Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Thomas Gleixner d0725992c8 futex: Fix the write access fault problem for real ... commit 64d1304a64 (futex: setup writeable mapping for futex ops which modify user space data) did address only half of the problem of write access faults. The patch was made on two wrong assumptions: 1) access_ok(VERIFY_WRITE,...) would actually check write access. On x86 it does _NOT_. It's a pure address range check. 2) a RW mapped region can not go away under us. That's wrong as well. Nobody can prevent another thread to call mprotect(PROT_READ) on that region where the futex resides. If that call hits between the get_user_pages_fast() verification and the actual write access in the atomic region we are toast again. The solution is to not rely on access_ok and get_user() for any write access related fault on private and shared futexes. Instead we need to fault it in with verification of write access. There is no generic non destructive write mechanism which would fault the user page in trough a #PF, but as we already know that we will fault we can as well call get_user_pages() directly and avoid the #PF overhead. If get_user_pages() returns -EFAULT we know that we can not fix it anymore and need to bail out to user space. Remove a bunch of confusing comments on this issue as well. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@kernel.org		2009-06-24 21:27:35 +02:00
..
gcov	gcov: enable GCOV_PROFILE_ALL for x86_64	2009-06-18 13:03:58 -07:00
irq	Merge branch 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-06-20 11:30:01 -07:00
power	mm, PM/Freezer: Disable OOM killer when tasks are frozen	2009-06-16 19:47:40 -07:00
time	Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-06-20 10:51:44 -07:00
trace	Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-06-20 10:56:46 -07:00
.gitignore
acct.c
async.c	async: Fix lack of boot-time console due to insufficient synchronization	2009-06-08 12:31:53 -07:00
audit.c	Fix rule eviction order for AUDIT_DIR	2009-06-24 00:02:38 -04:00
audit.h	Fix rule eviction order for AUDIT_DIR	2009-06-24 00:02:38 -04:00
audit_tree.c	Fix rule eviction order for AUDIT_DIR	2009-06-24 00:02:38 -04:00
audit_watch.c	Audit: clean up all op= output to include string quoting	2009-06-24 00:00:52 -04:00
auditfilter.c	Audit: clean up all op= output to include string quoting	2009-06-24 00:00:52 -04:00
auditsc.c	Fix rule eviction order for AUDIT_DIR	2009-06-24 00:02:38 -04:00
backtracetest.c
bounds.c
capability.c
cgroup.c	cgroups: forbid noprefix if mounting more than just cpuset subsystem	2009-06-18 13:03:46 -07:00
cgroup_debug.c	debug cgroup: remove unneeded cgroup_lock	2009-04-02 19:04:54 -07:00
cgroup_freezer.c
compat.c	signals: implement sys_rt_tgsigqueueinfo	2009-04-30 19:24:24 +02:00
configs.c
cpu.c	mm/init: cpu_hotplug_init() must be initialized before SLAB	2009-06-22 21:18:12 -07:00
cpuset.c	cpuset,mm: update tasks' mems_allowed in time	2009-06-16 19:47:31 -07:00
cred-internals.h
cred.c	CRED: Rename cred_exec_mutex to reflect that it's a guard against ptrace	2009-05-11 08:15:36 +10:00
delayacct.c
dma-coherent.c
dma.c
exec_domain.c	Get rid of indirect include of fs_struct.h	2009-03-31 23:00:27 -04:00
