Peter Zijlstra 467131dbaa perf: Tighten (and fix) the grouping condition ... commit c3c87e770458aa004bd7ed3f29945ff436fd6511 upstream. The fix from 9fc81d87420d ("perf: Fix events installation during moving group") was incomplete in that it failed to recognise that creating a group with events for different CPUs is semantically broken -- they cannot be co-scheduled. Furthermore, it leads to real breakage where, when we create an event for CPU Y and then migrate it to form a group on CPU X, the code gets confused where the counter is programmed -- triggered in practice as well by me via the perf fuzzer. Fix this by tightening the rules for creating groups. Only allow grouping of counters that can be co-scheduled in the same context. This means for the same task and/or the same cpu. Fixes: 9fc81d87420d ("perf: Fix events installation during moving group") Bug: 34515362 Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20150123125834.090683288@infradead.org Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Willy Tarreau <w@1wt.eu> Change-Id: I72247f51388177f172845ccd4621debcd3158940		2017-03-15 21:06:11 -07:00
..
cpu	idle: Implement a per-cpu idle-polling mode	2014-11-12 22:49:15 -08:00
debug	This is the 3.10.73 stable release	2015-05-01 13:49:45 -07:00
events	perf: Tighten (and fix) the grouping condition	2017-03-15 21:06:11 -07:00
gcov
irq	irq: pm: Remove unused variable	2015-06-18 15:22:07 -07:00
power	wakeup_reason: use vsnprintf instead of snprintf for vargs.	2015-08-06 17:37:35 +00:00
sched	sched: fix task-priority when using SCHED_RESET_ON_FORK	2016-09-21 14:17:26 -07:00
time	This is the 3.10.73 stable release	2015-05-01 13:49:45 -07:00
trace	tracing: do not leak kernel addresses	2017-03-15 21:06:10 -07:00
.gitignore
acct.c
async.c
audit.c	CAPABILITIES: remove undefined caps from all processes	2014-09-17 09:03:57 -07:00
audit.h	audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record	2013-12-04 10:57:03 -08:00
audit_tree.c	audit: keep inode pinned	2014-11-21 09:22:52 -08:00
audit_watch.c
auditfilter.c	audit: Fix compilation issue	2013-09-10 22:37:36 -06:00
auditsc.c	auditsc: audit_krule mask accesses need bounds checking	2014-06-16 13:42:53 -07:00
backtracetest.c
bounds.c
capability.c	CAPABILITIES: remove undefined caps from all processes	2014-09-17 09:03:57 -07:00
cgroup.c	cgroup: prefer %pK to %p	2016-09-17 15:24:09 +00:00
cgroup_freezer.c
compat.c
configs.c
context_tracking.c	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-06-20 08:18:35 -10:00
cpu.c	cpu: send KOBJ_ONLINE event when enabling cpus	2016-06-14 17:56:44 -07:00
cpu_pm.c	cpu_pm: Add level to the cluster pm notification	2015-01-07 22:31:58 -08:00
cpuset.c	kernel: cpuset: Make cpusets restore on hotplug	2015-06-19 20:29:32 +00:00
crash_dump.c
cred.c
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	Revert "android/lowmemorykiller: Ignore tasks with freed mm"	2015-12-30 10:33:33 -08:00
extable.c
fork.c	Introducing per-task/per-process cpufreq statistics.	2016-03-03 13:50:04 -08:00
freezer.c	This is the 3.10.67 stable release	2015-05-01 13:34:57 -07:00
futex.c	Merge upstream tag 'v3.10.49' into msm-3.10	2014-08-20 13:23:09 -07:00
futex_compat.c
groups.c	userns: Don't allow setgroups until a gid mapping has been setablished	2015-01-08 09:58:16 -08:00
hrtimer.c	hrtimer: Prevent stale expiry time in hrtimer_interrupt()	2015-02-13 04:20:48 -08:00
hung_task.c
irq_work.c	irq_work: register irq_work_cpu_notify in early init	2014-12-22 14:30:12 +05:30
itimer.c
jump_label.c
kallsyms.c
kcmp.c	kcmp: fix standard comparison bug	2014-10-05 14:54:13 -07:00
Kconfig.freezer
Kconfig.hz	kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS	2014-02-07 15:55:40 -08:00
Kconfig.locks	printk: Make the console flush configurable in hotplug path	2014-11-18 19:16:25 -07:00
Kconfig.preempt
kexec.c	PCI: Disable Bus Master only on kexec reboot	2013-12-20 07:45:08 -08:00
kmod.c	arch: Mass conversion of smp_mb__*()	2014-08-15 11:45:28 -07:00
kprobes.c
ksysfs.c
kthread.c	kthread: Fix the race condition when kthread is parked	2015-06-16 18:19:35 -07:00
latencytop.c
lglock.c
lockdep.c	lockdep: remove task argument from debug_check_no_locks_held	2013-07-01 15:38:03 -07:00
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
