Prasad Sodagudi 4e38f843b6 genirq: Avoid race between cpu hot plug and irq_desc() allocation paths ... One of the core might have just allocated irq_desc() and other core might be doing irq migration in the hot plug path. In the hot plug path during the IRQ migration, for_each_active_irq macro is trying to get irqs whose bits are set in allocated_irqs bit map but there is no return value check after irq_to_desc for desc validity. [ 24.566381] msm_thermal:do_core_control Set Offline: CPU4 Temp: 73 [ 24.568821] Unable to handle kernel NULL pointer dereference at virtual address 000000a4 [ 24.568931] pgd = ffffffc002184000 [ 24.568995] [000000a4] *pgd=0000000178df5003, *pud=0000000178df5003, *pmd=0000000178df6003, *pte=0060000017a00707 [ 24.569153] ------------[ cut here ]------------ [ 24.569228] Kernel BUG at ffffffc0000f3060 [verbose debug info unavailable] [ 24.569334] Internal error: Oops - BUG: 96000005 [#1] PREEMPT SMP [ 24.569422] Modules linked in: [ 24.569486] CPU: 4 PID: 28 Comm: migration/4 Tainted: G W 4.4.8-perf-9407222-eng #1 [ 24.569684] task: ffffffc0f28f0e80 ti: ffffffc0f2a84000 task.ti: ffffffc0f2a84000 [ 24.569785] PC is at do_raw_spin_lock+0x20/0x160 [ 24.569859] LR is at _raw_spin_lock+0x34/0x40 [ 24.569931] pc : [<ffffffc0000f3060>] lr : [<ffffffc001023dec>] pstate: 200001c5 [ 24.570029] sp : ffffffc0f2a87bc0 [ 24.570091] x29: ffffffc0f2a87bc0 x28: ffffffc001033988 [ 24.570174] x27: ffffffc001adebb0 x26: 0000000000000000 [ 24.570257] x25: 00000000000000a0 x24: 0000000000000020 [ 24.570339] x23: ffffffc001033978 x22: ffffffc001adeb80 [ 24.570421] x21: 000000000000027e x20: 0000000000000000 [ 24.570502] x19: 00000000000000a0 x18: 000000000000000d [ 24.570584] x17: 0000000000005f00 x16: 0000000000000003 [ 24.570666] x15: 000000000000bd39 x14: 0ffffffffffffffe [ 24.570748] x13: 0000000000000000 x12: 0000000000000018 [ 24.570829] x11: 0101010101010101 x10: 7f7f7f7f7f7f7f7f [ 24.570911] x9 : fefefefeff332e6d x8 : 7f7f7f7f7f7f7f7f [ 24.570993] x7 : ffffffc00344f6a0 x6 : 0000000000000000 [ 24.571075] x5 : 0000000000000001 x4 : ffffffc00344f488 [ 24.571157] x3 : 0000000000000000 x2 : 0000000000000000 [ 24.571238] x1 : ffffffc0f2a84000 x0 : 0000000000004ead ... ... ... [ 24.581324] Call trace: [ 24.581379] [<ffffffc0000f3060>] do_raw_spin_lock+0x20/0x160 [ 24.581463] [<ffffffc001023dec>] _raw_spin_lock+0x34/0x40 [ 24.581546] [<ffffffc000103f10>] irq_migrate_all_off_this_cpu+0x84/0x1c4 [ 24.581641] [<ffffffc00008ec84>] __cpu_disable+0x54/0x74 [ 24.581722] [<ffffffc0000a3368>] take_cpu_down+0x1c/0x58 [ 24.581803] [<ffffffc00013ac08>] multi_cpu_stop+0xb0/0x10c [ 24.581885] [<ffffffc00013ad60>] cpu_stopper_thread+0xb8/0x184 [ 24.581972] [<ffffffc0000c4920>] smpboot_thread_fn+0x26c/0x290 [ 24.582057] [<ffffffc0000c0f84>] kthread+0x100/0x108 [ 24.582135] Code: aa0003f3 aa1e03e0 d503201f 5289d5a0 (b9400661) [ 24.582224] ---[ end trace 609f38584306f5d9 ]--- CRs-Fixed: 1074611 Change-Id: I6cc5399e511b6d62ec7fbc4cac21f4f41023520e Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org> Signed-off-by: Trilok Soni <tsoni@codeaurora.org> Signed-off-by: Runmin Wang <runminw@codeaurora.org>		2016-10-07 13:07:10 -07:00
..
