Andrei Vagin e790eeabc4 kernel/exit.c: release ptraced tasks before zap_pid_ns_processes ... commit 8fb335e078378c8426fabeed1ebee1fbf915690c upstream. Currently, exit_ptrace() adds all ptraced tasks in a dead list, then zap_pid_ns_processes() waits on all tasks in a current pidns, and only then are tasks from the dead list released. zap_pid_ns_processes() can get stuck on waiting tasks from the dead list. In this case, we will have one unkillable process with one or more dead children. Thanks to Oleg for the advice to release tasks in find_child_reaper(). Link: http://lkml.kernel.org/r/20190110175200.12442-1-avagin@gmail.com Fixes: 7c8bd2322c ("exit: ptrace: shift "reap dead" code from exit_ptrace() to forget_original_parent()") Signed-off-by: Andrei Vagin <avagin@gmail.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-02-06 19:43:07 +01:00
..
bpf	bpf: Prevent memory disambiguation attack	2018-12-17 21:55:15 +01:00
configs	kconfig: tinyconfig: provide whole choice blocks to avoid warnings	2016-09-24 10:07:42 +02:00
debug	kdb: use memmove instead of overlapping memcpy	2018-12-13 09:21:29 +01:00
events	mm: replace get_user_pages() write/force parameters with gup_flags	2018-12-17 21:55:16 +01:00
gcov	gcov: disable for COMPILE_TEST	2018-01-23 19:50:10 +01:00
irq	genirq: Fix race on spurious interrupt detection	2018-11-21 09:27:35 +01:00
livepatch	livepatch: x86: fix relocation computation with kASLR	2015-11-11 17:36:04 +01:00
locking	locking/lockdep: Fix debug_locks off performance problem	2018-11-21 09:27:31 +01:00
power	PM / sleep: wakeup: Fix build error caused by missing SRCU support	2018-09-09 20:04:34 +02:00
printk	printk: Fix panic caused by passing log_buf_len to command line	2018-11-21 09:27:35 +01:00
rcu	rcu: Allow for page faults in NMI handlers	2017-10-18 09:20:41 +02:00
sched	sched/core: Allow __sched_setscheduler() in interrupts when PI is not used	2018-12-01 09:46:41 +01:00
time	timer/debug: Change /proc/timer_list from 0444 to 0400	2018-12-21 14:09:49 +01:00
trace	tracing: Fix memory leak of instance function hash filters	2018-12-21 14:09:51 +01:00
.gitignore
acct.c	kernel/acct.c: fix the acct->needcheck check in check_free_space()	2018-01-10 09:27:08 +01:00
async.c	kernel/async.c: revert "async: simplify lowest_in_progress()"	2018-02-16 20:09:45 +01:00
audit.c	audit: return on memory error to avoid null pointer dereference	2018-05-30 07:49:16 +02:00
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c	audit: fix use-after-free in audit_add_watch	2018-09-26 08:35:08 +02:00
auditfilter.c	audit: allow not equal op for audit by executable	2018-08-06 16:24:38 +02:00
auditsc.c	audit: allow not equal op for audit by executable	2018-08-06 16:24:38 +02:00
backtracetest.c
bounds.c	kbuild: fix kernel/bounds.c 'W=1' warning	2018-11-21 09:27:35 +01:00
capability.c	exec: Ensure mm->user_ns contains the execed files	2017-01-06 11:16:14 +01:00
cgroup.c	cgroup: Fix deadlock in cpu hotplug path	2018-10-13 09:11:33 +02:00
cgroup_freezer.c	cgroup: fix handling of multi-destination migration from subtree_control enabling	2015-12-03 10:18:21 -05:00
cgroup_pids.c	cgroup_pids: don't account for the root cgroup	2015-12-03 10:18:21 -05:00
compat.c
configs.c
context_tracking.c	context_tracking: avoid irq_save/irq_restore on guest entry and exit	2015-11-10 12:06:23 +01:00
cpu.c	stable-fixup: hotplug: fix unused function warning	2017-01-12 11:22:48 +01:00
cpu_pm.c
cpuset.c	sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs	2017-10-12 11:27:35 +02:00
crash_dump.c
cred.c	cred: Reject inodes with invalid ids in set_create_file_as()	2016-09-15 08:27:49 +02:00
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	kernel/exit.c: release ptraced tasks before zap_pid_ns_processes	2019-02-06 19:43:07 +01:00
