Oleg Nesterov 6f4cec22c3 rcu: Eliminate lockless accesses to rcu_sync->gp_count ...

The rcu_sync structure's ->gp_count field is always accessed under the
protection of that same structure's ->rss_lock field, with the exception
of a pair of WARN_ON_ONCE() calls just prior to acquiring that lock in
functions rcu_sync_exit() and rcu_sync_dtor().  These lockless accesses
are unnecessary and impair KCSAN's ability to catch bugs that might be
inserted via other lockless accesses.

This commit therefore moves those WARN_ON_ONCE() calls under the lock.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

2024-07-04 13:48:57 -07:00

..

bpf

Merge tag 'mm-stable-2024-05-17-19-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-05-19 09:21:03 -07:00

cgroup

Merge tag 'sched-urgent-2024-05-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2024-05-19 11:38:15 -07:00

configs

Merge tag 'hardening-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

2024-05-13 14:14:05 -07:00

debug

kdb: Simplify management of tmpbuffer in kdb_read()

2024-04-26 17:13:31 +01:00

dma

Merge tag 'dma-mapping-6.10-2024-05-20' of git://git.infradead.org/users/hch/dma-mapping

2024-05-20 10:23:39 -07:00

entry

entry: Respect changes to system call number by trace_sys_enter()

2024-03-12 13:23:32 +01:00

events

Merge tag 'mm-stable-2024-05-17-19-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-05-19 09:21:03 -07:00

futex

printk: Change type of CONFIG_BASE_SMALL to bool

2024-05-06 17:39:09 +02:00

gcov

gcov: annotate struct gcov_iterator with __counted_by

2023-10-18 14:43:22 -07:00

irq

genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after()

2024-05-24 12:49:35 +02:00

kcsan

kcsan, compiler_types: Introduce __data_racy type qualifier

2024-05-07 11:39:50 -07:00

livepatch

livepatch: Rename KLP_* to KLP_TRANSITION_*

2024-05-09 15:48:01 +02:00

locking

Merge tag 'leds-next-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/leds

2024-05-22 10:49:54 -07:00

module

Merge tag 'driver-core-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2024-05-22 12:13:40 -07:00

power

Merge tag 'pull-set_blocksize' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2024-05-21 08:34:51 -07:00

printk

Merge tag 'tty-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2024-05-22 11:53:02 -07:00

rcu

rcu: Eliminate lockless accesses to rcu_sync->gp_count

2024-07-04 13:48:57 -07:00

sched

Merge tag 'bitmap-for-6.10v2' of https://github.com/norov/linux

2024-05-21 15:29:01 -07:00

time

Merge tag 'sysctl-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl

2024-05-17 17:31:24 -07:00

trace

Merge tag 'trace-fixes-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2024-05-23 12:36:38 -07:00

.gitignore

…

acct.c

kernel misc: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:53 +02:00

async.c

async: Use a dedicated unbound workqueue with raised min_active

2024-02-09 11:13:59 -10:00

audit_fsnotify.c

…

audit_tree.c

fsnotify: create a wrapper fsnotify_find_inode_mark()

2024-04-04 16:24:16 +02:00

audit_watch.c

fsnotify: create a wrapper fsnotify_find_inode_mark()

2024-04-04 16:24:16 +02:00

audit.c

audit: use KMEM_CACHE() instead of kmem_cache_create()

2024-01-25 10:12:22 -05:00

audit.h

audit: correct audit_filter_inodes() definition

2023-07-21 12:17:25 -04:00

auditfilter.c

audit: remove unnecessary assignment in audit_dupe_lsm_field()

2024-01-25 09:59:27 -05:00

auditsc.c

audit,io_uring: io_uring openat triggers audit reference count underflow

2023-10-13 18:34:46 +02:00

backtracetest.c

backtracetest: Convert from tasklet to BH workqueue

2024-02-05 13:22:34 -10:00

bounds.c

bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS

2024-04-29 08:29:29 -07:00

capability.c

lsm: constify the 'target' parameter in security_capget()

