Steven Rostedt 436fc28026 tracing: Fix returning of duplicate data after EOF in trace_pipe_raw ... The trace_pipe_raw handler holds a cached page from the time the file is opened to the time it is closed. The cached page is used to handle the case of the user space buffer being smaller than what was read from the ring buffer. The left over buffer is held in the cache so that the next read will continue where the data left off. After EOF is returned (no more data in the buffer), the index of the cached page is set to zero. If a user app reads the page again after EOF, the check in the buffer will see that the cached page is less than page size and will return the cached page again. This will cause reading the trace_pipe_raw again after EOF to return duplicate data, making the output look like the time went backwards but instead data is just repeated. The fix is to not reset the index right after all data is read from the cache, but to reset it after all data is read and more data exists in the ring buffer. Cc: stable <stable@kernel.org> Reported-by: Jeremy Eder <jeder@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2011-10-14 10:44:25 -04:00
..
debug	Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb	2011-08-01 13:39:40 -10:00
events	Merge commit 'v3.1-rc7' into perf/core	2011-09-26 12:54:28 +02:00
gcov	gcov: disable CONSTRUCTORS for UML	2011-07-26 16:49:45 -07:00
irq	irq: Fix check for already initialized irq_domain in irq_domain_add	2011-09-20 12:16:22 +02:00
power	PM / Domains: Fix build for CONFIG_PM_RUNTIME unset	2011-08-14 13:34:31 +02:00
time	alarmtimers: Avoid possible denial of service with high freq periodic timers	2011-08-10 10:26:09 -07:00
trace	tracing: Fix returning of duplicate data after EOF in trace_pipe_raw	2011-10-14 10:44:25 -04:00
.gitignore	…
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	…
Kconfig.preempt	sched: Isolate preempt counting in its own config option	2011-06-10 15:15:40 +02:00
Makefile	jump label: Reduce the cycle count by changing the link order	2011-08-05 23:57:33 +02:00
acct.c	…
async.c	async: Fixed an include coding style issue	2011-06-14 22:48:46 -04:00
audit.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
audit.h	…
audit_tree.c	audit_tree,rcu: Convert call_rcu(__put_tree) to kfree_rcu()	2011-07-20 14:10:11 -07:00
audit_watch.c	…
auditfilter.c	…
auditsc.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
backtracetest.c	…
bounds.c	…
capability.c	…
cgroup.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6	2011-07-27 19:26:38 -07:00
cgroup_freezer.c	cgroups: add per-thread subsystem callbacks	2011-05-26 17:12:34 -07:00
compat.c	Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6	2011-07-30 00:08:53 -07:00
configs.c	kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n	2011-07-25 20:57:15 -07:00
cpu.c	…
cpuset.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
crash_dump.c	…
cred.c	move RLIMIT_NPROC check from set_user() to do_execve_common()	2011-08-11 11:24:42 -07:00
delayacct.c	KVM: Steal time implementation	2011-07-14 12:59:14 +03:00
dma.c	…
elfcore.c	…
exec_domain.c	…
exit.c	ipc: introduce shm_rmid_forced sysctl	2011-07-26 16:49:44 -07:00
extable.c	…
fork.c	move RLIMIT_NPROC check from set_user() to do_execve_common()	2011-08-11 11:24:42 -07:00
freezer.c	…
futex.c	Merge branch 'linus' into core/urgent	2011-08-04 09:09:27 +02:00
futex_compat.c	…
groups.c	…
hrtimer.c	hrtimers: Fix typo causing erratic timers	2011-05-25 15:31:58 -07:00
hung_task.c	…
irq_work.c	…
itimer.c	…
jump_label.c	jump_label: Fix jump_label update for modules	2011-06-29 09:59:17 -04:00
kallsyms.c	…
kexec.c	treewide: Convert uses of struct resource to resource_size(ptr)	2011-06-10 14:55:36 +02:00
kfifo.c	…
kmod.c	Boot up with usermodehelper disabled	2011-08-03 22:03:29 -10:00
kprobes.c	kprobes: Return -ENOENT if probe point doesn't exist	2011-07-15 15:11:47 -04:00
ksysfs.c	…
kthread.c	cpuset: Fix cpuset_cpus_allowed_fallback(), don't update tsk->rt.nr_cpus_allowed	2011-05-28 17:02:57 +02:00
latencytop.c	…
lockdep.c	lockdep: Fix wrong assumption in match_held_lock	2011-08-09 11:57:35 +02:00
lockdep_internals.h	…
lockdep_proc.c	…
lockdep_states.h	…
module.c	Tracepoint: Dissociate from module mutex	2011-08-10 20:38:14 -04:00
mutex-debug.c	…
mutex-debug.h	…
