Peter Zijlstra 40ba03f35b perf: Fix fasync handling on inherited events ... commit fed66e2cdd4f127a43fd11b8d92a99bdd429528c upstream. Vince reported that the fasync signal stuff doesn't work proper for inherited events. So fix that. Installing fasync allocates memory and sets filp->f_flags |= FASYNC, which upon the demise of the file descriptor ensures the allocation is freed and state is updated. Now for perf, we can have the events stick around for a while after the original FD is dead because of references from child events. So we cannot copy the fasync pointer around. We can however consistently use the parent's fasync, as that will be updated. Reported-and-Tested-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho deMelo <acme@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: eranian@google.com Link: http://lkml.kernel.org/r/1434011521.1495.71.camel@twins Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Zefan Li <lizefan@huawei.com>		2016-03-21 09:17:51 +08:00
..
debug	kdb: fix incorrect counts in KDB summary command output	2015-06-19 11:40:17 +08:00
events	perf: Fix fasync handling on inherited events	2016-03-21 09:17:51 +08:00
gcov
irq	genirq: Prevent proc race against freeing of irq descriptors	2015-04-14 17:33:46 +08:00
power	PM / Sleep: fix recovery during resuming from hibernation	2015-02-02 17:05:05 +08:00
sched	sched: Queue RT tasks to head when prio drops	2015-09-18 09:20:47 +08:00
time	ntp: Fixup adjtimex freq validation on 32-bit systems	2015-04-14 17:34:04 +08:00
trace	tracing/filter: Do not allow infix to exceed end of string	2015-10-22 09:20:06 +08:00
.gitignore
acct.c	Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2012-01-08 12:19:57 -08:00
async.c	Fix a dead loop in async_synchronize_full()	2012-10-02 10:30:35 -07:00
audit.c	audit: wait_for_auditd() should use TASK_UNINTERRUPTIBLE	2014-04-14 06:44:15 -07:00
audit.h	audit: remove AUDIT_SETUP_CONTEXT as it isn't used	2012-01-17 16:16:57 -05:00
audit_tree.c	audit: keep inode pinned	2015-02-02 17:05:19 +08:00
audit_watch.c
auditfilter.c	audit: allow interfield comparison in audit rules	2012-01-17 16:17:01 -05:00
auditsc.c	auditsc: audit_krule mask accesses need bounds checking	2014-06-16 13:45:46 -07:00
backtracetest.c
bounds.c
capability.c	Revert "capabitlies: ns_capable can use the cap helpers rather than lsm call"	2012-01-17 10:19:41 -08:00
cgroup.c	move d_rcu from overlapping d_child to overlapping d_alias	2015-04-14 17:33:58 +08:00
cgroup_freezer.c	cgroup: cgroup_subsys->fork() should be called after the task is added to css_set	2014-03-11 16:10:03 -07:00
compat.c	compat: Fix RT signal mask corruption via sigprocmask	2012-05-10 08:58:33 -07:00
configs.c
cpu.c	sched: Fix hotplug vs. set_cpus_allowed_ptr()	2014-06-11 12:04:11 -07:00
cpu_pm.c
cpuset.c	cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags	2014-12-01 18:02:38 +08:00
crash_dump.c
cred.c	cred: copy_process() should clear child->replacement_session_keyring	2012-04-11 08:20:11 -07:00
delayacct.c
dma.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
elfcore.c
exec_domain.c
exit.c	introduce for_each_thread() to replace the buggy while_each_thread()	2015-02-02 17:04:55 +08:00
extable.c
fork.c	introduce for_each_thread() to replace the buggy while_each_thread()	2015-02-02 17:04:55 +08:00
freezer.c	freezer: Do not freeze tasks killed by OOM killer	2015-02-02 17:04:54 +08:00
futex.c	futex: Fix a race condition between REQUEUE_PI and task death	2015-02-02 17:05:05 +08:00
futex_compat.c	futex: Revert "futex: Mark get_robust_list as deprecated"	2013-02-28 06:59:01 -08:00
groups.c
hrtimer.c	hrtimer: Allow concurrent hrtimer_start() for self restarting timers	2015-10-22 09:20:01 +08:00
hung_task.c	hung_task: fix the broken rcu_lock_break() logic	2012-03-05 15:49:42 -08:00
irq_work.c	irq_work: fix compile failure on tile from missing include	2012-04-13 13:15:16 -04:00
itimer.c	itimer: Use printk_once instead of WARN_ONCE	2012-04-10 11:00:30 +02:00
jump_label.c	static keys: Inline the static_key_enabled() function	2012-02-28 20:01:08 +01:00
kallsyms.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks	locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage	2012-03-23 13:18:57 +01:00
Kconfig.preempt	locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage	2012-03-23 13:18:57 +01:00
kexec.c	Merge branch 'akpm' (Andrew's patch-bomb)	2012-03-28 17:19:28 -07:00
kfifo.c
kmod.c	usermodehelper: check subprocess_info->path != NULL	2013-05-19 10:54:50 -07:00
