Jason Baron b842f8faf6 jump label: Fix module __init section race ... Jump label uses is_module_text_address() to ensure that the module __init sections are valid before updating them. However, between the check for a valid module __init section and the subsequent jump label update, the module's __init section could be freed out from under us. We fix this potential race by adding a notifier callback to the MODULE_STATE_LIVE state. This notifier is called *after* the __init section has been run but before it is going to be freed. In the callback, the jump label code zeros the key value for any __init jump code within the module, and we add a check for a non-zero key value when we update jump labels. In this way we require no additional data structures. Thanks to Mathieu Desnoyers for pointing out this race condition. Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Jason Baron <jbaron@redhat.com> LKML-Reference: <c6f037b7598777668025ceedd9294212fd95fa34.1285965957.git.jbaron@redhat.com> [ Renamed remove_module_init() to remove_jump_label_module_init() as suggested by Masami Hiramatsu. ] Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2010-10-28 09:17:02 -04:00
..
debug	kdb,debug_core: adjust master cpu switch logic against new debug_core locking	2010-10-22 15:34:13 -05:00
gcov	llseek: automatically add .llseek fop	2010-10-15 15:53:27 +02:00
irq	/proc/stat: fix scalability of irq sum of all cpu	2010-10-27 18:03:13 -07:00
power	use clear_page()/copy_page() in favor of memset()/memcpy() on whole pages	2010-10-26 16:52:13 -07:00
time
trace	Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-10-27 18:48:00 -07:00
.gitignore
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: add check for strcpy destination string overflow	2010-10-27 18:03:09 -07:00
cgroup_freezer.c	cgroup_freezer: update_freezer_state() does incorrect state transitions	2010-10-27 18:03:08 -07:00
compat.c
configs.c	llseek: automatically add .llseek fop	2010-10-15 15:53:27 +02:00
cpu.c
cpuset.c	security: remove unused parameter from security_task_setscheduler()	2010-10-21 10:12:44 +11:00
cred.c	signals: move cred_guard_mutex from task_struct to signal_struct	2010-10-27 18:03:12 -07:00
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	exit: add lock context annotation on find_new_reaper()	2010-10-27 18:03:13 -07:00
extable.c
fork.c	signals: move cred_guard_mutex from task_struct to signal_struct	2010-10-27 18:03:12 -07:00
freezer.c
futex.c	new helper: ihold()	2010-10-25 21:26:11 -04:00
futex_compat.c	futex: Change 3rd arg of fetch_robust_entry() to unsigned int*	2010-09-18 12:19:21 +02:00
groups.c
hrtimer.c	hrtimer: Preserve timer state in remove_hrtimer()	2010-10-14 13:29:59 +02:00
hung_task.c
hw_breakpoint.c	perf, hw_breakpoint: Fix crash in hw_breakpoint creation	2010-10-18 19:58:55 +02:00
irq_work.c	irq_work: Add generic hardirq context callbacks	2010-10-18 19:58:50 +02:00
itimer.c
jump_label.c	jump label: Fix module __init section race	2010-10-28 09:17:02 -04:00
kallsyms.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c	use clear_page()/copy_page() in favor of memset()/memcpy() on whole pages	2010-10-26 16:52:13 -07:00
kfifo.c	kfifo: fix scatterlist usage	2010-10-01 10:50:58 -07:00
kmod.c
kprobes.c	Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-10-27 18:48:00 -07:00
ksysfs.c
kthread.c
latencytop.c
lockdep.c	lockdep: Check the depth of subclass	2010-10-18 18:44:26 +02:00
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
Makefile	Merge branch 'core-memblock-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-10-21 18:52:11 -07:00
module.c	(trivial) Fix compiler warning in kernel/modules.c	2010-10-27 20:33:05 +10:30
