Thomas Gleixner 7b4eaec694 genirq: Prevent chip buslock deadlock ... commit abc7e40c81d113ef4bacb556f0a77ca63ac81d85 upstream. If a interrupt chip utilizes chip->buslock then free_irq() can deadlock in the following way: CPU0 CPU1 interrupt(X) (Shared or spurious) free_irq(X) interrupt_thread(X) chip_bus_lock(X) irq_finalize_oneshot(X) chip_bus_lock(X) synchronize_irq(X) synchronize_irq() waits for the interrupt thread to complete, i.e. forever. Solution is simple: Drop chip_bus_lock() before calling synchronize_irq() as we do with the irq_desc lock. There is nothing to be protected after the point where irq_desc lock has been released. This adds chip_bus_lock/unlock() to the remove_irq() code path, but that's actually correct in the case where remove_irq() is called on such an interrupt. The current users of remove_irq() are not affected as none of those interrupts is on a chip which requires buslock. Reported-by: Fredrik Markström <fredrik.markstrom@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Zefan Li <lizefan@huawei.com>		2016-10-26 23:15:37 +08:00
..
debug	kdb: fix incorrect counts in KDB summary command output	2015-06-19 11:40:17 +08:00
events	perf: Fix inherited events vs. tracepoint filters	2016-10-26 23:15:28 +08:00
gcov
irq	genirq: Prevent chip buslock deadlock	2016-10-26 23:15:37 +08:00
power	PM / Sleep: fix recovery during resuming from hibernation	2015-02-02 17:05:05 +08:00
sched	sched/core: Clear the root_domain cpumasks in init_rootdomain()	2016-10-26 23:15:33 +08:00
time	clocksource: Fix abs() usage w/ 64bit values	2016-04-27 18:55:25 +08:00
trace	ring-buffer: Update read stamp with first real commit on page	2016-10-26 23:15:30 +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	fs: create and use seq_show_option for escaping	2016-04-27 18:55:18 +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	module: Fix locking in symbol_put_addr()	2016-04-27 18:55:19 +08:00
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	kernel/watchdog.c: touch_nmi_watchdog should only touch local cpu not every one	2016-03-21 09:17:57 +08:00
workqueue.c	workqueue: cond_resched() after processing each work item	2014-04-14 06:44:16 -07:00
workqueue_sched.h