arch/arm	input: touchscreen: Add synaptics v1 driver	2016-07-25 11:23:29 +05:30
bpf	Revert "Merge remote-tracking branch 'msm-4.4/tmp-510d0a3f' into msm-4.4"	2016-08-26 14:34:05 -07:00
configs
debug	Merge remote-tracking branch 'origin/tmp-917a9a9133a6' into lsk	2016-07-12 11:40:49 -07:00
Documentation/firmware_updater	input: touchscreen: Add synaptics v1 driver	2016-07-25 11:23:29 +05:30
drivers/input/touchscreen	input: msg21xx_ts: Move the driver to proper path	2016-08-01 02:52:55 -07:00
events	perf: Add cpu isolation awareness	2016-09-24 10:59:59 -07:00
gcov
include/linux/input	input: touchscreen: Add synaptics v1 driver	2016-07-25 11:23:29 +05:30
irq	genirq: Avoid race between cpu hot plug and irq_desc() allocation paths	2016-10-07 13:07:10 -07:00
livepatch
locking	Merge "RFC: FROMLIST: cgroup: reduce read locked section of cgroup_threadgroup_rwsem during fork"	2016-10-05 19:29:13 -07:00
power	pmqos: Enable cpu isolation awareness	2016-09-24 10:59:57 -07:00
printk	printk: Add all cpu notifiers under CONSOLE_FLUSH_ON_HOTPLUG flag	2016-03-23 21:11:59 -07:00
rcu	RFC: FROMLIST: cgroup: avoid synchronize_sched() in __cgroup_procs_write()	2016-08-29 14:18:07 -07:00
sched	Merge "sched/tune: add sysctl interface to define a boost value"	2016-10-06 19:45:49 -07:00
time	hrtimer: Ensure timer is not running before migrating	2016-09-30 17:04:11 -07:00
trace	core_ctl_helper: Remove code since it is not used anymore	2016-09-24 11:00:02 -07:00
.gitignore
acct.c
async.c
audit.c
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
cgroup.c	Merge "RFC: FROMLIST: cgroup: reduce read locked section of cgroup_threadgroup_rwsem during fork"	2016-10-05 19:29:13 -07:00
cgroup_freezer.c
cgroup_pids.c
compat.c
configs.c
context_tracking.c
cpu.c	cpumask: Add cpu isolation support	2016-09-20 17:47:13 -07:00
cpu_pm.c	lpm-levels: Do not disable non-sec interrupts in suspend	2016-03-22 11:07:22 -07:00
cpuset.c	cpuset: handle race between CPU hotplug and cpuset_hotplug_work	2016-09-13 10:32:11 -07:00
crash_dump.c
cred.c
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	android/lowmemorykiller: Ignore tasks with freed mm	2016-04-13 11:09:29 -07:00
extable.c
fork.c	RFC: FROMLIST: cgroup: reduce read locked section of cgroup_threadgroup_rwsem during fork	2016-08-29 14:19:13 -07:00
freezer.c
futex.c	Revert "Merge remote-tracking branch 'msm-4.4/tmp-510d0a3f' into msm-4.4"	2016-08-26 14:34:05 -07:00
futex_compat.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-02-25 12:01:16 -08:00
groups.c
hung_task.c
irq_work.c
jump_label.c
kallsyms.c
kcmp.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-02-25 12:01:16 -08:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c
kexec_core.c
kexec_file.c
kexec_internal.h
kmod.c
kprobes.c
ksysfs.c
kthread.c
latencytop.c
Makefile
membarrier.c
memremap.c	devm_memremap: Fix error value when memremap failed	2016-03-03 15:07:08 -08:00
module-internal.h
module.c	Merge remote-tracking branch 'origin/tmp-917a9a9133a6' into lsk	2016-07-12 11:40:49 -07:00
module_signing.c
notifier.c
nsproxy.c
padata.c
panic.c	coresight: abort coresight tracing on kernel crash	2016-08-19 14:56:53 -07:00
params.c
pid.c
pid_namespace.c
profile.c
ptrace.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-02-25 12:01:16 -08:00
range.c
reboot.c
relay.c
resource.c	Merge remote-tracking branch 'origin/tmp-917a9a9133a6' into lsk	2016-07-12 11:40:49 -07:00
seccomp.c	seccomp: always propagate NO_NEW_PRIVS on tsync	2016-03-03 15:07:25 -08:00
signal.c
smp.c	smp: Do not wake up all idle CPUs	2016-09-24 10:59:58 -07:00
smpboot.c	smpboot: use kmemleak_not_leak for smpboot_thread_data	2016-03-23 21:23:42 -07:00
smpboot.h
softirq.c
stacktrace.c
stop_machine.c
sys.c	Merge remote-tracking branch 'lsk-44/linux-linaro-lsk-v4.4' into 44rc2	2016-03-23 20:51:00 -07:00
sys_ni.c
sysctl.c	sched/tune: add sysctl interface to define a boost value	2016-10-05 17:24:23 -07:00
sysctl_binary.c	Merge remote-tracking branch 'msm-4.4/tmp-2bf7955' into msm-4.4	2016-07-22 16:45:32 -07:00
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c
tsacct.c
uid16.c
up.c
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
watchdog.c	watchdog: Add support for cpu isolation	2016-09-20 17:47:13 -07:00
workqueue.c	Revert "Merge remote-tracking branch 'msm-4.4/tmp-510d0a3f' into msm-4.4"	2016-08-26 14:34:05 -07:00
workqueue_internal.h