exit.c	ptrace: wait_task_zombie: do not account traced sub-threads	2009-06-19 16:46:06 -07:00
extable.c	Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-04-05 11:04:19 -07:00
fork.c	copy_process(): remove the unneeded clear_tsk_thread_flag(TIF_SIGPENDING)	2009-06-18 13:03:52 -07:00
freezer.c
futex.c	futex: Fix the write access fault problem for real	2009-06-24 21:27:35 +02:00
futex_compat.c
groups.c	groups: move code to kernel/groups.c	2009-06-16 19:47:48 -07:00
hrtimer.c	Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6	2009-06-17 09:46:33 -07:00
hung_task.c
itimer.c
kallsyms.c	kernel/kallsyms.c: replace deprecated __initcall with device_initcall and fix whitespace	2009-06-09 22:37:52 +02:00
Kconfig.freezer
Kconfig.hz
Kconfig.preempt
kexec.c	PM core: rename suspend and resume functions	2009-06-12 21:32:31 +02:00
kfifo.c	kernel/kfifo.c: replace conditional test with is_power_of_2()	2009-06-16 19:47:47 -07:00
kgdb.c	sysrq, intel_fb: fix sysrq g collision	2009-05-15 07:56:24 -05:00
kmod.c	kmod: Release sub_info on cred allocation failure.	2009-05-26 12:11:19 -07:00
kprobes.c	kprobes: fix to use text_mutex around arm/disarm kprobe	2009-05-08 16:23:48 -07:00
ksysfs.c
kthread.c	kthreads: rework kthread_stop()	2009-06-18 13:03:54 -07:00
latencytop.c
lockdep.c	Merge branch 'linus' into tracing/core	2009-05-07 11:17:34 +02:00
lockdep_internals.h	lockdep: increase MAX_LOCKDEP_ENTRIES and MAX_LOCKDEP_CHAINS	2009-05-12 19:59:52 +02:00
lockdep_proc.c
lockdep_states.h
Makefile	audit: seperate audit inode watches into a subfile	2009-06-23 23:50:59 -04:00
marker.c
module.c	kernel: constructor support	2009-06-18 13:03:57 -07:00
mutex-debug.c
mutex-debug.h
mutex.c	Merge branch 'linus' into perfcounters/core	2009-06-11 17:55:42 +02:00
mutex.h
notifier.c
ns_cgroup.c	cgroups: relax ns_can_attach checks to allow attaching to grandchild cgroups	2009-04-02 19:04:53 -07:00
nsproxy.c	nsproxy: extract create_nsproxy()	2009-06-18 13:03:56 -07:00
panic.c	Fix caller information for warn_slowpath_null	2009-05-16 13:41:28 -07:00
params.c	module_param: allow 'bool' module_params to be bool, not just int.	2009-06-12 21:46:58 +09:30
perf_counter.c	perf_counter: Push perf_sample_data through the swcounter code	2009-06-20 12:30:30 +02:00
pid.c	pids: clean up find_task_by_pid variants	2009-06-18 13:03:55 -07:00
pid_namespace.c	pidns: rewrite copy_pid_ns()	2009-06-18 13:03:55 -07:00
pm_qos_params.c
posix-cpu-timers.c	kernel/posix-cpu-timers.c: fix sparse warning	2009-04-30 08:08:31 +02:00
posix-timers.c
printk.c	printk: Add KERN_DEFAULT printk log-level	2009-06-16 11:02:28 -07:00
profile.c	page allocator: do not check NUMA node ID when the caller knows the node is valid	2009-06-16 19:47:32 -07:00
ptrace.c	ptrace: don't take tasklist to get/set ->last_siginfo	2009-06-18 13:03:52 -07:00
rcuclassic.c	kmemtrace, rcu: fix linux/rcutree.h and linux/rcuclassic.h dependencies	2009-04-03 12:23:02 +02:00
rcupdate.c	RCU: Don't try and predeclare inline funcs as it upsets some versions of gcc	2009-04-15 13:55:14 -07:00
rcupreempt.c	rcu: rcu_sched_grace_period(): kill the bogus flush_signals()	2009-05-05 20:28:05 +02:00
rcupreempt_trace.c
