Avi Kivity 8e7cac7980 core: Fix user return notifier on fork() ...

fork() clones all thread_info flags, including
TIF_USER_RETURN_NOTIFY; if the new task is first scheduled on a cpu
which doesn't have user return notifiers set, this causes user
return notifiers to trigger without any way of clearing itself.

This is easy to trigger with a forky workload on the host in
parallel with kvm, resulting in a cpu in an endless loop on the
verge of returning to userspace.

Fix by dropping the TIF_USER_RETURN_NOTIFY immediately after fork.

Signed-off-by: Avi Kivity <avi@redhat.com>
LKML-Reference: <1259505288-16559-1-git-send-email-avi@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2009-11-29 22:03:04 +01:00

..

gcov

microblaze: Enable GCOV_PROFILE_ALL

2009-09-21 14:29:21 +02:00

irq

Merge branch 'irq-threaded-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-11 13:21:31 -07:00

power

headers: utsname.h redux

2009-09-23 18:13:10 -07:00

time

Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-26 10:14:41 -07:00

trace

Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-26 10:13:54 -07:00

.gitignore

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acct.c

bsdacct: switch credentials for writing to the accounting file

2009-08-24 11:33:40 +10:00

async.c

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audit_tree.c

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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

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auditfilter.c

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auditsc.c

Audit: rearrange audit_context to save 16 bytes per struct

2009-09-24 03:50:26 -04:00

backtracetest.c

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bounds.c

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capability.c

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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: let ss->can_attach and ss->attach do whole threadgroups at a time

2009-09-24 07:20:58 -07:00

compat.c

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configs.c

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cpu.c

Merge branch 'x86-pat-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-15 09:19:38 -07:00

cpuset.c

cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time

2009-09-24 07:20:58 -07:00

cred-internals.h

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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

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exec_domain.c

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exit.c

task_struct cleanup: move binfmt field to mm_struct

2009-09-24 07:21:05 -07:00

extable.c

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fork.c

core: Fix user return notifier on fork()

2009-11-29 22:03:04 +01:00

freezer.c

sched: fix nr_uninterruptible accounting of frozen tasks really

2009-07-18 14:19:53 +02:00

futex_compat.c

futex: Fix compat_futex to be same as futex for REQUEUE_PI

2009-08-10 15:41:12 +02:00

futex.c

futex: Add memory barrier commentary to futex_wait_queue_me()

2009-09-24 22:30:10 +02:00

groups.c

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hrtimer.c

Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-27 10:39:04 -07:00

hung_task.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

itimer.c

itimers: Add tracepoints for itimer

2009-08-29 14:10:07 +02:00

kallsyms.c

kallsyms: use new arch_is_kernel_text()

2009-09-23 07:39:30 -07:00

Kconfig.freezer

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Kconfig.hz

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Kconfig.preempt

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kexec.c

kexec: fix omitting offset in extended crashkernel syntax

2009-07-29 19:10:34 -07:00

kfifo.c

kfifo: Use "const" definitions

2009-09-19 13:13:17 -07:00

kgdb.c

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kmod.c

Revert "kmod: fix race in usermodehelper code"

2009-09-23 18:12:10 -07:00

kprobes.c

seq_file: constify seq_operations

2009-09-23 07:39:29 -07:00

ksysfs.c

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kthread.c

sched: Keep kthreads at default priority

2009-09-09 17:30:06 +02:00

latencytop.c

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lockdep_internals.h

lockdep: BFS cleanup

2009-07-24 10:53:29 +02:00

lockdep_proc.c

seq_file: constify seq_operations

2009-09-23 07:39:29 -07:00

lockdep_states.h

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lockdep.c

lockdep: use new arch_is_kernel_data()

2009-09-23 07:39:30 -07:00

Makefile

x86: Fix user return notifier build

2009-10-25 17:37:57 +01:00

module.c

Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-26 10:13:54 -07:00

mutex-debug.c

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mutex-debug.h

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mutex.c

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mutex.h

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notifier.c

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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

