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37bebc70d7
android_kernel_xiaomi_sm8350/kernel
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Oleg Nesterov 37bebc70d7 posix timers: fix RLIMIT_CPU && fork() 
See http://bugzilla.kernel.org/show_bug.cgi?id=12911

copy_signal() copies signal->rlim, but RLIMIT_CPU is "lost". Because
posix_cpu_timers_init_group() sets cputime_expires.prof_exp = 0 and thus
fastpath_timer_check() returns false unless we have other cpu timers.

This is the minimal fix for 2.6.29 (tested) and 2.6.28. The patch is not
optimal, we need further cleanups here. With this patch update_rlimit_cpu()
is not really needed, but I don't think it should be removed.

The proper fix (I think) is:

	- set_process_cpu_timer() should just start the cputimer->running
	  logic (it does), no need to change cputime_expires.xxx_exp

	- posix_cpu_timers_init_group() should set ->running when needed

	- fastpath_timer_check() can check ->running instead of
	  task_cputime_zero(signal->cputime_expires)

Reported-by: Peter Lojkin <ia6432@inbox.ru>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: <stable@kernel.org> [for 2.6.29.x]
LKML-Reference: <20090323193411.GA17514@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-23 20:43:35 +01:00
..
irq Merge branch 'core/xen' into x86/urgent 2009-02-04 14:54:56 +01:00
power PM: Split up sysdev_[suspend|resume] from device_power_[down|up] 2009-02-22 10:33:44 -08:00
time hrtimers: allow the hot-unplugging of all cpus 2009-01-30 22:35:29 +01:00
trace tracing: limit the number of loops the ring buffer self test can make 2009-02-18 22:50:01 -05:00
.gitignore
acct.c [CVE-2009-0029] System call wrappers part 04 2009-01-14 14:15:19 +01:00
async.c async: use list_move_tail 2009-02-08 10:00:26 -08:00
audit_tree.c audit: validate comparison operations, store them in sane form 2009-01-04 15:14:42 -05:00
audit.c [PATCH] fix broken timestamps in AVC generated by kernel threads 2008-12-09 02:27:41 -05:00
audit.h fixing audit rule ordering mess, part 1 2009-01-04 15:14:41 -05:00
auditfilter.c audit: validate comparison operations, store them in sane form 2009-01-04 15:14:42 -05:00
auditsc.c make sure that filterkey of task,always rules is reported 2009-01-04 15:14:42 -05:00
backtracetest.c
bounds.c
capability.c [CVE-2009-0029] System call wrappers part 04 2009-01-14 14:15:19 +01:00
cgroup_debug.c
cgroup_freezer.c
cgroup.c cgroups: fix possible use after free 2009-02-18 15:37:54 -08:00
compat.c Allow times and time system calls to return small negative values 2009-01-06 15:59:13 -08:00
configs.c
cpu.c stop_machine/cpu hotplug: fix disable_nonboot_cpus 2009-01-07 11:36:14 -08:00
cpuset.c cpuset: fix possible deadlock in async_rebuild_sched_domains 2009-01-19 02:44:00 +01:00
cred-internals.h
cred.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6 2009-01-09 13:59:25 -08:00
delayacct.c schedstat: consolidate per-task cpu runtime stats 2008-12-18 13:54:01 +01:00
dma-coherent.c dma-coherent: Restore dma_alloc_from_coherent() large alloc fall back policy. 2009-01-21 18:51:53 +09:00
dma.c
exec_domain.c [CVE-2009-0029] System call wrappers part 04 2009-01-14 14:15:19 +01:00
exit.c signal: re-add dead task accumulation stats. 2009-02-05 13:04:33 +01:00
extable.c Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-12-30 16:10:19 -08:00
fork.c copy_process: fix CLONE_PARENT && parent_exec_id interaction 2009-03-09 13:23:25 -07:00
freezer.c
futex_compat.c
futex.c futex: fix reference leak 2009-02-11 18:24:08 +01:00
hrtimer.c hrtimer: prevent negative expiry value after clock_was_set() 2009-01-30 22:35:34 +01:00
itimer.c timers: split process wide cpu clocks/timers 2009-02-05 13:04:33 +01:00
kallsyms.c Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
Kconfig.freezer
Kconfig.hz
Kconfig.preempt rcu: provide RCU options on non-preempt architectures too 2008-12-25 09:31:28 +01:00
kexec.c PM: Split up sysdev_[suspend|resume] from device_power_[down|up] 2009-02-22 10:33:44 -08:00
kfifo.c
kgdb.c
kmod.c kmod: fix varargs kernel-doc 2009-01-06 15:59:27 -08:00
kprobes.c kprobes: check CONFIG_FREEZER instead of CONFIG_PM 2009-01-16 14:32:17 -05:00
ksysfs.c kernel/ksysfs.c:fix dependence on CONFIG_NET 2009-01-06 10:44:31 -08:00
kthread.c
latencytop.c KSYM_SYMBOL_LEN fixes 2008-12-10 08:01:54 -08:00
lockdep_internals.h
lockdep_proc.c
lockdep.c Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-12-30 16:10:19 -08:00
Makefile PM: fix build for CONFIG_PM unset 2009-02-21 14:17:17 -08:00
marker.c
module.c module: fix refptr allocation and release order 2009-03-18 09:31:21 +10:30
mutex-debug.c
mutex-debug.h
mutex.c mutex: __used is needed for function referenced only from inline asm 2008-11-24 10:00:28 +01:00
