Vasily Averin 831246570d kernel/notifier.c: double register detection ... By design notifiers can be registerd once only, 2nd register attempt called by mistake silently corrupts notifiers list. A few years ago I investigated described problem, the host was power cycled because of notifier list corruption. I've prepared this patch and applied it to the OpenVZ kernel and sent this patch but nobody commented on it. Later it helped us to detect a similar problem in the OpenVz kernel. Mistakes with notifier registration can happen for example during subsystem initialization from different namespaces, or because of a lost unregister in the roll-back path on initialization failures. The proposed check cannot prevent the described problem, however it allows us to detect its reason quickly without coredump analysis. Link: http://lkml.kernel.org/r/04127e71-4782-9bbb-fe5a-7c01e93a99b0@virtuozzo.com Signed-off-by: Vasily Averin <vvs@virtuozzo.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2019-05-14 19:52:49 -07:00
..
bpf	bpf: fix undefined behavior in narrow load handling	2019-05-13 02:05:50 +02:00
cgroup	kernel/sched/psi.c: expose pressure metrics on root cgroup	2019-05-14 19:52:48 -07:00
configs
debug	kdb: use bool for binary state indicators	2018-12-30 08:31:52 +00:00
dma	DMA mapping updates for 5.2	2019-05-09 08:40:55 -07:00
events	mm/mmu_notifier: use correct mmu_notifier events for each invalidation	2019-05-14 09:47:49 -07:00
gcov	kernel/gcov/gcc_3_4.c: use struct_size() in kzalloc()	2019-03-07 18:32:02 -08:00
irq	Driver core/kobject patches for 5.2-rc1	2019-05-07 13:01:40 -07:00
livepatch	Driver core/kobject patches for 5.2-rc1	2019-05-07 13:01:40 -07:00
locking	Remove Mysterious Macro Intended to Obscure Weird Behaviours (mmiowb())	2019-05-06 16:57:52 -07:00
power	Power management updates for 5.2-rc1	2019-05-06 19:40:31 -07:00
printk	fbdev changes for v5.1:	2019-03-15 14:22:59 -07:00
rcu	Printk changes for 5.2	2019-05-07 09:18:12 -07:00
sched	kernel/sched/psi.c: expose pressure metrics on root cgroup	2019-05-14 19:52:48 -07:00
time	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2019-05-07 22:03:58 -07:00
trace	This is the bulk of the GPIO changes for the v5.2 kernel cycle:	2019-05-11 10:54:43 -04:00
.gitignore	Provide in-kernel headers to make extending kernel easier	2019-04-29 16:48:03 +02:00
acct.c	acct_on(): don't mess with freeze protection	2019-04-04 21:04:13 -04:00
async.c	treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively	2019-04-09 14:19:06 +02:00
audit_fsnotify.c	audit_compare_dname_path(): switch to const struct qstr *	2019-04-28 20:33:43 -04:00
audit_tree.c	fsnotify: switch send_to_group() and ->handle_event to const struct qstr *	2019-04-26 13:51:03 -04:00
audit_watch.c	audit_compare_dname_path(): switch to const struct qstr *	2019-04-28 20:33:43 -04:00
audit.c	audit: connect LOGIN record to its syscall record	2019-03-20 20:57:48 -04:00
audit.h	audit_compare_dname_path(): switch to const struct qstr *	2019-04-28 20:33:43 -04:00
auditfilter.c	Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-05-07 20:03:32 -07:00
auditsc.c	Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-05-07 20:03:32 -07:00
backtracetest.c	backtrace-test: Simplify stack trace handling	2019-04-29 12:37:47 +02:00
bounds.c
capability.c	LSM: add SafeSetID module that gates setid calls	2019-01-25 11:22:43 -08:00
compat.c	time: make adjtime compat handling available for 32 bit	2019-02-07 00:13:27 +01:00
configs.c	kernel/configs: use .incbin directive to embed config_data.gz	2019-03-07 18:32:02 -08:00
context_tracking.c
cpu_pm.c
cpu.c	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-05-06 14:50:46 -07:00
crash_core.c	kexec: export PG_offline to VMCOREINFO	2019-03-05 21:07:14 -08:00
crash_dump.c
cred.c	SELinux: Remove cred security blob poisoning	2019-01-08 13:18:44 -08:00
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	mm: change mm_update_next_owner() to update mm->owner with WRITE_ONCE	2019-05-14 19:52:47 -07:00
extable.c
fail_function.c	treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively	2019-04-09 14:19:06 +02:00
fork.c	userfaultfd: use RCU to free the task struct when fork fails	2019-05-14 19:52:47 -07:00
freezer.c
futex.c	mm/gup: change GUP fast to use flags rather than a write 'bool'	2019-05-14 09:47:46 -07:00
gen_ikh_data.sh	Provide in-kernel headers to make extending kernel easier	2019-04-29 16:48:03 +02:00
groups.c
hung_task.c	kernel/hung_task.c: Use continuously blocked time when reporting.	2019-03-07 18:31:59 -08:00