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panic.c

trivial: Correct print_tainted routine name in comment

2009-09-21 15:14:53 +02:00

params.c

param: allow whitespace as kernel parameter separator

2009-09-25 00:32:58 +09:30

perf_event.c

const: mark struct vm_struct_operations

2009-09-27 11:39:25 -07:00

pid_namespace.c

pidns: deny CLONE_PARENT|CLONE_NEWPID combination

2009-09-24 07:21:04 -07:00

pid.c

mm: also use alloc_large_system_hash() for the PID hash table

2009-09-22 07:17:38 -07:00

pm_qos_params.c

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posix-cpu-timers.c

itimers: Add tracepoints for itimer

2009-08-29 14:10:07 +02:00

posix-timers.c

time: Introduce CLOCK_REALTIME_COARSE

2009-08-21 21:43:46 +02:00

printk.c

printk: add printk_delay to make messages readable for some scenarios

2009-09-23 07:39:28 -07:00

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: Fix whitespace inconsistencies

2009-09-19 08:53:22 +02:00

rcutorture.c

rcu: Fix whitespace inconsistencies

2009-09-19 08:53:22 +02:00

rcutree_plugin.h

rcu: Fix whitespace inconsistencies

2009-09-19 08:53:22 +02:00

rcutree_trace.c

rcu: Fix whitespace inconsistencies

2009-09-19 08:53:22 +02:00

rcutree.c

rcu: Fix whitespace inconsistencies

2009-09-19 08:53:22 +02:00

rcutree.h

rcu: Fix whitespace inconsistencies

2009-09-19 08:53:22 +02:00

relay.c

const: mark struct vm_struct_operations

2009-09-27 11:39:25 -07:00

res_counter.c

memory controller: soft limit organize cgroups

2009-09-24 07:20:59 -07:00

resource.c

walk system ram range

2009-09-23 07:39:41 -07:00

rtmutex_common.h

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rtmutex-debug.c

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rtmutex-debug.h

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rtmutex-tester.c

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rtmutex.c

rtmutex: Avoid deadlock in rt_mutex_start_proxy_lock()

2009-08-06 05:50:21 +02:00

rtmutex.h

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rwsem.c

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sched_clock.c

sched_clock: Fix atomicity/continuity bug by using cmpxchg64()

2009-09-30 22:56:10 +02:00

sched_cpupri.c

sched: Add new prio to cpupri before removing old prio

2009-08-02 14:26:09 +02:00

sched_cpupri.h

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sched_debug.c

sched: Add new wakeup preemption mode: WAKEUP_RUNNING

2009-09-17 10:17:25 +02:00

sched_fair.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

sched_features.h

sched: Add new wakeup preemption mode: WAKEUP_RUNNING

2009-09-17 10:17:25 +02:00

sched_idletask.c

sched: Simplify sys_sched_rr_get_interval() system call

2009-09-21 09:53:55 +02:00

sched_rt.c

sched: Simplify sys_sched_rr_get_interval() system call

2009-09-21 09:53:55 +02:00

sched_stats.h

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sched.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

seccomp.c

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semaphore.c

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signal.c

signals: inline __fatal_signal_pending

2009-09-24 07:21:01 -07:00

slow-work.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

smp.c

cpumask: remove arch_send_call_function_ipi

2009-09-24 09:34:47 +09:30

softirq.c

softirq: add BLOCK_IOPOLL to softirq_to_name

2009-09-17 15:53:44 -04:00

softlockup.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

spinlock.c

locking: Allow arch-inlined spinlocks

2009-08-31 18:08:50 +02:00

srcu.c

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stacktrace.c

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stop_machine.c

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sys_ni.c

Merge branch 'master' of /home/davem/src/GIT/linux-2.6/

2009-09-24 15:13:11 -07:00

sys.c

Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6

2009-09-24 07:53:22 -07:00

sysctl_check.c

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sysctl.c

Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6

2009-09-24 07:53:22 -07:00

taskstats.c

genetlink: make netns aware

2009-07-12 14:03:27 -07:00

test_kprobes.c

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time.c

time: Prevent 32 bit overflow with set_normalized_timespec()

2009-09-15 10:17:30 +02:00

timeconst.pl

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timer.c

Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-23 09:46:15 -07:00

tracepoint.c

trivial: fix typo "to to" in multiple files

2009-09-21 15:14:55 +02:00

tsacct.c

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uid16.c

headers: utsname.h redux

2009-09-23 18:13:10 -07:00

up.c

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user_namespace.c

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user-return-notifier.c

x86: Fix user return notifier put_cpu_var() invocation

2009-11-02 07:58:59 +01:00

user.c

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utsname_sysctl.c

sysctl: remove "struct file *" argument of ->proc_handler

2009-09-24 07:21:04 -07:00

utsname.c

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wait.c

locking, sched: Give waitqueue spinlocks their own lockdep classes

2009-08-10 14:43:09 +02:00

workqueue.c

Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-09-11 13:23:18 -07:00