Andi Kleen b45c6e76bc kernel/signal.c: fix kernel information leak with print-fatal-signals=1 ... When print-fatal-signals is enabled it's possible to dump any memory reachable by the kernel to the log by simply jumping to that address from user space. Or crash the system if there's some hardware with read side effects. The fatal signals handler will dump 16 bytes at the execution address, which is fully controlled by ring 3. In addition when something jumps to a unmapped address there will be up to 16 additional useless page faults, which might be potentially slow (and at least is not very efficient) Fortunately this option is off by default and only there on i386. But fix it by checking for kernel addresses and also stopping when there's a page fault. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Oleg Nesterov <oleg@redhat.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2010-01-11 09:34:05 -08:00
..
gcov	microblaze: Enable GCOV_PROFILE_ALL	2009-09-21 14:29:21 +02:00
irq	genirq: Convert irq_desc.lock to raw_spinlock	2009-12-14 23:55:33 +01:00
power	vt: introduce and use vt_kmsg_redirect() function	2009-12-15 08:53:28 -08:00
time	Revert "time: Remove xtime_cache"	2009-12-22 14:10:37 -08:00
trace	Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-31 11:52:01 -08:00
.gitignore
acct.c	bsdacct: fix uid/gid misreporting	2009-12-15 08:53:10 -08:00
async.c
audit_tree.c	fix more leaks in audit_tree.c tag_chunk()	2009-12-19 09:27:43 -08:00
audit_watch.c	Audit: reorganize struct audit_watch to save 8 bytes	2009-09-24 03:50:25 -04:00
audit.c	Audit: send signal info if selinux is disabled	2009-09-24 03:50:26 -04:00
audit.h
auditfilter.c
auditsc.c	Sanitize f_flags helpers	2009-12-22 12:27:34 -05:00
backtracetest.c
bounds.c	kbuild: move bounds.h to include/generated	2009-12-12 13:08:14 +01:00
capability.c	remove CONFIG_SECURITY_FILE_CAPABILITIES compile option	2009-11-24 15:06:47 +11:00
cgroup_freezer.c	cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time	2009-09-24 07:20:58 -07:00
cgroup.c	cgroups: fix 2.6.32 regression causing BUG_ON() in cgroup_diput()	2010-01-11 09:34:05 -08:00
compat.c
configs.c
cpu.c	sched: Fix set_cpu_active() in cpu_down()	2009-12-16 19:01:53 +01:00
cpuset.c	sched: Fix balance vs hotplug race	2009-12-06 21:10:56 +01:00
cred-internals.h
cred.c	creds_are_invalid() needs to be exported for use by modules:	2009-09-23 11:02:26 -07:00
delayacct.c	headers: taskstats_kern.h trim	2009-09-18 09:48:52 -07:00
dma.c
exec_domain.c
exit.c	do_wait() optimization: do not place sub-threads on task_struct->children list	2009-12-17 15:45:31 -08:00
extable.c
fork.c	do_wait() optimization: do not place sub-threads on task_struct->children list	2009-12-17 15:45:31 -08:00
freezer.c
futex_compat.c
futex.c	rtmutes: Convert rtmutex.lock to raw_spinlock	2009-12-14 23:55:33 +01:00
groups.c
hrtimer.c	hrtimers: Convert to raw_spinlocks	2009-12-14 23:55:34 +01:00
hung_task.c	softlockup: Fix hung_task_check_count sysctl	2009-11-27 06:21:57 +01:00
hw_breakpoint.c	Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-31 11:52:01 -08:00
itimer.c	itimers: Fix racy writes to cpu_itimer fields	2009-11-18 16:32:12 +01:00
kallsyms.c	hw-breakpoints: Fix broken hw-breakpoint sample module	2009-11-10 11:23:29 +01:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks	mutex: Better control mutex adaptive spinning config	2009-12-03 11:50:11 +01:00
