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android_kernel_samsung_msm8976/kernel
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Thomas Gleixner 5a375bae39 posix-timers: Sanitize overrun handling 
commit 78c9c4dfbf8c04883941445a195276bb4bb92c76 upstream.

The posix timer overrun handling is broken because the forwarding functions
can return a huge number of overruns which does not fit in an int. As a
consequence timer_getoverrun(2) and siginfo::si_overrun can turn into
random number generators.

The k_clock::timer_forward() callbacks return a 64 bit value now. Make
k_itimer::ti_overrun[_last] 64bit as well, so the kernel internal
accounting is correct. 3Remove the temporary (int) casts.

Add a helper function which clamps the overrun value returned to user space
via timer_getoverrun(2) or siginfo::si_overrun limited to a positive value
between 0 and INT_MAX. INT_MAX is an indicator for user space that the
overrun value has been clamped.

Reported-by: Team OWL337 <icytxw@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <john.stultz@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Link: https://lkml.kernel.org/r/20180626132705.018623573@linutronix.de
[bwh: Backported to 3.16: adjust filenames, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
 		2019-07-27 21:53:21 +02:00
..
cpu sched/idle: Add missing checks to the exit condition of cpu_idle_poll() 2019-07-27 21:50:45 +02:00
debug
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events perf/core: Fix perf_pmu_unregister() locking 2019-07-27 21:53:14 +02:00
gcov
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irq This is the 3.10.99 stable release 2017-04-18 17:17:46 +02:00
locking Import latest Samsung release 2017-04-18 03:43:52 +02:00
power PM / wakeup: Only update last time for active wakeup sources 2019-07-27 21:52:47 +02:00
rcu rcu: Don't disable CPU hotplug during OOM notifiers 2016-01-06 23:11:06 -08:00
sched sched/autogroup: Fix possible Spectre-v1 indexing for sched_prio_to_weight[] 2019-07-27 21:52:06 +02:00
time nohz: Fix local_timer_softirq_pending() 2019-07-27 21:52:58 +02:00
trace ring-buffer: Allow for rescheduling when removing pages 2019-07-27 21:51:54 +02:00
.gitignore
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Kconfig.freezer
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Kconfig.hz
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Kconfig.locks Import latest Samsung release 2017-04-18 03:43:52 +02:00
Kconfig.preempt
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Makefile UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
acct.c
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async.c kernel/async.c: revert "async: simplify lowest_in_progress()" 2019-07-27 21:49:48 +02:00
audit.c BACKPORT: audit: consistently record PIDs with task_tgid_nr() 2019-07-27 21:50:56 +02:00
audit.h Import latest Samsung release 2017-04-18 03:43:52 +02:00
audit_tree.c
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audit_watch.c audit: fix use-after-free in audit_add_watch 2019-07-27 21:51:40 +02:00
auditfilter.c
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auditsc.c BACKPORT: audit: consistently record PIDs with task_tgid_nr() 2019-07-27 21:50:56 +02:00
backtracetest.c
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bounds.c
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capability.c
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cgroup.c cgroup: prefer %pK to %p 2016-12-06 09:24:09 -08:00
cgroup_freezer.c
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compat.c
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configs.c
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context_tracking.c
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cpu.c cpu: send KOBJ_ONLINE event when enabling cpus 2017-07-24 01:09:04 -07:00
cpu_pm.c
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cpuset.c cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags 2019-07-27 21:44:59 +02:00
crash_dump.c
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cred.c
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delayacct.c
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dma.c
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elfcore.c
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exec_domain.c ANDROID: exec_domains: Disable request_module() call for personalities 2016-05-18 14:34:40 +05:30
exit.c kernel: Only expose su when daemon is running 2017-05-15 14:43:52 +00:00
extable.c kernel/extable.c: mark core_kernel_text notrace 2019-07-27 21:44:25 +02:00
fork.c fork: don't copy inconsistent signal handler state to child 2019-07-27 21:51:36 +02:00
freezer.c
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futex.c futex: Remove unnecessary warning from get_futex_key 2019-07-27 21:51:41 +02:00
futex_compat.c ptrace: use fsuid, fsgid, effective creds for fs access checks 2016-02-25 11:57:47 -08:00