Makefile	UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing	2016-03-02 10:26:42 -08:00
modsign_pubkey.c
module-internal.h	UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing	2016-03-02 10:26:42 -08:00
module.c	This is the 3.10.67 stable release	2015-05-01 13:34:57 -07:00
module_signing.c	UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing	2016-03-02 10:26:42 -08:00
mutex-debug.c
mutex-debug.h
mutex.c	mutex: Add a delay into the SPIN_ON_OWNER wait loop.	2015-08-11 23:01:35 +00:00
mutex.h
notifier.c
nsproxy.c
padata.c
panic.c	panic: resume console if panic after console suspend.	2015-09-14 10:22:45 -07:00
params.c
pid.c	This is the 3.10.67 stable release	2015-05-01 13:34:57 -07:00
pid_namespace.c	pid_namespace: pidns_get() should check task_active_pid_ns() != NULL	2014-04-26 17:15:34 -07:00
posix-cpu-timers.c
posix-timers.c	posix-timers: Fix stack info leak in timer_create()	2014-11-14 08:48:00 -08:00
printk.c	panic: resume console if panic after console suspend.	2015-09-14 10:22:45 -07:00
profile.c	profile: Fix CPU hotplug callback registration	2014-07-01 13:52:28 -07:00
ptrace.c	__ptrace_may_access() should not deny sub-threads	2016-02-04 08:04:22 -08:00
range.c	range: Do not add new blank slot with add_range_with_merge	2013-06-18 11:32:10 -05:00
rcu.h
rcupdate.c
rcutiny.c
rcutiny_plugin.h
rcutorture.c
rcutree.c	Revert "rcu: Make RCU_FAST_NO_HZ take advantage of numbered callbacks"	2015-09-09 10:40:34 -07:00
rcutree.h	Revert "rcu: Make RCU_FAST_NO_HZ take advantage of numbered callbacks"	2015-09-09 10:40:34 -07:00
rcutree_plugin.h	Revert "rcu: Make RCU_FAST_NO_HZ take advantage of numbered callbacks"	2015-09-09 10:40:34 -07:00
rcutree_trace.c	Revert "rcu: Make RCU_FAST_NO_HZ take advantage of numbered callbacks"	2015-09-09 10:40:34 -07:00
relay.c
res_counter.c
resource.c	kernel: Restrict permissions of /proc/iomem.	2015-02-09 16:17:30 -08:00
rtmutex-debug.c
rtmutex-debug.h	rtmutex: Handle deadlock detection smarter	2014-07-17 15:58:04 -07:00
rtmutex-tester.c
rtmutex.c	rtmutex: Plug slow unlock race	2014-07-17 15:58:04 -07:00
rtmutex.h	rtmutex: Handle deadlock detection smarter	2014-07-17 15:58:04 -07:00
rtmutex_common.h
rwsem.c
seccomp.c	seccomp,x86,arm,mips,s390: Remove nr parameter from secure_computing	2015-07-08 21:05:50 -07:00
semaphore.c
signal.c	constify copy_siginfo_to_user{,32}()	2014-02-07 15:55:38 -08:00
smp.c	This is the 3.10.67 stable release	2015-05-01 13:34:57 -07:00
smpboot.c	smpboot: Add missing get_online_cpus() in smpboot_register_percpu_thread()	2015-02-11 14:48:17 +08:00
smpboot.h
softirq.c	UPSTREAM: sched: Introduce preempt_count accessor functions	2016-07-22 15:44:15 -07:00
spinlock.c
srcu.c
stacktrace.c	debugging: keep track of page owners	2014-03-28 13:33:08 -07:00
stop_machine.c
sys.c	sched: move no_new_privs into new atomic flags	2015-07-08 21:05:42 -07:00
sys_ni.c	seccomp: add "seccomp" syscall	2015-07-08 21:05:41 -07:00
sysctl.c	FROMLIST: mm: mmap: Add new /proc tunable for mmap_base ASLR.	2016-01-14 11:58:47 -08:00
sysctl_binary.c	sysctl: add cold_boot sysctl entry	2013-09-05 14:51:16 -07:00
system_certificates.S	UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing	2016-03-02 10:26:42 -08:00
system_keyring.c	UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing	2016-03-02 10:26:42 -08:00
task_work.c
taskstats.c
test_kprobes.c
time.c	time: settimeofday: Validate the values of tv from user	2015-01-29 17:40:56 -08:00
timeconst.bc
timer.c	UPSTREAM: sched: Introduce preempt_count accessor functions	2016-07-22 15:44:15 -07:00
tracepoint.c	tracepoint: Do not waste memory on mods with no tracepoints	2014-05-30 21:52:11 -07:00
tsacct.c
uid16.c	groups: Consolidate the setgroups permission checks	2015-01-08 09:58:16 -08:00
up.c
user-return-notifier.c
user.c	userns: Add a knob to disable setgroups on a per user namespace basis	2015-01-08 09:58:16 -08:00
user_namespace.c	userns: Allow setting gid_maps without privilege when setgroups is disabled	2015-01-08 09:58:17 -08:00
utsname.c
utsname_sysctl.c
wait.c	sched: add bit_wait_io for 3.18 ext4 backport	2015-06-11 16:54:34 -04:00
watchdog.c	hardlockup: detect hard lockups without NMIs using secondary cpus	2013-07-01 14:16:17 -07:00
workqueue.c	This is the 3.10.73 stable release	2015-05-01 13:49:45 -07:00
workqueue_internal.h