rcutorture.c	cpumask: convert rcutorture.c	2009-03-30 22:05:16 +10:30
rcutree.c	rcu: Add __rcu_pending tracing to hierarchical RCU	2009-04-14 11:33:43 +02:00
rcutree.h	kmemtrace, rcu: fix rcu_tree_trace.c data structure dependencies	2009-04-03 12:23:03 +02:00
rcutree_trace.c	rcu: Add __rcu_pending tracing to hierarchical RCU	2009-04-14 11:33:43 +02:00
relay.c	Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-04-05 11:04:19 -07:00
res_counter.c	memcg: add interface to reset limits	2009-06-18 13:03:48 -07:00
resource.c	Remove 'recurse into child resources' logic from 'reserve_region_with_split()'	2009-04-18 21:44:24 -07:00
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c	trivial: fix ETIMEOUT -> ETIMEDOUT typos	2009-06-12 18:01:50 +02:00
rtmutex.h
rtmutex_common.h	rt_mutex: add proxy lock routines	2009-04-06 11:14:02 +02:00
rwsem.c
sched.c	Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-06-20 11:29:32 -07:00
sched_clock.c	sched: Fix fallback sched_clock()'s offset when using jiffies	2009-05-09 10:08:19 +02:00
sched_cpupri.c	sched: Remove unneeded __ref tag	2009-06-17 16:08:04 +02:00
sched_cpupri.h	cpumask: remove cpumask_t from core	2009-03-30 22:05:17 +10:30
sched_debug.c	sched: Hide runqueues from direct refer at source code level	2009-06-17 18:29:42 +02:00
sched_fair.c	sched: Fix out of scope variable access in sched_slice()	2009-06-17 18:37:54 +02:00
sched_features.h	Merge branch 'locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-03-30 17:17:35 -07:00
sched_idletask.c	sched, timers: move calc_load() to scheduler	2009-05-15 15:32:45 +02:00
sched_rt.c	cpumask: alloc zeroed cpumask for static cpumask_var_ts	2009-06-09 22:30:27 +09:30
sched_stats.h	sched: remove unused fields from struct rq	2009-03-24 23:16:51 +01:00
seccomp.c
semaphore.c
signal.c	ptrace: do_notify_parent_cldstop: fix the wrong ->nsproxy usage	2009-06-18 13:03:52 -07:00
slow-work.c	slow-work: use round_jiffies() for thread pool's cull and OOM timers	2009-06-16 19:47:49 -07:00
smp.c	cpumask: alloc zeroed cpumask for static cpumask_var_ts	2009-06-09 22:30:27 +09:30
softirq.c	softirq: introduce statistics for softirq	2009-06-18 13:03:40 -07:00
softlockup.c
spinlock.c	Allow rwlocks to re-enable interrupts	2009-04-02 19:05:11 -07:00
srcu.c
stacktrace.c
stop_machine.c	cpumask: remove cpumask_t from core	2009-03-30 22:05:17 +10:30
sys.c	groups: move code to kernel/groups.c	2009-06-16 19:47:48 -07:00
sys_ni.c
sysctl.c	sysctl.c: remove unused variable	2009-06-18 13:03:54 -07:00
sysctl_check.c
taskstats.c
test_kprobes.c
time.c
timeconst.pl
timer.c	Merge branch 'timers-for-linus-migration' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-06-15 10:06:19 -07:00
tracepoint.c
tsacct.c
uid16.c
up.c
user.c	sched: delayed cleanup of user_struct	2009-06-15 21:30:23 -07:00
user_namespace.c
utsname.c	utsns: extract creeate_uts_ns()	2009-06-18 13:03:55 -07:00
utsname_sysctl.c	proc_sysctl: use CONFIG_PROC_SYSCTL around ipc and utsname proc_handlers	2009-04-02 19:05:01 -07:00
wait.c	wait: don't use __wake_up_common()	2009-04-14 17:17:16 +02:00
workqueue.c	ftrace, workqueuetrace: make workqueue tracepoints use TRACE_EVENT macro	2009-06-02 01:10:40 +02:00