iomem.c	mm/resource: Use resource_overlaps() to simplify region_intersects()	2019-04-19 12:59:36 +02:00
irq_work.c	irq_work: Do not raise an IPI when queueing work on the local CPU	2019-04-18 14:07:52 +02:00
jump_label.c	locking/static_key: Don't take sleeping locks in __static_key_slow_dec_deferred()	2019-04-29 08:29:21 +02:00
kallsyms.c	bpf: Add module name [bpf] to ksymbols for bpf programs	2019-01-21 17:38:56 -03:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks	Remove Mysterious Macro Intended to Obscure Weird Behaviours (mmiowb())	2019-05-06 16:57:52 -07:00
Kconfig.preempt	kconfig: warn no new line at end of file	2018-12-15 17:44:35 +09:00
kcov.c	kcov: convert kcov.refcount to refcount_t	2019-03-07 18:32:02 -08:00
kexec_core.c	power/suspend: Add function to disable secondaries for suspend	2019-05-03 19:42:41 +02:00
kexec_file.c	mm: memblock: make keeping memblock memory opt-in rather than opt-out	2019-05-14 09:47:50 -07:00
kexec_internal.h
kexec.c
kheaders.c	Provide in-kernel headers to make extending kernel easier	2019-04-29 16:48:03 +02:00
kmod.c
kprobes.c	kprobes: Fix error check when reusing optimized probes	2019-04-16 09:38:16 +02:00
ksysfs.c
kthread.c	include/: refactor headers to allow kthread.h inclusion in psi_types.h	2019-05-14 19:52:48 -07:00
latencytop.c	latency_top: Simplify stack trace handling	2019-04-29 12:37:48 +02:00
Makefile	kernel/Makefile: don't assume that kernel/gen_ikh_data.sh is executable	2019-05-14 19:52:47 -07:00
memremap.c	kernel/memremap.c: remove the unused device_private_entry_fault() export	2019-05-14 09:47:51 -07:00
module_signing.c	modsign: use all trusted keys to verify module signature	2018-11-07 14:41:41 +01:00
module-internal.h
module.c	Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-05-09 12:54:40 -07:00
notifier.c	kernel/notifier.c: double register detection	2019-05-14 19:52:49 -07:00
nsproxy.c
padata.c	padata: Replace padata_attr_type default_attrs field with groups	2019-04-25 22:06:11 +02:00
panic.c	s390: simplify disabled_wait	2019-05-02 13:54:11 +02:00
params.c
pid_namespace.c
pid.c	Fix failure path in alloc_pid()	2018-12-28 12:42:30 -08:00
profile.c
ptrace.c	ptrace: take into account saved_sigmask in PTRACE{GET,SET}SIGMASK	2019-03-29 10:01:37 -07:00
range.c
reboot.c
relay.c	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-03-12 13:27:20 -07:00
resource.c	mm/resource: Use resource_overlaps() to simplify region_intersects()	2019-04-19 12:59:36 +02:00
rseq.c	rseq: Remove superfluous rseq_len from task_struct	2019-04-19 12:39:32 +02:00
seccomp.c	audit/stable-5.2 PR 20190507	2019-05-07 19:06:04 -07:00
signal.c	Merge branch 'for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2019-05-09 13:52:12 -07:00
smp.c	cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM	2019-01-30 19:27:00 +01:00
smpboot.c
smpboot.h
softirq.c	softirq: Remove tasklet_hrtimer	2019-03-22 14:36:02 +01:00
stackleak.c	stackleak: Mark stackleak_track_stack() as notrace	2018-12-05 19:31:44 -08:00
stacktrace.c	stacktrace: Provide common infrastructure	2019-04-29 12:37:57 +02:00
stop_machine.c	treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively	2019-04-09 14:19:06 +02:00
sys_ni.c	signal: support CLONE_PIDFD with pidfd_send_signal	2019-05-07 14:31:03 +02:00
sys.c	kernel/sys.c: prctl: fix false positive in validate_prctl_map()	2019-05-14 09:47:44 -07:00
sysctl_binary.c	kernel/sysctl: add panic_print into sysctl	2019-01-04 13:13:47 -08:00
sysctl.c	userfaultfd/sysctl: add vm.unprivileged_userfaultfd	2019-05-14 09:47:45 -07:00
task_work.c
taskstats.c	genetlink: optionally validate strictly/dumps	2019-04-27 17:07:22 -04:00
test_kprobes.c
torture.c	torture: Don't try to offline the last CPU	2019-03-26 14:42:53 -07:00
tracepoint.c	tracing: Replace synchronize_sched() and call_rcu_sched()	2018-11-27 09:21:41 -08:00
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c	umh: add exit routine for UMH process	2019-01-11 18:05:40 -08:00
up.c
user_namespace.c	userns: also map extents in the reverse map to kernel IDs	2018-11-07 23:51:16 -06:00
user-return-notifier.c
user.c
utsname_sysctl.c
utsname.c
watchdog_hld.c	kernel/watchdog_hld.c: hard lockup message should end with a newline	2019-04-19 09:46:05 -07:00
watchdog.c	watchdog: Fix typo in comment	2019-04-18 14:05:51 +02:00
workqueue_internal.h	sched/core, workqueues: Distangle worker accounting from rq lock	2019-04-16 16:55:15 +02:00
workqueue.c	Merge branch 'for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2019-05-09 13:48:52 -07:00