2023-08-08 16:48:47 -04:00

cfi.c

…

compat.c

…

configs.c

…

context_tracking.c

context_tracking: Make context_tracking_key __ro_after_init

2024-03-22 11:18:18 +01:00

cpu_pm.c

…

cpu.c

Merge tag 'cgroup-for-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

2024-05-15 17:06:08 -07:00

crash_core.c

Merge tag 'mm-nonmm-stable-2024-05-19-11-56' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-05-19 14:02:03 -07:00

crash_reserve.c

crash: add prefix for crash dumping messages

2024-05-08 08:41:26 -07:00

cred.c

cred: Use KMEM_CACHE() instead of kmem_cache_create()

2024-02-23 17:33:31 -05:00

delayacct.c

delayacct: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:54 +02:00

dma.c

…

elfcorehdr.c

crash: remove dependency of FA_DUMP on CRASH_DUMP

2024-02-23 17:48:22 -08:00

exec_domain.c

…

exit.c

Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

2024-05-23 12:04:36 -07:00

exit.h

exit: add internal include file with helpers

2023-09-21 12:03:50 -06:00

extable.c

…

fail_function.c

…

fork.c

mm: rename mm_put_huge_zero_page to mm_put_huge_zero_folio

2024-04-25 20:56:20 -07:00

freezer.c

Merge tag 'v6.7-rc6' into sched/core, to pick up fixes

2023-12-23 15:52:13 +01:00

gen_kheaders.sh

…

groups.c

groups: Convert group_info.usage to refcount_t

2023-09-29 11:28:39 -07:00

hung_task.c

kernel misc: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:53 +02:00

iomem.c

kernel/iomem.c: remove __weak ioremap_cache helper

2023-08-21 13:37:28 -07:00

irq_work.c

…

jump_label.c

jump_label,module: Don't alloc static_key_mod for __ro_after_init keys

2024-03-22 11:18:16 +01:00

kallsyms_internal.h

kallsyms: Avoid weak references for kallsyms symbols

2024-05-02 19:48:26 +09:00

kallsyms_selftest.c

mm: vmalloc: enable memory allocation profiling

2024-04-25 20:55:57 -07:00

kallsyms_selftest.h

…

kallsyms.c

kallsyms: Avoid weak references for kallsyms symbols

2024-05-02 19:48:26 +09:00

kcmp.c

file: convert to SLAB_TYPESAFE_BY_RCU

2023-10-19 11:02:48 +02:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.kexec

crash: clean up kdump related config items

2024-02-23 17:48:22 -08:00

Kconfig.locks

…

Kconfig.preempt

…

kcov.c

kcov: avoid clang out-of-range warning

2024-04-25 21:07:04 -07:00

kexec_core.c

kernel misc: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:53 +02:00

kexec_elf.c

…

kexec_file.c

crash: add a new kexec flag for hotplug support

2024-04-23 14:59:01 +10:00

kexec_internal.h

crash: remove dependency of FA_DUMP on CRASH_DUMP

2024-02-23 17:48:22 -08:00

kexec.c

crash: add a new kexec flag for hotplug support

2024-04-23 14:59:01 +10:00

kheaders.c

…

kprobes.c

kprobe/ftrace: fix build error due to bad function definition

2024-05-17 19:17:55 -07:00

ksyms_common.c

…

ksysfs.c

vmlinux: Avoid weak reference to notes section

2024-05-02 19:48:26 +09:00

kthread.c

kunit: Handle test faults

2024-05-06 14:22:02 -06:00

latencytop.c

kernel misc: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:53 +02:00

Makefile

crash: split crash dumping code out from kexec_core.c

2024-02-23 17:48:22 -08:00

module_signature.c

…

notifier.c

…

nsproxy.c

pidfd: add pidfs

2024-03-01 12:23:37 +01:00

numa.c

kernel/numa.c: Move logging out of numa.h

2023-12-20 19:26:30 -05:00

padata.c

padata: Disable BH when taking works lock on MT path

2024-04-12 15:07:51 +08:00

panic.c

kernel misc: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:53 +02:00

params.c

params: Fix multi-line comment style

2023-12-01 09:51:44 -08:00

pid_namespace.c

kernel misc: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:53 +02:00

pid_sysctl.h

kernel misc: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:53 +02:00

pid.c

pidfs: remove config option

2024-03-13 12:53:53 -07:00

profile.c

profiling: Remove create_prof_cpu_mask().