mutex.c	lockdep, mutex: provide mutex_lock_nest_lock	2011-05-25 08:39:17 -07:00
mutex.h	…
notifier.c	notifiers: sys: move reboot notifiers into reboot.h	2011-07-25 20:57:14 -07:00
nsproxy.c	make sure that nsproxy_cache is initialized early enough	2011-07-20 01:44:07 -04:00
padata.c	…
panic.c	panic: panic=-1 for immediate reboot	2011-07-26 16:49:45 -07:00
params.c	module: add /sys/module/<name>/uevent files	2011-07-24 22:06:04 +09:30
pid.c	rcu: treewide: Do not use rcu_read_lock_held when calling rcu_dereference_check	2011-07-08 22:21:58 +02:00
pid_namespace.c	…
pm_qos_params.c	plist: Remove the need to supply locks to plist heads	2011-07-08 14:02:53 +02:00
posix-cpu-timers.c	posix-cpu-timers: Cure SMP wobbles	2011-09-30 14:07:06 +02:00
posix-timers.c	posix-timers: RCU conversion	2011-05-24 12:10:51 +02:00
printk.c	kernel/printk: do not turn off bootconsole in printk_late_init() if keep_bootcon	2011-08-25 16:25:34 -07:00
profile.c	kernel/profile.c: remove some duplicate code from profile_hits()	2011-05-26 17:12:37 -07:00
ptrace.c	ptrace: PTRACE_LISTEN forgets to unlock ->siglock	2011-09-25 11:02:00 -07:00
range.c	…
rcupdate.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
rcutiny.c	…
rcutiny_plugin.h	…
rcutorture.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
rcutree.c	rcu: Prevent RCU callbacks from executing before scheduler initialized	2011-07-13 08:17:56 -07:00
rcutree.h	rcu: Move RCU_BOOST #ifdefs to header file	2011-06-16 16:12:05 -07:00
rcutree_plugin.h	softirq,rcu: Inform RCU of irq_exit() activity	2011-07-20 10:50:12 -07:00
rcutree_trace.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
relay.c	…
res_counter.c	…
resource.c	Resource: fix wrong resource window calculation	2011-09-29 20:04:34 -07:00
rtmutex-debug.c	…
rtmutex-debug.h	…
rtmutex-tester.c	…
rtmutex.c	plist: Remove the need to supply locks to plist heads	2011-07-08 14:02:53 +02:00
rtmutex.h	…
rtmutex_common.h	…
rwsem.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
sched.c	posix-cpu-timers: Cure SMP wobbles	2011-09-30 14:07:06 +02:00
sched_autogroup.c	…
sched_autogroup.h	sched: Skip autogroup when looking for all rt sched groups	2011-07-01 10:39:08 +02:00
sched_clock.c	…
sched_cpupri.c	…
sched_cpupri.h	…
sched_debug.c	…
sched_fair.c	sched: Cleanup duplicate local variable in [enqueue|dequeue]_task_fair	2011-07-22 12:47:22 +02:00
sched_features.h	Merge branch 'kvm-updates/3.1' of git://git.kernel.org/pub/scm/virt/kvm/kvm	2011-07-24 09:07:03 -07:00
sched_idletask.c	…
sched_rt.c	sched/rt: Migrate equal priority tasks to available CPUs	2011-09-18 13:48:56 +02:00
sched_stats.h	sched: More sched_domain iterations fixes	2011-05-28 17:02:54 +02:00
sched_stoptask.c	…
seccomp.c	…
semaphore.c	…
signal.c	signals: sys_ssetmask/sys_rt_sigsuspend should use set_current_blocked()	2011-07-27 12:53:36 -07:00
smp.c	generic-ipi: Fix kexec boot crash by initializing call_single_queue before enabling interrupts	2011-06-17 10:17:12 +02:00
softirq.c	softirq,rcu: Inform RCU of irq_exit() activity	2011-07-20 10:50:12 -07:00
spinlock.c	…
srcu.c	…
stacktrace.c	stack_trace: Add weak save_stack_trace_regs()	2011-06-14 22:48:52 -04:00
stop_machine.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
sys.c	Add a personality to report 2.6.x version numbers	2011-08-25 10:17:28 -07:00
sys_ni.c	All Arch: remove linkage for sys_nfsservctl system call	2011-08-26 15:09:58 -07:00
sysctl.c	sysctl,rcu: Convert call_rcu(free_head) to kfree	2011-07-20 14:10:18 -07:00
sysctl_binary.c	xfs: remove subdirectories	2011-08-12 16:21:35 -05:00
sysctl_check.c	xfs: remove subdirectories	2011-08-12 16:21:35 -05:00
taskstats.c	Make TASKSTATS require root access	2011-09-19 17:04:37 -07:00
test_kprobes.c	…
time.c	…
timeconst.pl	…
timer.c	timers: Consider slack value in mod_timer()	2011-06-03 15:02:32 +02:00
tracepoint.c	Tracepoint: Dissociate from module mutex	2011-08-10 20:38:14 -04:00
tsacct.c	Make taskstats round statistics down to nearest 1k bytes/events	2011-09-19 17:10:57 -07:00
uid16.c	…
up.c	…
user-return-notifier.c	…
user.c	…
user_namespace.c	…
utsname.c	…
utsname_sysctl.c	…
wait.c	…
watchdog.c	watchdog: Drop FIFO policy in exit path	2011-09-18 14:34:07 +02:00
workqueue.c	workqueue: lock cwq access in drain_workqueue	2011-09-14 18:09:38 -07:00
workqueue_sched.h	…