Oleg Nesterov dd1c1f2f20 pids: make task_tgid_nr_ns() safe ... This was reported many times, and this was even mentioned in commit 52ee2dfdd4 ("pids: refactor vnr/nr_ns helpers to make them safe") but somehow nobody bothered to fix the obvious problem: task_tgid_nr_ns() is not safe because task->group_leader points to nowhere after the exiting task passes exit_notify(), rcu_read_lock() can not help. We really need to change __unhash_process() to nullify group_leader, parent, and real_parent, but this needs some cleanups. Until then we can turn task_tgid_nr_ns() into another user of __task_pid_nr_ns() and fix the problem. Reported-by: Troy Kensinger <tkensinger@google.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2017-08-21 12:47:31 -07:00
..
bpf	bpf: fix bpf_prog_get_info_by_fd to dump correct xlated_prog_len	2017-07-29 23:29:41 -07:00
cgroup	cpuset: fix a deadlock due to incomplete patching of cpusets_enabled()	2017-08-02 17:16:12 -07:00
configs	config: android-base: disable CONFIG_NFSD and CONFIG_NFS_FS	2017-06-09 11:47:38 +02:00
debug	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	2017-03-02 08:42:34 +01:00
events	perf/core: Fix time on IOC_ENABLE	2017-08-10 12:01:09 +02:00
gcov	gcov: support GCC 7.1	2017-05-12 15:57:15 -07:00
irq	genirq/ipi: Fixup checks against nr_cpu_ids	2017-08-20 10:49:05 +02:00
livepatch	livepatch: Fix stacking of patches with respect to RCU	2017-06-20 10:42:19 +02:00
locking	Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-07-21 11:11:23 -07:00
power	mm: fix global NR_SLAB_.*CLAIMABLE counter reads	2017-08-10 15:54:06 -07:00
printk	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2017-07-05 11:11:26 -07:00
rcu	rcu: Remove RCU CPU stall warnings from Tiny RCU	2017-06-08 18:52:45 -07:00
sched	sched/core: Fix some documentation build warnings	2017-07-25 11:17:02 +02:00
time	timers: Fix overflow in get_next_timer_interrupt	2017-08-01 14:20:53 +02:00
trace	bpf: fix bpf_trace_printk on 32 bit archs	2017-08-15 17:32:15 -07:00
.gitignore
acct.c	sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>	2017-03-02 08:42:39 +01:00
async.c	async: Adjust system_state checks	2017-05-23 10:01:37 +02:00
audit_fsnotify.c	Merge branch 'fsnotify' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-05-03 11:05:15 -07:00
audit_tree.c	Merge branch 'fsnotify' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs	2017-05-03 11:05:15 -07:00
audit_watch.c	audit/stable-4.13 PR 20170816	2017-08-16 16:48:34 -07:00
audit.c	Merge branch 'stable-4.13' of git://git.infradead.org/users/pcmoore/audit	2017-07-20 10:22:26 -07:00
audit.h	audit: style fix	2017-06-12 18:07:43 -04:00
auditfilter.c	audit: kernel generated netlink traffic should have a portid of 0	2017-05-02 10:16:05 -04:00
auditsc.c	Merge branch 'stable-4.13' of git://git.infradead.org/users/pcmoore/audit	2017-07-05 11:24:05 -07:00
backtracetest.c
bounds.c
capability.c	capability: export has_capability	2017-01-12 07:01:56 -07:00
compat.c	Merge branch 'misc.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-07-06 20:57:13 -07:00
configs.c
context_tracking.c
cpu_pm.c
cpu.c	smp/hotplug: Replace BUG_ON and react useful	2017-07-11 22:25:44 +02:00
crash_core.c	kdump: protect vmcoreinfo data under the crash memory	2017-07-12 16:26:00 -07:00
crash_dump.c
cred.c	doc: ReSTify credentials.txt	2017-05-18 10:30:19 -06:00
delayacct.c	sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>	2017-03-02 08:42:39 +01:00
dma.c
elfcore.c
exec_domain.c
exit.c	kernel/exit.c: avoid undefined behaviour when calling wait4()	2017-07-10 16:32:36 -07:00
extable.c	lib/extable.c: use bsearch() library function in search_extable()	2017-07-10 16:32:35 -07:00
fork.c	mm: migrate: prevent racy access to tlb_flush_pending	2017-08-10 15:54:07 -07:00
freezer.c
futex_compat.c
futex.c	futex: Remove unnecessary warning from get_futex_key	2017-08-09 14:00:54 -07:00
groups.c	kernel/groups.c: use sort library function	2017-07-10 16:32:34 -07:00
hung_task.c	kernel/hung_task.c: defer showing held locks	2017-05-08 17:15:10 -07:00
irq_work.c
jump_label.c	jump_label: Reorder hotplug lock and jump_label_lock	2017-05-26 10:10:45 +02:00
kallsyms.c	kernel/kallsyms.c: replace all_var with IS_ENABLED(CONFIG_KALLSYMS_ALL)	2017-07-10 16:32:34 -07:00
kcmp.c	kcmp: add KCMP_EPOLL_TFD mode to compare epoll target files	2017-07-12 16:26:01 -07:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: simplify interrupt check	2017-05-08 17:15:12 -07:00
kexec_core.c	kdump: protect vmcoreinfo data under the crash memory	2017-07-12 16:26:00 -07:00