2024-04-27 11:17:48 -07:00

ptrace.c

ptrace_attach: shift send(SIGSTOP) into ptrace_set_stopped()

2024-02-22 15:38:52 -08:00

range.c

…

reboot.c

kernel misc: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:53 +02:00

regset.c

regset: use kvzalloc() for regset_get_alloc()

2024-04-25 21:07:03 -07:00

relay.c

kernel: relay: remove relay_file_splice_read dead code, doesn't work

2023-12-29 12:22:27 -08:00

resource_kunit.c

…

resource.c

Merge tag 'mm-nonmm-stable-2024-01-09-10-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-01-09 11:46:20 -08:00

rseq.c

…

scftorture.c

scftorture: Pause testing after memory-allocation failure

2023-07-14 15:02:57 -07:00

scs.c

…

seccomp.c

Merge tag 'sysctl-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl

2024-05-17 17:31:24 -07:00

signal.c

Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

2024-05-23 12:04:36 -07:00

smp.c

Merge tag 'csd-lock.2023.10.23a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu

2023-10-30 17:56:53 -10:00

smpboot.c

kthread: add kthread_stop_put

2023-10-04 10:41:57 -07:00

smpboot.h

…

softirq.c

softirq: Fix suspicious RCU usage in __do_softirq()

2024-04-29 05:03:51 +02:00

stackleak.c

Merge tag 'sysctl-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl

2024-05-17 17:31:24 -07:00

stacktrace.c

stacktrace: fix kernel-doc typo

2023-12-29 12:22:29 -08:00

static_call_inline.c

…

static_call.c

…

stop_machine.c

…

sys_ni.c

mseal: wire up mseal syscall

2024-05-23 19:40:26 -07:00

sys.c

Merge tag 'riscv-for-linus-6.10-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2024-05-22 09:56:00 -07:00

sysctl-test.c

…

sysctl.c

kernel misc: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:53 +02:00

task_work.c

task_work: add kerneldoc annotation for 'data' argument

2023-09-19 13:21:32 -07:00

taskstats.c

taskstats: fill_stats_for_tgid: use for_each_thread()

2023-10-04 10:41:57 -07:00

torture.c

torture: Print out torture module parameters

2023-09-24 17:24:01 +02:00

tracepoint.c

…

tsacct.c

…

ucount.c

Merge tag 'sysctl-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl

2024-05-17 17:31:24 -07:00

uid16.c

…

uid16.h

…

umh.c

umh: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:53 +02:00

up.c

smp: Change function signatures to use call_single_data_t

2023-09-13 14:59:24 +02:00

user_namespace.c

user_namespace: remove unnecessary NULL values from kbuf

2024-02-22 15:38:52 -08:00

user-return-notifier.c

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user.c

printk: Change type of CONFIG_BASE_SMALL to bool

2024-05-06 17:39:09 +02:00

usermode_driver.c

…

utsname_sysctl.c

kernel misc: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:53 +02:00

utsname.c

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vhost_task.c

vhost_task: Handle SIGKILL by flushing work and exiting

2024-05-22 08:31:15 -04:00

vmcore_info.c

mm: free up PG_slab

2024-04-25 20:56:00 -07:00

watch_queue.c

watch_queue: fix kcalloc() arguments order

2023-12-21 13:17:54 +01:00

watchdog_buddy.c

watchdog/hardlockup: move SMP barriers from common code to buddy code

2023-06-19 16:25:28 -07:00

watchdog_perf.c

kernel/watchdog_perf.c: tidy up kerneldoc

2024-05-08 08:41:29 -07:00

watchdog.c

Merge tag 'mm-nonmm-stable-2024-05-19-11-56' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-05-19 14:02:03 -07:00

workqueue_internal.h

workqueue: Drop the special locking rule for worker->flags and worker_pool->flags

2023-08-07 15:57:22 -10:00

workqueue.c

Merge branch 'for-6.10' into test-merge-for-6.10

2024-05-15 11:40:33 -10:00