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linux/kernel
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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
The usual shower of singleton fixes and minor series all over MM,
2024-05-19 09:21:03 -07:00
cgroup
Misc fixes:
2024-05-19 11:38:15 -07:00
configs
hardening updates for 6.10-rc1
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
dma-mapping updates for Linux 6.10
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
The usual shower of singleton fixes and minor series all over 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
- Core Frameworks
2024-05-22 10:49:54 -07:00
module
Driver core changes for 6.10-rc1
2024-05-22 12:13:40 -07:00
power
getting rid of bogus set_blocksize() uses, switching it
2024-05-21 08:34:51 -07:00
printk
TTY/Serial changes for 6.10-rc1
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
bitmap patches for 6.10
2024-05-21 15:29:01 -07:00
time
sysctl changes for v6.10-rc1
2024-05-17 17:31:24 -07:00
trace
tracing: Minor last minute fixes
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
cgroup: Changes for v6.10
2024-05-15 17:06:08 -07:00
crash_core.c
Mainly singleton patches, documented in their respective changelogs.
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
virtio: features, fixes, cleanups
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
Linux 6.7-rc6
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
Quite a lot of kexec work this time around. Many singleton patches in
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
sysctl changes for v6.10-rc1
2024-05-17 17:31:24 -07:00
signal.c
virtio: features, fixes, cleanups
2024-05-23 12:04:36 -07:00
smp.c
CSD lock commits for v6.7
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
sysctl changes for v6.10-rc1
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
RISC-V Patches for the 6.10 Merge Window, Part 1
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
sysctl changes for v6.10-rc1
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
…
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
…
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_perf.c
kernel/watchdog_perf.c: tidy up kerneldoc
2024-05-08 08:41:29 -07:00
watchdog.c
Mainly singleton patches, documented in their respective changelogs.
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