Kconfig.preempt
kexec.c	Merge branch 'for-33' of git://repo.or.cz/linux-kbuild	2009-12-17 07:23:42 -08:00
kfifo.c	kfifo: add record handling functions	2009-12-22 14:17:56 -08:00
kgdb.c	kgdb: Always process the whole breakpoint list on activate or deactivate	2009-12-11 08:43:20 -06:00
kmod.c	kmod: fix resource leak in call_usermodehelper_pipe()	2010-01-11 09:34:04 -08:00
kprobes.c	kprobes: Fix distinct type warning	2009-12-28 10:25:31 +01:00
ksysfs.c	kexec: premit reduction of the reserved memory size	2009-12-16 07:20:13 -08:00
kthread.c	sched: Move kthread_bind() back to kthread.c	2009-12-16 19:01:57 +01:00
latencytop.c
lockdep_internals.h
lockdep_proc.c	seq_file: constify seq_operations	2009-09-23 07:39:29 -07:00
lockdep_states.h
lockdep.c	locking: Convert __raw_spin* functions to arch_spin*	2009-12-14 23:55:32 +01:00
Makefile	Merge branch 'kvm-updates/2.6.33' of git://git.kernel.org/pub/scm/virt/kvm/kvm	2009-12-08 08:02:38 -08:00
module.c	modules: Skip empty sections when exporting section notes	2010-01-06 01:11:29 -08:00
mutex-debug.c	headers: remove sched.h from interrupt.h	2009-10-11 11:20:58 -07:00
mutex-debug.h	locking: Implement new raw_spinlock	2009-12-14 23:55:32 +01:00
mutex.c	mutex: Better control mutex adaptive spinning config	2009-12-03 11:50:11 +01:00
mutex.h
notifier.c	kprobes: Fix to add __kprobes to notify_die	2009-08-30 03:08:26 +02:00
ns_cgroup.c	cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time	2009-09-24 07:20:58 -07:00
nsproxy.c
panic.c	Merge git://git.infradead.org/mtd-2.6	2009-12-16 10:23:43 -08:00
params.c	tree-wide: convert open calls to remove spaces to skip_spaces() lib function	2009-12-15 08:53:32 -08:00
perf_event.c	Merge branch 'perf-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-31 11:56:24 -08:00
pid_namespace.c	pidns: deny CLONE_PARENT|CLONE_NEWPID combination	2009-09-24 07:21:04 -07:00
pid.c	pid: reduce code size by using a pointer to iterate over array	2009-12-16 07:20:12 -08:00
pm_qos_params.c	pm_qos: clean up racy global "name" variable	2009-10-14 15:31:10 +02:00
posix-cpu-timers.c	posix-cpu-timers: optimize and document timer_create callback	2009-11-18 12:36:05 +01:00
posix-timers.c	time: Introduce CLOCK_REALTIME_COARSE	2009-08-21 21:43:46 +02:00
printk.c	printk: fix new kernel-doc warnings	2009-12-17 15:45:32 -08:00
profile.c	kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file	2009-09-20 20:15:40 +02:00
ptrace.c	ptrace: __ptrace_detach: do __wake_up_parent() if we reap the tracee	2009-09-24 07:20:59 -07:00
rcupdate.c	rcu: Re-arrange code to reduce #ifdef pain	2009-11-22 18:58:16 +01:00
rcutiny.c	rcu: Eliminate unneeded function wrapping	2009-11-22 18:58:16 +01:00
rcutorture.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2009-12-14 09:58:24 -08:00
rcutree_plugin.h	rcu: Add expedited grace-period support for preemptible RCU	2009-12-03 11:35:25 +01:00
rcutree_trace.c	rcu: Add expedited grace-period support for preemptible RCU	2009-12-03 11:35:25 +01:00
rcutree.c	rcu: Add expedited grace-period support for preemptible RCU	2009-12-03 11:35:25 +01:00
rcutree.h	rcu: Add expedited grace-period support for preemptible RCU	2009-12-03 11:35:25 +01:00
relay.c	const: constify remaining pipe_buf_operations	2009-12-16 07:20:05 -08:00
