Oleg Nesterov 6405f7f467 ptrace_stop: fix the race with ptrace detach+attach ... If the tracer went away (may_ptrace_stop() failed), ptrace_stop() drops tasklist and then changes the ->state from TASK_TRACED to TASK_RUNNING. This can fool another tracer which attaches to us in between. Change the ->state under tasklist_lock to ensure that ptrace_check_attach() can't wrongly succeed. Also, remove the unnecessary mb(). Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Acked-by: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-02-08 09:22:26 -08:00
..
irq	genirq: stackdump after the "Trying to free already-free IRQ" message	2008-01-30 13:33:24 +01:00
power	PM: documentation cleanups	2008-02-07 01:27:17 -05:00
time	time: fix sysfs_show_{available,current}_clocksources() buffer overflow problem	2008-02-06 10:41:03 -08:00
.gitignore
acct.c
audit_tree.c
audit.c	[AUDIT] ratelimit printk messages audit	2008-02-01 14:25:04 -05:00
audit.h
auditfilter.c	[AUDIT] make audit=0 really stop audit messages	2008-02-01 14:24:33 -05:00
auditsc.c	[AUDIT] create context if auditing was ever enabled	2008-02-01 14:24:45 -05:00
backtracetest.c	x86: add a simple backtrace test module	2008-01-30 13:33:08 +01:00
capability.c	Add 64-bit capability support to the kernel	2008-02-05 09:44:20 -08:00
cgroup_debug.c
cgroup.c	Handle pid namespaces in cgroups code	2008-02-07 08:42:22 -08:00
compat.c
configs.c
cpu.c
cpuset.c	proc: seqfile convert proc_pid_status to properly handle pid namespaces	2008-02-08 09:22:24 -08:00
delayacct.c
dma.c
exec_domain.c
exit.c	kill my_ptrace_child()	2008-02-08 09:22:26 -08:00
extable.c
fork.c	Memory controller: accounting setup	2008-02-07 08:42:18 -08:00
futex_compat.c	futex: Add bitset conditional wait/wakeup functionality	2008-02-01 17:45:14 +01:00
futex.c	futex: Add bitset conditional wait/wakeup functionality	2008-02-01 17:45:14 +01:00
hrtimer.c	timerfd: new timerfd API	2008-02-05 09:44:07 -08:00
itimer.c
kallsyms.c	remove support for un-needed _extratext section	2008-02-06 10:41:01 -08:00
Kconfig.hz
Kconfig.preempt
kexec.c	vmcoreinfo: add "VMCOREINFO_" to all the call for vmcoreinfo_append_str()	2008-02-07 08:42:25 -08:00
kfifo.c
kmod.c
kprobes.c	kprobes: kretprobe user entry-handler	2008-02-06 10:41:11 -08:00
ksysfs.c
kthread.c
latencytop.c
lockdep_internals.h
lockdep_proc.c
lockdep.c
Makefile	namespaces: cleanup the code managed with PID_NS option	2008-02-08 09:22:23 -08:00
marker.c
module.c	fix "modules: make module_address_lookup() safe"	2008-02-08 09:22:24 -08:00
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
notifier.c	kernel/notifier.c should #include <linux/reboot.h>	2008-02-06 10:41:02 -08:00
ns_cgroup.c
nsproxy.c	namespaces: move the IPC namespace under IPC_NS option	2008-02-08 09:22:23 -08:00
panic.c	ACPI: Taint kernel on ACPI table override (format corrected)	2008-02-06 22:07:51 -05:00
params.c	kernel/params.c: remove sparse-warning (different signedness)	2008-02-06 10:41:08 -08:00
pid_namespace.c	namespaces: cleanup the code managed with PID_NS option	2008-02-08 09:22:23 -08:00
pid.c	namespaces: cleanup the code managed with PID_NS option	2008-02-08 09:22:23 -08:00
pm_qos_params.c	pm qos infrastructure and interface	2008-02-05 09:44:22 -08:00
posix-cpu-timers.c
posix-timers.c	timerfd: new timerfd API	2008-02-05 09:44:07 -08:00
printk.c	printk.c: use unsigned ints instead of longs for logbuf index	2008-02-06 10:41:04 -08:00
profile.c
ptrace.c	ptrace_check_attach: remove unneeded ->signal != NULL check	2008-02-08 09:22:26 -08:00
rcuclassic.c
rcupdate.c
rcupreempt_trace.c
rcupreempt.c
rcutorture.c
relay.c	relay: nopage	2008-02-06 10:41:07 -08:00
res_counter.c	Memory controller improve user interface	2008-02-07 08:42:18 -08:00
resource.c
rtmutex_common.h
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rwsem.c
sched_debug.c
sched_fair.c	sched: let +nice tasks have smaller impact	2008-01-31 22:45:22 +01:00
sched_idletask.c
sched_rt.c
sched_stats.h
sched.c	Merge branch 'task_killable' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc	2008-02-01 11:45:47 +11:00
seccomp.c
signal.c	ptrace_stop: fix the race with ptrace detach+attach	2008-02-08 09:22:26 -08:00
softirq.c	time: track accurate idle time with tick_sched.idle_sleeptime	2008-01-30 13:30:04 +01:00
softlockup.c	debug: softlockup looping fix	2008-02-02 14:27:45 +11:00
spinlock.c	spinlock: lockbreak cleanup	2008-01-30 13:31:20 +01:00
srcu.c	make srcu_readers_active() static	2008-02-06 10:41:02 -08:00
stacktrace.c
stop_machine.c	stopmachine: semaphore to mutex	2008-02-06 10:41:08 -08:00
sys_ni.c	timerfd: new timerfd API	2008-02-05 09:44:07 -08:00
sys.c	kernel/sys.c: get rid of expensive divides in groups_sort()	2008-02-06 10:41:09 -08:00
sysctl_check.c	capabilities: introduce per-process capability bounding set	2008-02-05 09:44:20 -08:00
sysctl.c	hugetlb: add locking for overcommit sysctl	2008-02-08 09:22:23 -08:00
taskstats.c
test_kprobes.c	kprobes: kretprobe user entry-handler	2008-02-06 10:41:11 -08:00
time.c	speed up jiffies conversion functions if HZ==USER_HZ	2008-02-06 10:41:10 -08:00
timer.c	taskstats scaled time cleanup	2008-02-06 10:41:00 -08:00
tsacct.c
uid16.c
user_namespace.c	namespaces: cleanup the code managed with the USER_NS option	2008-02-08 09:22:23 -08:00
user.c	namespaces: cleanup the code managed with the USER_NS option	2008-02-08 09:22:23 -08:00
utsname_sysctl.c
utsname.c
wait.c
workqueue.c