mutex.h
notifier.c Merge commit 'v2.6.28-rc6' into core/debug 2008-11-26 08:22:50 +01:00
ns_cgroup.c ns_cgroup: remove unused spinlock 2009-01-08 08:31:02 -08:00
nsproxy.c User namespaces: set of cleanups (v2) 2008-11-24 18:57:41 -05:00
panic.c oops: increment the oops UUID every time we oops 2009-01-06 15:59:12 -08:00
params.c
pid_namespace.c
pid.c pid: generalize task_active_pid_ns 2009-01-08 08:31:12 -08:00
pm_qos_params.c
posix-cpu-timers.c posix timers: fix RLIMIT_CPU && fork() 2009-03-23 20:43:35 +01:00
posix-timers.c [CVE-2009-0029] System call wrappers part 05 2009-01-14 14:15:20 +01:00
printk.c PM: Fix suspend_console and resume_console to use only one semaphore 2009-02-21 14:17:18 -08:00
profile.c profiling: fix broken profiling regression 2009-02-10 00:50:37 +01:00
ptrace.c [CVE-2009-0029] System call wrappers part 27 2009-01-14 14:15:29 +01:00
rcuclassic.c rcu: Teach RCU that idle task is not quiscent state at boot 2009-02-26 04:08:14 +01:00
rcupdate.c rcu: Teach RCU that idle task is not quiscent state at boot 2009-02-26 04:08:14 +01:00
rcupreempt_trace.c "Tree RCU": scalable classic RCU implementation 2008-12-18 21:56:04 +01:00
rcupreempt.c rcu: Teach RCU that idle task is not quiscent state at boot 2009-02-26 04:08:14 +01:00
rcutorture.c rcu: fix bug in rcutorture system-shutdown code 2009-01-07 23:36:25 +01:00
rcutree_trace.c "Tree RCU": scalable classic RCU implementation 2008-12-18 21:56:04 +01:00
rcutree.c rcu: Teach RCU that idle task is not quiscent state at boot 2009-02-26 04:08:14 +01:00
relay.c relay: fix lock imbalance in relay_late_setup_files 2009-01-18 20:29:35 +01:00
res_counter.c memcg: memory cgroup resource counters for hierarchy 2009-01-08 08:31:05 -08:00
resource.c resources: fix parameter name and kernel-doc 2009-01-15 16:39:38 -08:00
rtmutex_common.h
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rwsem.c
sched_clock.c sched_clock: prevent scd->clock from moving backwards, take #2 2008-12-31 09:53:21 +01:00
sched_cpupri.c sched: fix section mismatch 2009-01-06 11:07:15 +01:00
sched_cpupri.h sched: convert struct cpupri_vec cpumask_var_t. 2008-11-24 17:52:22 +01:00
sched_debug.c sched: partly revert "sched debug: remove NULL checking in print_cfs_rt_rq()" 2009-01-11 02:40:32 +01:00
sched_fair.c sched: revert recent sync wakeup changes 2009-02-11 14:43:35 +01:00
sched_features.h
sched_idletask.c
sched_rt.c sched_rt: don't use first_cpu on cpumask created with cpumask_and 2009-02-01 10:49:52 +01:00
sched_stats.h timers: split process wide cpu clocks/timers 2009-02-05 13:04:33 +01:00
sched.c sched: don't allow setuid to succeed if the user does not have rt bandwidth 2009-02-27 11:11:53 +01:00
seccomp.c x86-64: seccomp: fix 32/64 syscall hole 2009-03-02 15:41:30 -08:00
semaphore.c
signal.c fix ptrace slowness 2009-03-23 09:22:31 -07:00
smp.c generic-ipi: use per cpu data for single cpu ipi calls 2009-01-30 18:31:08 +01:00
softirq.c rcu: increment quiescent state counter in ksoftirqd() 2009-03-04 22:08:45 +01:00
softlockup.c softlock: fix false panic which can occur if softlockup_thresh is reduced 2009-01-14 11:48:07 +01:00
spinlock.c
srcu.c
stacktrace.c stacktrace: provide save_stack_trace_tsk() weak alias 2008-12-25 11:44:43 +01:00
stop_machine.c stop_machine: introduce stop_machine_create/destroy. 2009-01-05 08:40:14 +10:30
sys_ni.c [CVE-2009-0029] Make sys_syslog a conditional system call 2009-01-14 14:15:16 +01:00
sys.c sched: don't allow setuid to succeed if the user does not have rt bandwidth 2009-02-27 11:11:53 +01:00
sysctl_check.c
sysctl.c mm: fix dirty_bytes/dirty_background_bytes sysctls on 64bit arches 2009-02-11 14:25:35 -08:00
taskstats.c cpumask: convert rest of files in kernel/ 2009-01-01 10:12:28 +10:30
test_kprobes.c kprobes: add tests for register_kprobes 2009-01-06 15:59:20 -08:00
time.c [CVE-2009-0029] System call wrappers part 01 2009-01-14 14:15:18 +01:00
timeconst.pl
timer.c [CVE-2009-0029] System call wrappers part 27 2009-01-14 14:15:29 +01:00
tracepoint.c
tsacct.c Fix fixpoint divide exception in acct_update_integrals 2009-03-09 08:13:35 -07:00
uid16.c [CVE-2009-0029] System call wrappers part 19 2009-01-14 14:15:26 +01:00
up.c smp_call_function_single(): be slightly less stupid, fix #2 2009-01-12 16:04:37 +01:00
user_namespace.c Fix recursive lock in free_uid()/free_user_ns() 2009-02-27 16:26:21 -08:00
user.c kernel/user.c: fix a memory leak when freeing up non-init usernamespaces users 2009-03-10 15:55:11 -07:00
utsname_sysctl.c
utsname.c
wait.c wait: prevent exclusive waiter starvation 2009-02-05 12:56:48 -08:00
workqueue.c work_on_cpu: Use our own workqueue. 2009-01-19 22:36:07 +01:00