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
notifier.c
ns_cgroup.c	cgroup: notify ns_cgroup deprecated	2010-10-27 18:03:09 -07:00
nsproxy.c
padata.c
panic.c
params.c
perf_event.c	perf_events: Fix for transaction recovery in group_sched_in()	2010-10-22 14:18:27 +02:00
pid.c
pid_namespace.c
pm_qos_params.c	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2010-10-24 13:41:39 -07:00
posix-cpu-timers.c
posix-timers.c
printk.c	printk: change type of 'boot_delay' to int *	2010-10-26 16:52:16 -07:00
profile.c	llseek: automatically add .llseek fop	2010-10-15 15:53:27 +02:00
ptrace.c	signals: move cred_guard_mutex from task_struct to signal_struct	2010-10-27 18:03:12 -07:00
range.c
rcupdate.c	Merge branch 'rcu/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu into core/rcu	2010-10-07 09:43:11 +02:00
rcutiny.c
rcutiny_plugin.h
rcutorture.c	rcu: fix sparse errors in rcutorture.c	2010-09-23 09:16:42 -07:00
rcutree.c	rcu: using ACCESS_ONCE() to observe the jiffies_stall/rnp->qsmask value	2010-10-07 10:41:06 -07:00
rcutree.h	rcu: Add tracing data to support queueing models	2010-09-23 09:16:53 -07:00
rcutree_plugin.h
rcutree_trace.c	rcu: Add tracing data to support queueing models	2010-09-23 09:16:53 -07:00
relay.c
res_counter.c
resource.c	kernel/resource.c: handle reinsertion of an already-inserted resource	2010-10-27 18:03:18 -07:00
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c	rtmutex-tester: make it build without BKL	2010-10-19 11:29:56 +02:00
rtmutex.c
rtmutex.h
rtmutex_common.h
rwsem.c
sched.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-10-21 12:55:43 -07:00
sched_clock.c
sched_cpupri.c
sched_cpupri.h
sched_debug.c
sched_fair.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-10-21 12:55:43 -07:00
sched_features.h	sched: Remove irq time from available CPU power	2010-10-18 20:52:27 +02:00
sched_idletask.c
sched_rt.c	sched: Do not account irq time to current task	2010-10-18 20:52:26 +02:00
sched_stats.h
sched_stoptask.c	sched: Create special class for stop/migrate work	2010-10-18 18:41:58 +02:00
seccomp.c
semaphore.c
signal.c	signals: annotate lock context change on ptrace_stop()	2010-10-27 18:03:12 -07:00
smp.c	Typedef SMP call function pointer	2010-10-27 17:28:36 +01:00
softirq.c	Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-10-27 18:48:00 -07:00
spinlock.c
srcu.c	kernel: Remove undead ifdef CONFIG_DEBUG_LOCK_ALLOC	2010-09-23 09:14:51 -07:00
stacktrace.c
stop_machine.c	stop_machine: convert cpu notifier to return encapsulate errno value	2010-10-26 16:52:15 -07:00
sys.c
sys_ni.c	powerpc: define a compat_sys_recv cond_syscall	2010-09-23 17:03:55 +10:00
sysctl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2010-10-26 17:58:44 -07:00
sysctl_binary.c
sysctl_check.c	sysctl: min/max bounds are optional	2010-10-15 14:42:24 -07:00
taskstats.c	taskstats: split fill_pid function	2010-10-27 18:03:17 -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
timeconst.pl
timer.c	irq_work: Add generic hardirq context callbacks	2010-10-18 19:58:50 +02:00
tracepoint.c	jump_label: Use more consistent naming	2010-10-18 19:58:56 +02:00
tsacct.c	taskstats: use real microsecond granularity for CPU times	2010-10-27 18:03:17 -07:00
uid16.c
up.c
user-return-notifier.c
user.c	kernel/user.c: add lock release annotation on free_user()	2010-10-26 16:52:15 -07:00
user_namespace.c
utsname.c
utsname_sysctl.c
wait.c	docbook: add more wait/wake/completion to device-drivers docbook	2010-10-26 17:32:41 -07:00
watchdog.c	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-10-21 12:54:49 -07:00
workqueue.c	workqueues: s/ON_STACK/ONSTACK/	2010-10-26 16:52:14 -07:00
workqueue_sched.h