Steven Rostedt (VMware) 56d3793229 tracing: Fix very unlikely race of registering two stat tracers ... [ Upstream commit dfb6cd1e65 ] Looking through old emails in my INBOX, I came across a patch from Luis Henriques that attempted to fix a race of two stat tracers registering the same stat trace (extremely unlikely, as this is done in the kernel, and probably doesn't even exist). The submitted patch wasn't quite right as it needed to deal with clean up a bit better (if two stat tracers were the same, it would have the same files). But to make the code cleaner, all we needed to do is to keep the all_stat_sessions_mutex held for most of the registering function. Link: http://lkml.kernel.org/r/1410299375-20068-1-git-send-email-luis.henriques@canonical.com Fixes: 002bb86d8d ("tracing/ftrace: separate events tracing and stats tracing engine") Reported-by: Luis Henriques <luis.henriques@canonical.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-02-24 08:34:39 +01:00
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bpf	bpf, offload: Unlock on error in bpf_offload_dev_create()	2020-01-27 14:51:20 +01:00
cgroup	cgroup: Prevent double killing of css when enabling threaded cgroup	2020-02-05 14:43:39 +00:00
configs
debug	kdb: do a sanity check on the cpu in kdb_per_cpu()	2020-01-27 14:50:48 +01:00
dma	dma-debug: add a schedule point in debug_dma_dump_mappings()	2020-01-04 19:12:43 +01:00
events	perf/core: Fix mlock accounting in perf_mmap()	2020-02-11 04:34:19 -08:00
gcov
irq	x86/apic/msi: Plug non-maskable MSI affinity race	2020-02-11 04:34:18 -08:00
livepatch	livepatch: Nullify obj->mod in klp_module_coming()'s error path	2019-10-07 18:57:10 +02:00
locking	locking/spinlock/debug: Fix various data races	2020-01-12 12:17:05 +01:00
power	PM / hibernate: memory_bm_find_bit(): Tighten node optimisation	2020-01-09 10:18:58 +01:00
printk	printk: fix exclusive_console replaying	2020-02-11 04:33:51 -08:00
rcu	rcu: Avoid data-race in rcu_gp_fqs_check_wake()	2020-02-11 04:33:55 -08:00
sched	sched/fair: Fix insertion in rq->leaf_cfs_rq_list	2020-02-01 09:37:10 +00:00
time	clocksource: Prevent double add_timer_on() for watchdog_timer	2020-02-11 04:34:18 -08:00
trace	tracing: Fix very unlikely race of registering two stat tracers	2020-02-24 08:34:39 +01:00
.gitignore
acct.c	acct_on(): don't mess with freeze protection	2019-05-31 06:46:05 -07:00
async.c
audit_fsnotify.c
audit_tree.c	audit: Embed key into chunk	2019-12-13 08:51:11 +01:00
audit_watch.c	audit_get_nd(): don't unlock parent too early	2019-12-13 08:51:02 +01:00
audit.c
audit.h
auditfilter.c	audit: fix a memory leak bug	2019-05-31 06:46:17 -07:00
auditsc.c	audit: print empty EXECVE args	2019-12-01 09:17:17 +01:00
backtracetest.c
bounds.c
capability.c	LSM: generalize flag passing to security_capable	2020-01-23 08:21:29 +01:00
compat.c
configs.c
context_tracking.c
cpu_pm.c
cpu.c	cpu/hotplug, stop_machine: Fix stop_machine vs hotplug order	2020-02-24 08:34:35 +01:00
crash_core.c
crash_dump.c
cred.c	memcg: account security cred as well to kmemcg	2020-01-09 10:19:00 +01:00
delayacct.c
dma.c
elfcore.c	kernel/elfcore.c: include proper prototypes	2019-10-11 18:21:23 +02:00
exec_domain.c
exit.c	exit: panic before exit_mm() on global init exit	2020-01-09 10:19:02 +01:00
extable.c
fail_function.c
fork.c	fork,memcg: alloc_thread_stack_node needs to set tsk->stack	2020-01-27 14:50:58 +01:00
freezer.c
futex.c	futex: Prevent robust futex exit race	2019-12-01 09:17:38 +01:00
groups.c
hung_task.c
iomem.c
irq_work.c	irq_work: Do not raise an IPI when queueing work on the local CPU	2019-05-31 06:46:19 -07:00
jump_label.c	jump_label: move 'asm goto' support test to Kconfig	2019-06-04 08:02:34 +02:00
kallsyms.c	kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol	2019-09-21 07:17:02 +02:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c
kexec_core.c	kexec: Allocate decrypted control pages for kdump if SME is enabled	2019-11-24 08:20:29 +01:00
kexec_file.c
kexec_internal.h
kexec.c
kmod.c
kprobes.c	kprobes: Blacklist symbols in arch-defined prohibited area	2019-12-05 09:20:26 +01:00
ksysfs.c
kthread.c
latencytop.c
Makefile	y2038: futex: Move compat implementation into futex.c	2019-12-01 09:17:38 +01:00
memremap.c	mm/memory_hotplug: shrink zones when offlining memory	2020-01-29 16:43:27 +01:00
module_signing.c
module-internal.h
module.c	kernel/module: Fix memleak in module_add_modinfo_attrs()	2020-02-11 04:33:50 -08:00
notifier.c
nsproxy.c
padata.c	padata: fix null pointer deref of pd->pinst	2020-02-14 16:33:28 -05:00
panic.c	kernel/panic.c: do not append newline to the stack protector panic string	2019-12-01 09:17:10 +01:00
params.c
pid_namespace.c	signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig	2019-07-26 09:14:01 +02:00
pid.c
profile.c
ptrace.c	ptrace: reintroduce usage of subjective credentials in ptrace_has_cap()	2020-01-23 08:21:29 +01:00
range.c
reboot.c
relay.c
resource.c	resource: fix locking in find_next_iomem_res()	2019-09-16 08:22:20 +02:00
rseq.c
seccomp.c	LSM: generalize flag passing to security_capable	2020-01-23 08:21:29 +01:00
signal.c	signal: Allow cifs and drbd to receive their terminating signals	2020-01-27 14:51:05 +01:00
smp.c
smpboot.c
smpboot.h
softirq.c
stacktrace.c
stop_machine.c
sys_ni.c
sys.c	kernel/sys.c: prctl: fix false positive in validate_prctl_map()	2019-06-15 11:54:01 +02:00
sysctl_binary.c
sysctl.c	kernel: sysctl: make drop_caches write-only	2020-01-04 19:13:17 +01:00
task_work.c
taskstats.c	taskstats: fix data-race	2020-01-09 10:18:59 +01:00
test_kprobes.c
torture.c
tracepoint.c
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c
up.c
user_namespace.c
user-return-notifier.c
user.c
utsname_sysctl.c
utsname.c
watchdog_hld.c
watchdog.c
workqueue_internal.h
workqueue.c	workqueue: Fix missing kfree(rescuer) in destroy_workqueue()	2019-12-17 20:35:50 +01:00