Oleg Nesterov 43742b14ff ptrace: don't clear GROUP_STOP_SIGMASK on double-stop ...

[This does not correspond to any specific patch in the upstream tree as it was
fixed accidentally by rewriting the code in the 3.1 release]

https://bugzilla.redhat.com/show_bug.cgi?id=740121

1. Luke Macken triggered WARN_ON(!(group_stop & GROUP_STOP_SIGMASK))
   in do_signal_stop().

   This is because do_signal_stop() clears GROUP_STOP_SIGMASK part
   unconditionally but doesn't update it if task_is_stopped().

2. Looking at this problem I noticed that WARN_ON_ONCE(!ptrace) is
   not right, a stopped-but-resumed tracee can clone the untraced
   thread in the SIGNAL_STOP_STOPPED group, the new thread can start
   another group-stop.

   Remove this warning, we need more fixes to make it true.

Reported-by: Luke Macken <lmacken@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2011-11-11 09:36:23 -08:00

..

debug

Fix common misspellings

2011-03-31 11:26:23 -03:00

events

perf: Fix software event overflow

2011-08-04 21:58:35 -07:00

gcov

gcov: disable CONFIG_CONSTRUCTORS when not needed by CONFIG_GCOV_KERNEL

2011-06-15 20:04:01 -07:00

irq

genirq: Add IRQF_RESUME_EARLY and resume such IRQs earlier

2011-11-11 09:35:54 -08:00

power

PM / Hibernate: Fix free_unnecessary_pages()

2011-07-06 20:15:23 +02:00

time

alarmtimers: Avoid possible denial of service with high freq periodic timers

2011-10-03 11:40:07 -07:00

trace

tracing: Fix returning of duplicate data after EOF in trace_pipe_raw

2011-11-11 09:35:53 -08:00

.gitignore

…

acct.c

…

async.c

…

audit_tree.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

audit_watch.c

kill path_lookup()

2011-03-14 09:15:23 -04:00

audit.c

netlink: kill loginuid/sessionid/sid members from struct netlink_skb_parms

2011-03-03 10:55:40 -08:00

audit.h

audit: make functions static

2010-10-30 01:42:19 -04:00

auditfilter.c

netlink: kill loginuid/sessionid/sid members from struct netlink_skb_parms

2011-03-03 10:55:40 -08:00

auditsc.c

audit: acquire creds selectively to reduce atomic op overhead

2011-04-27 15:11:03 +02:00

backtracetest.c

…

bounds.c

memcg: remove direct page_cgroup-to-page pointer

2011-03-23 19:46:28 -07:00

capability.c

Merge branch 'master' into next

2011-05-19 18:51:57 +10:00

cgroup_freezer.c

cgroups: add per-thread subsystem callbacks

2011-05-26 17:12:34 -07:00

cgroup.c

cgroup: remove the ns_cgroup

2011-05-26 17:12:34 -07:00

compat.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

2011-05-25 15:35:32 -07:00

configs.c

llseek: automatically add .llseek fop

2010-10-15 15:53:27 +02:00

cpu.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

cpuset.c

cpuset: Fix cpuset_cpus_allowed_fallback(), don't update tsk->rt.nr_cpus_allowed

2011-05-28 17:02:57 +02:00

crash_dump.c

crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn

2011-03-23 19:47:19 -07:00

cred.c

Merge branch 'docs-move' of git://git.kernel.org/pub/scm/linux/kernel/git/rdunlap/linux-docs

2011-05-27 10:25:02 -07:00

delayacct.c

…

dma.c

…

elfcore.c

…

exec_domain.c

…

exit.c

memcg: clear mm->owner when last possible owner leaves

2011-06-15 20:04:01 -07:00

extable.c

extable, core_kernel_data(): Make sure all archs define _sdata

2011-05-20 08:56:56 +02:00

fork.c

mm: Fix boot crash in mm_alloc()

2011-05-29 11:32:28 -07:00

freezer.c

Freezer: Use SMP barriers

2011-05-17 23:19:17 +02:00

futex_compat.c

userns: user namespaces: convert several capable() calls

2011-03-23 19:47:08 -07:00

futex.c

futex: Fix regression with read only mappings

2011-08-15 18:31:32 -07:00

groups.c

userns: user namespaces: convert several capable() calls

2011-03-23 19:47:08 -07:00

hrtimer.c

hrtimers: Fix typo causing erratic timers

2011-05-25 15:31:58 -07:00

hung_task.c

watchdog, hung_task_timeout: Add Kconfig configurable default

2011-04-28 09:13:17 +02:00

irq_work.c

irq_work: Use per cpu atomics instead of regular atomics

2010-12-18 15:54:48 +01:00

itimer.c

…

jump_label.c

jump_label: Fix jump_label update for modules

2011-06-29 09:59:17 -04:00

kallsyms.c

Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2011-03-25 17:52:22 -07:00

Kconfig.freezer

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Kconfig.hz

…

Kconfig.locks

arch:Kconfig.locks Remove unused config option.

