Oleg Nesterov 2c60e18b07 ptrace: ensure JOBCTL_STOP_SIGMASK is not zero after detach ...

commit 8a88951b58 upstream.

This is the temporary simple fix for 3.2, we need more changes in this
area.

1. do_signal_stop() assumes that the running untraced thread in the
   stopped thread group is not possible. This was our goal but it is
   not yet achieved: a stopped-but-resumed tracee can clone the running
   thread which can initiate another group-stop.

   Remove WARN_ON_ONCE(!current->ptrace).

2. A new thread always starts with ->jobctl = 0. If it is auto-attached
   and this group is stopped, __ptrace_unlink() sets JOBCTL_STOP_PENDING
   but JOBCTL_STOP_SIGMASK part is zero, this triggers WANR_ON(!signr)
   in do_jobctl_trap() if another debugger attaches.

   Change __ptrace_unlink() to set the artificial SIGSTOP for report.

   Alternatively we could change ptrace_init_task() to copy signr from
   current, but this means we can copy it for no reason and hide the
   possible similar problems.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2012-01-06 14:17:34 -08:00

..

debug

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb

2011-08-01 13:39:40 -10:00

events

perf_event: Fix broken calc_timer_values()

2011-08-31 15:56:29 +02:00

gcov

gcov: disable CONSTRUCTORS for UML

2011-07-26 16:49:45 -07:00

irq

genirq: Fix race condition when stopping the irq thread

2011-12-09 08:55:47 -08:00

power

PM / Suspend: Off by one in pm_suspend()

2011-11-11 09:44:47 -08:00

time

Revert "clockevents: Set noop handler in clockevents_exchange_device()"

2012-01-03 10:11:29 -08:00

trace

tracing: fix event_subsystem ref counting

2011-12-09 08:55:52 -08:00

.gitignore

…

acct.c

pass a struct path to vfs_statfs

2010-08-09 16:48:42 -04:00

async.c

async: Fixed an include coding style issue

2011-06-14 22:48:46 -04:00

audit_tree.c

audit_tree,rcu: Convert call_rcu(__put_tree) to kfree_rcu()

2011-07-20 14:10:11 -07:00

audit_watch.c

kill path_lookup()

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

audit.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

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

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

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

cgroup_freezer: fix freezing groups with stopped tasks

2011-12-09 08:54:23 -08:00

cgroup.c

cgroups: fix a css_set not found bug in cgroup_attach_proc

2012-01-06 14:17:11 -08:00

compat.c

Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6

2011-07-30 00:08:53 -07:00

configs.c

kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n

2011-07-25 20:57:15 -07:00

cpu.c

Fix common misspellings

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

cpuset.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

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

move RLIMIT_NPROC check from set_user() to do_execve_common()

2011-08-11 11:24:42 -07:00

delayacct.c

KVM: Steal time implementation

2011-07-14 12:59:14 +03:00

dma.c

…

elfcore.c

elf coredump: add extended numbering support

2010-03-06 11:26:46 -08:00

exec_domain.c

sys_personality: remove the bogus checks in sys_personality()->__set_personality() path

2010-08-09 20:45:05 -07:00

exit.c

ptrace: partially fix the do_wait(WEXITED) vs EXIT_DEAD->EXIT_ZOMBIE race

2012-01-06 14:17:34 -08:00

extable.c

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

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

fork.c

move RLIMIT_NPROC check from set_user() to do_execve_common()

2011-08-11 11:24:42 -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 uninterruptible loop due to gate_area

2012-01-06 14:17:22 -08:00

groups.c

userns: user namespaces: convert several capable() calls

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

hrtimer.c

hrtimer: Fix extra wakeups from __remove_hrtimer()

2011-12-09 08:54:23 -08:00

hung_task.c

hung_task: fix false positive during vfork

2012-01-06 14:17:33 -08:00

irq_work.c

irq_work: Use per cpu atomics instead of regular atomics

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

itimer.c

itimers: Fix racy writes to cpu_itimer fields

2009-11-18 16:32:12 +01:00

jump_label.c

jump_label: jump_label_inc may return before the code is patched

2011-12-09 08:55:54 -08:00

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

…

Kconfig.hz

…

Kconfig.locks

arch:Kconfig.locks Remove unused config option.

