Oleg Nesterov 8a88951b58 ptrace: ensure JOBCTL_STOP_SIGMASK is not zero after detach ... 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> Cc: <stable@kernel.org> [3.1] Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-01-04 15:01:59 -08:00
..
debug	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
events	perf events: Fix ring_buffer_wakeup() brown paperbag bug	2011-12-14 08:44:53 +01:00
gcov	…
irq	genirq: Fix race condition when stopping the irq thread	2011-12-02 11:54:24 +01:00
power	PM / Hibernate: Do not leak memory in error/test code paths	2011-11-23 21:03:38 +01:00
time	Revert "clockevents: Set noop handler in clockevents_exchange_device()"	2011-12-30 13:24:40 -08:00
trace	ftrace: Fix hash record accounting bug	2011-12-05 13:28:47 -05:00
.gitignore	…
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	…
Kconfig.preempt	…
Makefile	…
acct.c	…
async.c	…
audit.c	…
audit.h	…
audit_tree.c	…
audit_watch.c	…
auditfilter.c	…
auditsc.c	…
backtracetest.c	…
bounds.c	…
capability.c	…
cgroup.c	cgroups: fix a css_set not found bug in cgroup_attach_proc	2011-12-19 09:09:09 -08:00
cgroup_freezer.c	cgroup_freezer: fix freezing groups with stopped tasks	2011-11-24 11:58:22 -08:00
compat.c	…
configs.c	…
cpu.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
cpu_pm.c	…
cpuset.c	cpusets: stall when updating mems_allowed for mempolicy or disjoint nodemask	2011-12-20 10:25:04 -08:00
crash_dump.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
cred.c	…
delayacct.c	…
dma.c	…
elfcore.c	…
exec_domain.c	…
exit.c	ptrace: partially fix the do_wait(WEXITED) vs EXIT_DEAD->EXIT_ZOMBIE race	2012-01-04 15:01:59 -08:00
extable.c	…
fork.c	writeback: remove vm_dirties and task->dirties	2011-11-17 20:49:06 +08:00
freezer.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
futex.c	futex: Fix uninterruptible loop due to gate_area	2011-12-31 11:48:28 -08:00
futex_compat.c	…
groups.c	…
hrtimer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2011-11-28 08:43:52 -08:00
hung_task.c	hung_task: fix false positive during vfork	2012-01-03 16:14:32 -08:00
irq_work.c	…
itimer.c	…
jump_label.c	jump_label: jump_label_inc may return before the code is patched	2011-12-05 13:28:46 -05:00
kallsyms.c	…
kexec.c	…
kfifo.c	…
kmod.c	…
kprobes.c	…
ksysfs.c	…
kthread.c	…
latencytop.c	…
lockdep.c	lockdep, kmemcheck: Annotate ->lock in lockdep_init_map()	2011-12-06 18:18:13 +01:00
lockdep_internals.h	…
lockdep_proc.c	…
lockdep_states.h	…
module.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
mutex-debug.c	…
mutex-debug.h	…
mutex.c	…
mutex.h	…
notifier.c	…
nsproxy.c	…
padata.c	…
panic.c	module,bug: Add TAINT_OOT_MODULE flag for modules not built in-tree	2011-11-07 07:54:42 +10:30
params.c	…
pid.c	…
pid_namespace.c	…
posix-cpu-timers.c	…
posix-timers.c	…
printk.c	printk: avoid double lock acquire	2011-12-09 07:50:28 -08:00
profile.c	…
ptrace.c	ptrace: ensure JOBCTL_STOP_SIGMASK is not zero after detach	2012-01-04 15:01:59 -08:00
range.c	…
rcu.h	…
rcupdate.c	…
rcutiny.c	…
rcutiny_plugin.h	…
rcutorture.c	…
rcutree.c	…
rcutree.h	…
rcutree_plugin.h	…
rcutree_trace.c	…
relay.c	…
res_counter.c	…
resource.c	…
rtmutex-debug.c	…
rtmutex-debug.h	…
rtmutex-tester.c	…
rtmutex.c	…
rtmutex.h	…
rtmutex_common.h	…
rwsem.c	…
sched.c	sched: Set the command name of the idle tasks in SMP kernels	2011-11-14 12:50:43 +01:00
sched_autogroup.c	…
sched_autogroup.h	…
sched_clock.c	…
sched_cpupri.c	…
sched_cpupri.h	…
sched_debug.c	…
sched_fair.c	sched: Fix select_idle_sibling() regression in selecting an idle SMT sibling	2011-12-16 09:44:58 +01:00
sched_features.h	sched, rt: Provide means of disabling cross-cpu bandwidth sharing	2011-11-14 12:50:40 +01:00
sched_idletask.c	…
sched_rt.c	sched, rt: Provide means of disabling cross-cpu bandwidth sharing	2011-11-14 12:50:40 +01:00
sched_stats.h	…
sched_stoptask.c	…
seccomp.c	…
semaphore.c	…
signal.c	ptrace: ensure JOBCTL_STOP_SIGMASK is not zero after detach	2012-01-04 15:01:59 -08:00
smp.c	…
softirq.c	…
spinlock.c	…
srcu.c	…
stacktrace.c	…
stop_machine.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
sys.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
sys_ni.c	Cross Memory Attach	2011-10-31 17:30:44 -07:00
sysctl.c	Merge branch 'akpm' (Andrew's incoming)	2011-10-31 17:46:07 -07:00
sysctl_binary.c	binary_sysctl(): fix memory leak	2011-12-20 10:25:04 -08:00
sysctl_check.c	…
taskstats.c	…
test_kprobes.c	…
time.c	…
timeconst.pl	…
timer.c	sys_getppid: add missing rcu_dereference	2011-12-09 07:50:29 -08:00
tracepoint.c	…
tsacct.c	…
uid16.c	…
up.c	…
user-return-notifier.c	…
user.c	…
user_namespace.c	…
utsname.c	…
utsname_sysctl.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
wait.c	…
watchdog.c	watchdog: move watchdog_*_all_cpus under CONFIG_SYSCTL	2011-10-31 17:30:53 -07:00
workqueue.c	…
workqueue_sched.h	…