extable.c	kernel/extable.c: mark core_kernel_text notrace	2017-07-21 07:44:56 +02:00
fork.c	fork: record start_time late	2019-01-13 10:05:32 +01:00
freezer.c
futex.c	futex: futex_wake_op, fix sign_extend32 sign bits	2018-05-26 08:48:51 +02:00
futex_compat.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-02-25 12:01:16 -08:00
groups.c	kernel: make groups_sort calling a responsibility group_info allocators	2018-01-10 09:27:10 +01:00
hung_task.c
irq_work.c	treewide: Remove old email address	2015-11-23 09:44:58 +01:00
jump_label.c	jump_label: Invoke jump_label_test() via early_initcall()	2017-12-16 10:33:55 +01:00
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: use file name as the output message prefix	2015-11-06 17:50:42 -08:00
kexec_core.c	kexec: use file name as the output message prefix	2015-11-06 17:50:42 -08:00
kexec_file.c	kexec: fix double-free when failing to relocate the purgatory	2016-09-24 10:07:36 +02:00
kexec_internal.h
kmod.c
kprobes.c	kprobes: Return error if we fail to reuse kprobe instead of BUG_ON()	2018-11-21 09:27:32 +01:00
ksysfs.c
kthread.c	kthread, tracing: Don't expose half-written comm when creating kthreads	2018-09-09 20:04:34 +02:00
latencytop.c
Makefile
membarrier.c	Fix: Disable sys_membarrier when nohz_full is enabled	2017-03-12 06:37:26 +01:00
memremap.c	mm, devm_memremap_pages: kill mapping "System RAM" support	2019-01-13 10:05:32 +01:00
module-internal.h
module.c	module: exclude SHN_UNDEF symbols from kallsyms api	2018-10-10 08:52:07 +02:00
module_signing.c
notifier.c
nsproxy.c
padata.c	padata: free correct variable	2017-05-20 14:27:02 +02:00
panic.c	kernel/panic.c: add missing \n	2017-07-05 14:37:19 +02:00
params.c	Nothing exciting, minor tweaks and cleanups.	2015-11-09 15:53:39 -08:00
pid.c	pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()	2018-04-13 19:50:03 +02:00
pid_namespace.c	pid_ns: Sleep in TASK_INTERRUPTIBLE in zap_pid_ns_processes	2017-05-25 14:30:11 +02:00
profile.c	profile: hide unused functions when !CONFIG_PROC_FS	2018-02-25 11:03:44 +01:00
ptrace.c	ptrace: Properly initialize ptracer_cred on fork	2017-06-14 13:16:20 +02:00
range.c
reboot.c
relay.c	kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE	2018-05-30 07:49:00 +02:00
resource.c	resource: fix integer overflow at reallocation	2018-04-24 09:32:05 +02:00
seccomp.c	seccomp: Move speculation migitation control to arch code	2018-07-25 10:18:27 +02:00
signal.c	signal: Always deliver the kernel's SIGKILL and SIGSTOP to a pid namespace init	2018-11-21 09:27:33 +01:00
smp.c	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
smpboot.c
smpboot.h
softirq.c
stacktrace.c
stop_machine.c	kernel: remove stop_machine() Kconfig dependency	2015-12-12 10:15:34 -08:00
sys.c	sys: don't hold uts_sem while accessing userspace memory	2018-09-09 20:04:35 +02:00
sys_ni.c	mm: mlock: add new mlock system call	2015-11-05 19:34:48 -08:00
sysctl.c	namei: allow restricted O_CREAT of FIFOs and regular files	2018-12-01 09:46:41 +01:00
sysctl_binary.c	fs/coredump: prevent fsuid=0 dumps into user-controlled directories	2016-04-12 09:08:58 -07:00
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c	tracepoint: Do not warn on ENOMEM	2018-05-16 10:06:47 +02:00
tsacct.c
uid16.c	kernel: make groups_sort calling a responsibility group_info allocators	2018-01-10 09:27:10 +01:00
up.c
user-return-notifier.c
user.c
user_namespace.c	userns: move user access out of the mutex	2018-09-09 20:04:35 +02:00
utsname.c
utsname_sysctl.c	sys: don't hold uts_sem while accessing userspace memory	2018-09-09 20:04:35 +02:00
watchdog.c	kernel/watchdog: use nmi registers snapshot in hardlockup handler	2017-01-06 11:16:16 +01:00
workqueue.c	workqueue: use put_device() instead of kfree()	2018-05-30 07:49:04 +02:00
workqueue_internal.h	workqueue: Fix NULL pointer dereference	2017-11-15 17:13:11 +01:00