res_counter.c	memcg: some modification to softlimit under hierarchical memory reclaim.	2009-10-01 16:11:13 -07:00
resource.c	resources: fix call to alignf() in allocate_resource()	2009-12-21 10:42:29 -08:00
rtmutex_common.h
rtmutex-debug.c	sched: Convert pi_lock to raw_spinlock	2009-12-14 23:55:33 +01:00
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c	rtmutes: Convert rtmutex.lock to raw_spinlock	2009-12-14 23:55:33 +01:00
rtmutex.h
rwsem.c
sched_clock.c	sched: Fix cpu_clock() in NMIs, on !CONFIG_HAVE_UNSTABLE_SCHED_CLOCK	2009-12-15 09:04:36 +01:00
sched_cpupri.c	sched: Convert cpupri lock to raw_spinlock	2009-12-14 23:55:33 +01:00
sched_cpupri.h	sched: Convert cpupri lock to raw_spinlock	2009-12-14 23:55:33 +01:00
sched_debug.c	sched: Convert rq->lock to raw_spinlock	2009-12-14 23:55:33 +01:00
sched_fair.c	sched: Remove the cfs_rq dependency from set_task_cpu()	2009-12-16 19:01:58 +01:00
sched_features.h	sched: Discard some old bits	2009-12-09 10:03:07 +01:00
sched_idletask.c	sched: Restore printk sanity	2009-12-20 19:05:02 +01:00
sched_rt.c	sched: Add pre and post wakeup hooks	2009-12-16 19:01:58 +01:00
sched_stats.h
sched.c	sched: Revert 738d2be, simplify set_task_cpu()	2009-12-23 10:04:10 +01:00
seccomp.c
semaphore.c
signal.c	kernel/signal.c: fix kernel information leak with print-fatal-signals=1	2010-01-11 09:34:05 -08:00
slow-work-debugfs.c	SLOW_WORK: Move slow_work's proc file to debugfs	2009-12-01 08:20:31 -08:00
slow-work.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6	2009-12-08 07:38:50 -08:00
slow-work.h	SLOW_WORK: Move slow_work's proc file to debugfs	2009-12-01 08:20:31 -08:00
smp.c	Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-15 09:02:01 -08:00
softirq.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2009-12-14 09:58:24 -08:00
softlockup.c	percpu: make percpu symbols under kernel/ and mm/ unique	2009-10-29 22:34:13 +09:00
spinlock.c	locking: Cleanup the name space completely	2009-12-14 23:55:33 +01:00
srcu.c	rcu: Add synchronize_srcu_expedited()	2009-10-26 09:40:30 +01:00
stacktrace.c
stop_machine.c
sys_ni.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6	2009-12-08 07:55:01 -08:00
sys.c	Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-12-19 09:47:34 -08:00
sysctl_binary.c	SYSCTL: Print binary sysctl warnings (nearly) only once	2009-12-23 21:00:20 +01:00
sysctl_check.c	ipv4 05/05: add sysctl to accept packets with local source addresses	2009-12-03 12:14:38 -08:00
sysctl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6	2009-12-17 16:58:26 -08:00
taskstats.c
test_kprobes.c
time.c	Revert "time: Remove xtime_cache"	2009-12-22 14:10:37 -08:00
timeconst.pl
timer.c	timers: Remove duplicate setting of new_base in __mod_timer()	2009-12-17 01:30:49 +01:00
tracepoint.c	trivial: fix typo "to to" in multiple files	2009-09-21 15:14:55 +02:00
tsacct.c
uid16.c	headers: utsname.h redux	2009-09-23 18:13:10 -07:00
up.c
user_namespace.c
user-return-notifier.c	core: Clean up user return notifers use of per_cpu	2009-12-02 10:22:59 +01:00
user.c	uids: Prevent tear down race	2009-11-02 16:02:39 +01:00
utsname_sysctl.c	sysctl kernel: Remove binary sysctl logic	2009-11-12 02:04:55 -08:00
utsname.c
wait.c
workqueue.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2009-12-10 09:35:44 -08:00