kexec_file.c	kexec_file: adjust declaration of kexec_purgatory	2017-07-12 16:26:02 -07:00
kexec_internal.h	kexec_file: adjust declaration of kexec_purgatory	2017-07-12 16:26:02 -07:00
kexec.c	kdump: protect vmcoreinfo data under the crash memory	2017-07-12 16:26:00 -07:00
kmod.c	kmod: fix wait on recursive loop	2017-08-18 15:32:01 -07:00
kprobes.c	kprobes: Ensure that jprobe probepoints are at function entry	2017-07-08 11:05:35 +02:00
ksysfs.c	kexec: move vmcoreinfo out of the kernel's .bss section	2017-07-12 16:25:59 -07:00
kthread.c	cgroup, kthread: close race window where new kthreads can be migrated to non-root cgroups	2017-03-17 10:18:47 -04:00
latencytop.c	sched/headers: Prepare to move sched_info_on() and force_schedstat_enabled() from <linux/sched.h> to <linux/sched/stat.h>	2017-03-02 08:42:39 +01:00
Makefile	kernel/watchdog: split up config options	2017-07-12 16:26:02 -07:00
membarrier.c	Fix: Disable sys_membarrier when nohz_full is enabled	2017-01-23 11:32:16 -08:00
memremap.c	mm, memory_hotplug: replace for_device by want_memblock in arch_add_memory	2017-07-06 16:24:32 -07:00
module_signing.c
module-internal.h
module.c	Modules updates for v4.13	2017-07-12 17:22:01 -07:00
notifier.c	kernel/notifier.c: simplify expression	2017-02-24 17:46:56 -08:00
nsproxy.c	perf: Add PERF_RECORD_NAMESPACES to include namespaces related info	2017-03-13 15:57:41 -03:00
padata.c	padata: Avoid nested calls to cpus_read_lock() in pcrypt_init_padata()	2017-05-26 10:10:37 +02:00
panic.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h>	2017-03-02 08:42:34 +01:00
params.c	boot/param: Move next_arg() function to lib/cmdline.c for later reuse	2017-04-18 10:37:13 +02:00
pid_namespace.c	pid_ns: Sleep in TASK_INTERRUPTIBLE in zap_pid_ns_processes	2017-05-13 17:26:01 -05:00
pid.c	pids: make task_tgid_nr_ns() safe	2017-08-21 12:47:31 -07:00
profile.c	sched/headers: Prepare to move sched_info_on() and force_schedstat_enabled() from <linux/sched.h> to <linux/sched/stat.h>	2017-03-02 08:42:39 +01:00
ptrace.c	ptrace: Properly initialize ptracer_cred on fork	2017-05-23 07:40:44 -05:00
range.c
reboot.c
relay.c	Merge branch 'work.splice' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-05-02 11:38:06 -07:00
resource.c
seccomp.c	seccomp: Switch from atomic_t to recount_t	2017-06-26 09:24:00 -07:00
signal.c	signal: don't remove SIGNAL_UNKILLABLE for traced tasks.	2017-08-18 15:32:02 -07:00
smp.c	smp, cpumask: Use non-atomic cpumask_{set,clear}_cpu()	2017-05-23 10:01:32 +02:00
smpboot.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>	2017-03-02 08:42:35 +01:00
smpboot.h
softirq.c	sched/core: Remove 'task' parameter and rename tsk_restore_flags() to current_restore_flags()	2017-04-11 09:06:32 +02:00
stacktrace.c	stacktrace/x86: add function for detecting reliable stack traces	2017-03-08 09:18:02 +01:00
stop_machine.c	stop_machine: Provide stop_machine_cpuslocked()	2017-05-26 10:10:36 +02:00
sys_ni.c
sys.c	fix a braino in compat_sys_getrlimit()	2017-07-12 09:15:00 -07:00
sysctl_binary.c	kernel/sysctl_binary.c: check name array length in deprecated_sysctl_warning()	2017-07-12 16:26:00 -07:00
sysctl.c	kernel/watchdog: split up config options	2017-07-12 16:26:02 -07:00
task_work.c
taskstats.c	taskstats: add e/u/stime for TGID command	2017-05-08 17:15:12 -07:00
test_kprobes.c
torture.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
tracepoint.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>	2017-03-02 08:42:35 +01:00
tsacct.c	sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>	2017-03-02 08:42:39 +01:00
ucount.c	ucount: Remove the atomicity from ucount->count	2017-03-06 15:26:37 -06:00
uid16.c	sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>	2017-03-02 08:42:31 +01:00
up.c
user_namespace.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>	2017-03-02 08:42:29 +01:00
user-return-notifier.c
user.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/user.h>	2017-03-02 08:42:29 +01:00
utsname_sysctl.c	sched/headers: Remove <linux/rwsem.h> from <linux/sched.h>	2017-03-03 01:45:36 +01:00
utsname.c	sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>	2017-03-02 08:42:38 +01:00
watchdog_hld.c	kernel/watchdog: Prevent false positives with turbo modes	2017-08-18 12:35:02 +02:00
watchdog.c	kernel/watchdog: Prevent false positives with turbo modes	2017-08-18 12:35:02 +02:00
workqueue_internal.h
workqueue.c	workqueue: Work around edge cases for calc of pool's cpumask	2017-07-28 11:05:52 -04:00