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

Kconfig.preempt

sched: Isolate preempt counting in its own config option

2011-06-10 15:15:40 +02:00

kexec.c

treewide: Convert uses of struct resource to resource_size(ptr)

2011-06-10 14:55:36 +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 09:43:01 -08:00

kprobes.c

kprobes: Return -ENOENT if probe point doesn't exist

2011-07-15 15:11:47 -04:00

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: No need to disable preemption in debug atomic ops

2010-05-04 05:38:16 +02:00

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, kmemcheck: Annotate ->lock in lockdep_init_map()

2011-12-21 12:58:22 -08:00

Makefile

jump label: Reduce the cycle count by changing the link order

2011-08-05 23:57:33 +02:00

module.c

module: add /sys/module/<name>/uevent files

2011-07-24 22:06:04 +09:30

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

notifiers: sys: move reboot notifiers into reboot.h

2011-07-25 20:57:14 -07:00

nsproxy.c

make sure that nsproxy_cache is initialized early enough

2011-07-20 01:44:07 -04:00

padata.c

Fix common misspellings

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

panic.c

panic: panic=-1 for immediate reboot

2011-07-26 16:49:45 -07:00

params.c

module: add /sys/module/<name>/uevent files

2011-07-24 22:06:04 +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

rcu: treewide: Do not use rcu_read_lock_held when calling rcu_dereference_check

2011-07-08 22:21:58 +02:00

pm_qos_params.c

plist: Remove the need to supply locks to plist heads

2011-07-08 14:02:53 +02:00

posix-cpu-timers.c

cputimer: Cure lock inversion

2011-10-18 11:36:59 +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

2011-08-25 16:25:34 -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: ensure JOBCTL_STOP_SIGMASK is not zero after detach

2012-01-06 14:17:34 -08:00

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

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -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

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

rcutree_plugin.h

softirq,rcu: Inform RCU of irq_exit() activity

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

rcutree_trace.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -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: fix wrong resource window calculation

2011-09-29 20:04:34 -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

plist: Remove the need to supply locks to plist heads

2011-07-08 14:02:53 +02:00

rtmutex.h

…

rwsem.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

sched_autogroup.c

Fix common misspellings

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

sched_autogroup.h

sched: Skip autogroup when looking for all rt sched groups

2011-07-01 10:39:08 +02:00

sched_clock.c

sched: Add some clock info to sched_debug

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

sched_cpupri.c

sched: No need for bootmem special cases

2010-07-17 12:06:22 +02:00

sched_cpupri.h

sched: No need for bootmem special cases

2010-07-17 12:06:22 +02:00

sched_debug.c

sched: Get rid of lock_depth

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

sched_fair.c

sched: Cleanup duplicate local variable in [enqueue|dequeue]_task_fair

2011-07-22 12:47:22 +02:00

sched_features.h

Merge branch 'kvm-updates/3.1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2011-07-24 09:07:03 -07:00

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

2011-09-18 13:48:56 +02:00

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

2011-09-30 14:07:06 +02:00

seccomp.c

…

semaphore.c

…

signal.c

ptrace: ensure JOBCTL_STOP_SIGMASK is not zero after detach

2012-01-06 14:17:34 -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

locking: Cleanup the name space completely

2009-12-14 23:55:33 +01:00

srcu.c

rcu: demote SRCU_SYNCHRONIZE_DELAY from kernel-parameter status

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

stacktrace.c

stack_trace: Add weak save_stack_trace_regs()

2011-06-14 22:48:52 -04:00

stop_machine.c

atomic: use <linux/atomic.h>

2011-07-26 16:49:47 -07:00

sys_ni.c

All Arch: remove linkage for sys_nfsservctl system call

2011-08-26 15:09:58 -07:00

sys.c

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

2011-10-17 08:24:24 -07:00

sysctl_binary.c

binary_sysctl(): fix memory leak

2012-01-06 14:17:02 -08:00

sysctl_check.c

xfs: remove subdirectories

2011-08-12 16:21:35 -05:00

sysctl.c

sysctl,rcu: Convert call_rcu(free_head) to kfree

2011-07-20 14:10:18 -07:00

taskstats.c

Make TASKSTATS require root access

2011-09-19 17:04:37 -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 09:43:10 -08:00

timeconst.pl

…

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

Make taskstats round statistics down to nearest 1k bytes/events

2011-09-19 17:10:57 -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

sysctl kernel: Remove binary sysctl logic

2009-11-12 02:04:55 -08:00

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

perf, x86: P4 PMU - Introduce event alias feature

2011-07-14 17:25:04 -04:00

workqueue_sched.h

workqueue: implement concurrency managed dynamic worker pool

2010-06-29 10:07:14 +02:00

workqueue.c

workqueue: lock cwq access in drain_workqueue

2011-09-14 18:09:38 -07:00