2011-04-10 17:01:05 +02:00

Kconfig.preempt

…

kexec.c

PM: Remove sysdev suspend, resume and shutdown operations

2011-05-11 21:37:15 +02:00

kfifo.c

kfifo: fix scatterlist usage

2010-10-01 10:50:58 -07:00

kmod.c

kmod: prevent kmod_loop_msg overflow in __request_module()

2011-11-11 09:35:48 -08:00

kprobes.c

Merge branch 'for-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

2011-01-07 17:02:58 -08:00

ksysfs.c

kernel/ksysfs.c: expose file_caps_enabled in sysfs

2011-04-19 16:45:51 -07:00

kthread.c

cpuset: Fix cpuset_cpus_allowed_fallback(), don't update tsk->rt.nr_cpus_allowed

2011-05-28 17:02:57 +02:00

latencytop.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

lockdep_internals.h

…

lockdep_proc.c

lockdep: Remove unused 'factor' variable from lockdep_stats_show()

2011-03-23 13:54:47 +01:00

lockdep_states.h

…

lockdep.c

lockdep: Fix lock_is_held() on recursion

2011-06-07 12:25:50 +02:00

Makefile

cgroup: remove the ns_cgroup

2011-05-26 17:12:34 -07:00

module.c

Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6

2011-05-23 12:49:28 -07:00

mutex-debug.c

mutex: Use p->on_cpu for the adaptive spin

2011-04-14 08:52:33 +02:00

mutex-debug.h

mutex: Use p->on_cpu for the adaptive spin

2011-04-14 08:52:33 +02:00

mutex.c

lockdep, mutex: provide mutex_lock_nest_lock

2011-05-25 08:39:17 -07:00

mutex.h

mutex: Use p->on_cpu for the adaptive spin

2011-04-14 08:52:33 +02:00

notifier.c

…

nsproxy.c

cgroup: remove the ns_cgroup

2011-05-26 17:12:34 -07:00

padata.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

panic.c

move x86 specific oops=panic to generic code

2011-03-22 17:44:11 -07:00

params.c

params.c: Use new strtobool function to process boolean inputs

2011-05-19 16:55:28 +09:30

pid_namespace.c

pidns: call pid_ns_prepare_proc() from create_pid_namespace()

2011-03-23 19:46:58 -07:00

pid.c

next_pidmap: fix overflow condition

2011-04-18 10:35:30 -07:00

pm_qos_params.c

Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6

2011-05-29 11:18:09 -07:00

posix-cpu-timers.c

cputimer: Cure lock inversion

2011-10-25 07:10:14 +02:00

posix-timers.c

posix-timers: RCU conversion

2011-05-24 12:10:51 +02:00

printk.c

kernel/printk: do not turn off bootconsole in printk_late_init() if keep_bootcon

2011-10-03 11:39:46 -07:00

profile.c

kernel/profile.c: remove some duplicate code from profile_hits()

2011-05-26 17:12:37 -07:00

ptrace.c

ptrace: ptrace_resume() shouldn't wake up !TASK_TRACED thread

2011-05-25 19:20:21 +02:00

range.c

kernel/range.c: fix clean_sort_range() for the case of full array

2010-11-12 07:55:31 -08:00

rcupdate.c

rcu: Use WARN_ON_ONCE for DEBUG_OBJECTS_RCU_HEAD warnings

2011-05-05 23:16:57 -07:00

rcutiny_plugin.h

rcu: Converge TINY_RCU expedited and normal boosting

2011-05-05 23:16:58 -07:00

rcutiny.c

sanitize <linux/prefetch.h> usage

2011-05-20 12:50:29 -07:00

rcutorture.c

rcu: mark rcutorture boosting callback as being on-stack

2011-05-05 23:16:57 -07:00

rcutree_plugin.h

softirq,rcu: Inform RCU of irq_exit() activity

2011-07-20 10:50:12 -07:00

rcutree_trace.c

rcu: use softirq instead of kthreads except when RCU_BOOST=y

2011-06-15 23:07:21 -07:00

rcutree.c

rcu: Prevent RCU callbacks from executing before scheduler initialized

2011-07-13 08:17:56 -07:00

rcutree.h

rcu: Move RCU_BOOST #ifdefs to header file

2011-06-16 16:12:05 -07:00

relay.c

Clean up relay_alloc_page_array() slightly by using vzalloc rather than vmalloc and memset

