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
events
gcov
irq
power
time	Revert "clockevents: Set noop handler in clockevents_exchange_device()"	2011-12-30 13:24:40 -08:00
trace
.gitignore
acct.c
async.c
audit_tree.c
audit_watch.c
audit.c
audit.h
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
cgroup_freezer.c
cgroup.c	cgroups: fix a css_set not found bug in cgroup_attach_proc	2011-12-19 09:09:09 -08:00
compat.c
configs.c
cpu_pm.c
cpu.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
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
freezer.c
futex_compat.c
futex.c	futex: Fix uninterruptible loop due to gate_area	2011-12-31 11:48:28 -08:00
groups.c
hrtimer.c
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
kallsyms.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c
kfifo.c
kmod.c
kprobes.c
ksysfs.c
kthread.c
latencytop.c
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
lockdep.c
Makefile
module.c
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
notifier.c
nsproxy.c
padata.c
panic.c
params.c
pid_namespace.c
pid.c
posix-cpu-timers.c
posix-timers.c
printk.c
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_plugin.h
rcutiny.c
rcutorture.c
rcutree_plugin.h
rcutree_trace.c
rcutree.c
rcutree.h
relay.c
res_counter.c
resource.c
rtmutex_common.h
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rwsem.c
sched_autogroup.c
sched_autogroup.h
sched_clock.c
sched_cpupri.c
sched_cpupri.h
sched_debug.c
sched_fair.c
sched_features.h
sched_idletask.c
sched_rt.c
sched_stats.h
sched_stoptask.c
sched.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
sys_ni.c
sys.c
sysctl_binary.c	binary_sysctl(): fix memory leak	2011-12-20 10:25:04 -08:00
sysctl_check.c
sysctl.c
taskstats.c
test_kprobes.c
time.c
timeconst.pl
timer.c
tracepoint.c
tsacct.c
uid16.c
up.c
user_namespace.c
user-return-notifier.c
user.c
utsname_sysctl.c
utsname.c
wait.c
watchdog.c
workqueue_sched.h
workqueue.c