kprobes.c	kprobes: return proper error code from register_kprobe()	2012-03-05 15:49:42 -08:00
ksysfs.c
kthread.c	kthread_worker: reimplement flush_kthread_work() to allow freeing the work item being executed	2012-10-02 10:30:40 -07:00
latencytop.c
lockdep.c	lockdep: Add CPU-idle/offline warning to lockdep-RCU splat	2012-02-21 09:06:06 -08:00
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
Makefile	sysctl: Move the implementation into fs/proc/proc_sysctl.c	2012-01-24 16:37:54 -08:00
module.c	ftrace/module: Hardcode ftrace_module_init() call into load_module()	2014-06-07 16:02:00 -07:00
mutex-debug.c
mutex-debug.h
mutex.c	sched/rt: Use schedule_preempt_disabled()	2012-03-01 10:28:03 +01:00
mutex.h
notifier.c
nsproxy.c
padata.c	padata: Fix cpu hotplug	2012-03-29 19:52:46 +08:00
panic.c	panic: fix a possible deadlock in panic()	2013-04-12 09:38:47 -07:00
params.c	params: <level>_initcall-like kernel parameters	2012-03-26 12:50:51 +10:30
pid.c	vfs: fix panic in __d_lookup() with high dentry hashtable counts	2012-02-13 20:45:38 -05:00
pid_namespace.c	pidns: add reboot_pid_ns() to handle the reboot syscall	2012-03-28 17:14:36 -07:00
posix-cpu-timers.c	posix-cpu-timers: Fix nanosleep task_struct leak	2013-02-28 06:58:59 -08:00
posix-timers.c	posix-timers: Fix stack info leak in timer_create()	2015-02-02 17:05:05 +08:00
printk.c	console: Fix console name size mismatch	2015-06-19 11:40:22 +08:00
profile.c
ptrace.c	ptrace: fix race between ptrace_resume() and wait_task_stopped()	2015-09-18 09:20:31 +08:00
range.c
rcu.h	rcu: Allow nesting of rcu_idle_enter() and rcu_idle_exit()	2012-02-21 09:06:12 -08:00
rcupdate.c	rcu: Check for illegal use of RCU from offlined CPUs	2012-02-21 09:06:03 -08:00
rcutiny.c	rcu: Correctly handle non-empty Tiny RCU callback list with none ready	2015-10-22 09:20:02 +08:00
rcutiny_plugin.h	rcu: Simplify unboosting checks	2012-02-21 09:03:43 -08:00
rcutorture.c	PTR_ERR should be called before its argument is cleared.	2012-02-21 09:06:10 -08:00
rcutree.c	rcu: Fix batch-limit size problem	2012-12-17 10:37:46 -08:00
rcutree.h	rcu: Rework detection of use of RCU by offline CPUs	2012-02-21 09:06:07 -08:00
rcutree_plugin.h	rcu: Hold off RCU_FAST_NO_HZ after timer posted	2012-02-21 09:42:30 -08:00
rcutree_trace.c	rcu: Rework detection of use of RCU by offline CPUs	2012-02-21 09:06:07 -08:00
relay.c	splice: fix racy pipe->buffers uses	2012-07-16 09:04:42 -07:00
res_counter.c	net: introduce res_counter_charge_nofail() for socket allocations	2012-01-22 15:08:46 -05:00
resource.c	kernel/resource.c: fix stack overflow in __reserve_region_with_split()	2013-02-14 10:48:53 -08:00
rtmutex-debug.c
rtmutex-debug.h	rtmutex: Handle deadlock detection smarter	2014-07-17 15:39:50 -07:00
rtmutex-tester.c
rtmutex.c	rtmutex: Plug slow unlock race	2014-07-17 15:39:50 -07:00
rtmutex.h	rtmutex: Handle deadlock detection smarter	2014-07-17 15:39:50 -07:00
rtmutex_common.h
rwsem.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
seccomp.c	seccomp: audit abnormal end to a process due to seccomp	2012-01-17 16:16:55 -05:00
semaphore.c
signal.c	kernel/signal.c: stop info leak via the tkill and the tgkill syscalls	2013-04-25 21:19:54 -07:00
smp.c	smp: Fix SMP function call empty cpu mask race	2013-02-03 18:24:42 -06:00
softirq.c	Fix lockup related to stop_machine being stuck in __do_softirq.	2015-06-19 11:40:32 +08:00
spinlock.c	locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage	2012-03-23 13:18:57 +01:00
srcu.c	rcu: Call out dangers of expedited RCU primitives	2012-02-21 09:06:08 -08:00
stacktrace.c
stop_machine.c
sys.c	reboot: rigrate shutdown/reboot to boot cpu	2013-06-20 11:58:45 -07:00
sys_ni.c
sysctl.c	hung_task: check the value of "sysctl_hung_task_timeout_sec"	2014-05-06 07:51:45 -07:00
sysctl_binary.c	sysctl: fix null checking in bin_dn_node_address()	2013-03-04 06:06:41 +08:00
taskstats.c
test_kprobes.c
time.c	time: settimeofday: Validate the values of tv from user	2015-04-14 17:33:50 +08:00
timeconst.pl	timeconst.pl: Eliminate Perl warning	2013-02-28 06:58:58 -08:00
timer.c	timer: Prevent overflow in apply_slack	2014-06-07 16:02:00 -07:00
tracepoint.c	tracepoint: Do not waste memory on mods with no tracepoints	2014-05-18 05:25:56 -07:00
tsacct.c
uid16.c
up.c
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
wait.c
watchdog.c	watchdog: using u64 in get_sample_period()	2012-12-03 11:47:17 -08:00
workqueue.c	workqueue: cond_resched() after processing each work item	2014-04-14 06:44:16 -07:00
workqueue_sched.h