu.c
cpu/hotplug: Make target_store() a nop when target == state
2023-01-14 10:15:20 +01:00
crash_core.c
crash_core, vmcoreinfo: append 'SECTION_SIZE_BITS' to vmcoreinfo
2021-06-23 14:42:52 +02:00
crash_dump.c
…
cred.c
Revert "Add a reference to ucounts for each cred"
2021-09-08 08:49:00 +02:00
delayacct.c
…
dma.c
…
exec_domain.c
…
exit.c
exit: Use READ_ONCE() for all oops/warn limit reads
2023-02-01 08:23:21 +01:00
extable.c
…
fail_function.c
kernel/fail_function: fix memory leak with using debugfs_lookup()
2023-03-11 16:40:18 +01:00
fork.c
fork: allow CLONE_NEWTIME in clone3 flags
2023-03-17 08:45:06 +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
gen_kheaders.sh
…
groups.c
…
hung_task.c
kernel/hung_task.c: make type annotations consistent
2020-11-02 12:14:19 -08:00
iomem.c
…
irq_work.c
…
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
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
…
kexec_core.c
panic, kexec: make __crash_kexec() NMI safe
2023-04-20 12:10:29 +02:00
kexec_elf.c
…
kexec_file.c
panic, kexec: make __crash_kexec() NMI safe
2023-04-20 12:10:29 +02:00
kexec_internal.h
panic, kexec: make __crash_kexec() NMI safe
2023-04-20 12:10:29 +02:00
kexec.c
panic, kexec: make __crash_kexec() NMI safe
2023-04-20 12:10:29 +02:00
kheaders.c
…
kmod.c
…
kprobes.c
x86/kprobes: Fix arch_check_optimized_kprobe check within optimized_kprobe range
2023-03-11 16:39:59 +01:00
ksysfs.c
kexec: turn all kexec_mutex acquisitions into trylocks
2023-04-20 12:10:29 +02:00
kthread.c
kthread: Fix PF_KTHREAD vs to_kthread() race
2021-09-03 10:09:31 +02:00
latencytop.c
…
Makefile
futex: Move to kernel/futex/
2023-01-14 10:15:20 +01:00
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
…
module.c
module: Don't wait for GOING modules
2023-02-01 08:23:22 +01:00
notifier.c
…
nsproxy.c
…
padata.c
padata: Fix list iterator in padata_do_serial()
2023-01-14 10:15:51 +01:00
panic.c
exit: Use READ_ONCE() for all oops/warn limit reads
2023-02-01 08:23:21 +01:00
params.c
params: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
pid_namespace.c
rcu-tasks: Fix synchronize_rcu_tasks() VS zap_pid_ns_processes()
2023-03-11 16:39:19 +01:00
pid.c
exec: Transform exec_update_mutex into a rw_semaphore
2021-01-09 13:46:24 +01:00
profile.c
profiling: fix shift too large makes kernel panic
2022-08-21 15:16:05 +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
…
relay.c
relay: fix type mismatch when allocating memory in relay_create_buf()
2023-01-14 10:15:22 +01:00
resource.c
dax/kmem: Fix leak of memory-hotplug resources
2023-03-11 16:40:04 +01:00
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
…
seccomp.c
seccomp: Fix setting loaded filter count during TSYNC
2021-08-18 08:59:06 +02:00
signal.c
task_work: unconditionally run task_work from get_signal()
2023-01-04 11:39:23 +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
…
softirq.c
…
stackleak.c
gcc-plugins/stackleak: Use noinstr in favor of notrace
2022-02-23 12:01:00 +01:00
stacktrace.c
…
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
kernel/sys_ni: add compat entry for fadvise64_64
2022-08-31 17:15:13 +02:00
sys.c
prlimit: do_prlimit needs to have a speculation check
2023-01-24 07:19:58 +01:00
sysctl-test.c
…
sysctl.c
sysctl: Fix data-races in proc_dou8vec_minmax().
2023-04-20 12:10:29 +02:00
task_work.c
task_work: add helper for more targeted task_work canceling
2023-01-04 11:39:23 +01:00
taskstats.c
…
test_kprobes.c
…
torture.c
…
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
…
uid16.h
…
umh.c
…
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
…
user.c
…
usermode_driver.c
bpf: Fix umd memory leak in copy_process()
2021-03-30 14:32:03 +02:00
utsname_sysctl.c
…
utsname.c
…
watch_queue.c
watch_queue: fix IOC_WATCH_QUEUE_SET_SIZE alloc error paths
2023-03-17 08:45:13 +01:00
watchdog_hld.c
…
watchdog.c
watchdog: export lockup_detector_reconfigure
2022-08-25 11:38:20 +02:00
workqueue_internal.h
…
workqueue.c
workqueue: don't skip lockdep work dependency in cancel_work_sync()
2022-09-28 11:10:40 +02:00