2010-11-05 08:21:34 -07:00

res_counter.c

memcg: res_counter_read_u64(): fix potential races on 32-bit machines

2011-03-23 19:46:22 -07:00

resource.c

resource: ability to resize an allocated resource

2011-07-06 10:54:08 -07:00

rtmutex_common.h

rtmutex: Simplify PI algorithm and make highest prio task get lock

2011-01-27 21:13:51 -05:00

rtmutex-debug.c

rtmutex: Simplify PI algorithm and make highest prio task get lock

2011-01-27 21:13:51 -05:00

rtmutex-debug.h

…

rtmutex-tester.c

rtmutex: tester: Remove the remaining BKL leftovers

2011-02-22 22:07:22 +01:00

rtmutex.c

rtmutex: Simplify PI algorithm and make highest prio task get lock

2011-01-27 21:13:51 -05:00

rtmutex.h

…

rwsem.c

…

sched_autogroup.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

sched_autogroup.h

sched, autogroup: Stop going ahead if autogroup is disabled

2011-02-23 11:33:59 +01:00

sched_clock.c

sched: Add some clock info to sched_debug

2010-11-23 10:29:08 +01:00

sched_cpupri.c

…

sched_cpupri.h

…

sched_debug.c

sched: Get rid of lock_depth

2011-04-24 13:18:38 +02:00

sched_fair.c

sched: Break out cpu_power from the sched_group structure

2011-07-20 18:32:40 +02:00

sched_features.h

sched: Allow for overlapping sched_domain spans

2011-07-20 18:32:41 +02:00

sched_idletask.c

sched: Drop the rq argument to sched_class::select_task_rq()

2011-04-14 08:52:36 +02:00

sched_rt.c

sched/rt: Migrate equal priority tasks to available CPUs

2011-10-16 14:14:51 -07:00

sched_stats.h

sched: More sched_domain iterations fixes

2011-05-28 17:02:54 +02:00

sched_stoptask.c

sched: Drop the rq argument to sched_class::select_task_rq()

2011-04-14 08:52:36 +02:00

sched.c

posix-cpu-timers: Cure SMP wobbles

2011-10-16 14:14:51 -07:00

seccomp.c

…

semaphore.c

…

signal.c

ptrace: don't clear GROUP_STOP_SIGMASK on double-stop

2011-11-11 09:36:23 -08:00

smp.c

generic-ipi: Fix kexec boot crash by initializing call_single_queue before enabling interrupts

2011-06-17 10:17:12 +02:00

softirq.c

softirq,rcu: Inform RCU of irq_exit() activity

2011-07-20 10:50:12 -07:00

spinlock.c

…

srcu.c

rcu: demote SRCU_SYNCHRONIZE_DELAY from kernel-parameter status

2011-01-14 04:56:49 -08:00

stacktrace.c

…

stop_machine.c

x86, mtrr: lock stop machine during MTRR rendezvous sequence

2011-08-29 13:29:08 -07:00

sys_ni.c

ipc: Add missing sys_ni entries for ipc/compat.c functions

2011-05-20 13:53:02 -07:00

sys.c

Avoid using variable-length arrays in kernel/sys.c

2011-10-25 07:10:14 +02:00

sysctl_binary.c

open-style analog of vfs_path_lookup()

2011-03-14 09:15:28 -04:00

sysctl_check.c

sysctl_check: drop dead code

2011-03-23 19:46:51 -07:00

sysctl.c

perf: Comment /proc/sys/kernel/perf_event_paranoid to be part of user ABI

2011-06-04 12:22:04 +02:00

taskstats.c

taskstats: don't allow duplicate entries in listener mode

2011-06-27 18:00:13 -07:00

test_kprobes.c

kprobes: Fix selftest to clear flags field for reusing probes

2010-10-14 08:55:27 +02:00

time.c

time: Change jiffies_to_clock_t() argument type to unsigned long

2011-11-11 09:35:52 -08:00

timeconst.pl

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timer.c

timers: Consider slack value in mod_timer()

2011-06-03 15:02:32 +02:00

tracepoint.c

jump label: Introduce static_branch() interface

2011-04-04 12:48:08 -04:00

tsacct.c

taskstats: use real microsecond granularity for CPU times

2010-10-27 18:03:17 -07:00

uid16.c

userns: user namespaces: convert several capable() calls

2011-03-23 19:47:08 -07:00

up.c

…

user_namespace.c

user_ns: improve the user_ns on-the-slab packaging

2011-01-13 08:03:18 -08:00

user-return-notifier.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

user.c

userns: add a user_namespace as creator/owner of uts_namespace

2011-03-23 19:46:59 -07:00

utsname_sysctl.c

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utsname.c

ns proc: Add support for the uts namespace

2011-05-10 14:35:35 -07:00

wait.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

watchdog.c

kernel/watchdog.c: Use proper ANSI C prototypes

2011-05-23 21:07:40 -07:00

workqueue_sched.h

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workqueue.c

workqueue: lock cwq access in drain_workqueue

2011-10-03 11:40:31 -07:00