groups.c kernel: make groups_sort calling a responsibility group_info allocators 2019-07-27 21:46:18 +02:00
hrtimer.c hrtimer: Ensure POSIX compliance (relative CLOCK_REALTIME hrtimers) 2019-07-27 21:49:51 +02:00
hung_task.c
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irq_work.c irq_work: Remove BUG_ON in irq_work_run() 2016-01-07 00:42:12 -08:00
itimer.c
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jump_label.c
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kallsyms.c Import latest Samsung release 2017-04-18 03:43:52 +02:00
kcmp.c ptrace: use fsuid, fsgid, effective creds for fs access checks 2016-02-25 11:57:47 -08:00
kexec.c
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kmod.c
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kprobes.c
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ksysfs.c
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kthread.c
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latencytop.c
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modsign_pubkey.c
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module-internal.h UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
module.c module: Invalidate signatures on force-loaded modules 2019-07-27 21:42:00 +02:00
module_signing.c UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
notifier.c
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nsproxy.c
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padata.c padata: avoid race in reordering 2019-07-27 21:44:05 +02:00
panic.c printk: do cond_resched() between lines while outputting to consoles 2019-07-27 21:41:46 +02:00
params.c kernel/params.c: align add_sysfs_param documentation with code 2019-07-27 21:45:35 +02:00
pid.c BACKPORT: FROMLIST: pids: make task_tgid_nr_ns() safe 2018-05-26 00:39:33 +02:00
pid_namespace.c
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posix-cpu-timers.c posix-timers: Sanitize overrun handling 2019-07-27 21:53:21 +02:00
posix-timers.c posix-timers: Sanitize overrun handling 2019-07-27 21:53:21 +02:00
printk.c printk: use rcuidle console tracepoint 2019-07-27 21:44:09 +02:00
profile.c
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ptrace.c ptrace: change __ptrace_unlink() to clear ->ptrace under ->siglock 2019-07-27 21:45:46 +02:00
range.c
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relay.c kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE 2019-07-27 21:49:13 +02:00
res_counter.c
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resource.c resource: fix integer overflow at reallocation 2019-07-27 21:52:16 +02:00
seccomp.c UPSTREAM: seccomp: always propagate NO_NEW_PRIVS on tsync 2019-07-27 21:51:01 +02:00
signal.c signal: Only reschedule timers on signals timers have sent 2019-07-27 21:44:51 +02:00
smp.c Import latest Samsung release 2017-04-18 03:43:52 +02:00
smpboot.c
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smpboot.h
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softirq.c Import latest Samsung release 2017-04-18 03:43:52 +02:00
stacktrace.c
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stop_machine.c
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sys.c kernel/sys.c: fix potential Spectre v1 issue 2019-07-27 21:52:10 +02:00
sys_ni.c
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sysctl.c pipe: reject F_SETPIPE_SZ with size over UINT_MAX 2019-07-27 21:49:46 +02:00
sysctl_binary.c
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system_certificates.S UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
system_keyring.c UPSTREAM: KEYS: Separate the kernel signature checking keyring from module signing 2016-05-18 14:36:10 +05:30
task_work.c
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taskstats.c
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test_kprobes.c
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time.c time: Make sure jiffies_to_msecs() preserves non-zero time periods 2019-07-27 21:52:48 +02:00
timeconst.bc
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timer.c timers: Use proper base migration in add_timer_on() 2019-07-27 21:42:23 +02:00
tracepoint.c
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tsacct.c
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uid16.c kernel: make groups_sort calling a responsibility group_info allocators 2019-07-27 21:46:18 +02:00
up.c
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user-return-notifier.c
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user.c
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user_namespace.c userns: move user access out of the mutex 2019-07-27 21:51:26 +02:00
utsname.c
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utsname_sysctl.c
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watchdog.c
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workqueue.c workqueue: trigger WARN if queue_delayed_work() is called with NULL @wq 2019-07-27 21:45:23 +02:00
workqueue_internal.h
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