Wen Yang 7650b4b1df ftrace: Avoid potential division by zero in function profiler ...

commit e31f7939c1 upstream.

The ftrace_profile->counter is unsigned long and
do_div truncates it to 32 bits, which means it can test
non-zero and be truncated to zero for division.
Fix this issue by using div64_ul() instead.

Link: http://lkml.kernel.org/r/20200103030248.14516-1-wenyang@linux.alibaba.com

Cc: stable@vger.kernel.org
Fixes: e330b3bcd8 ("tracing: Show sample std dev in function profiling")
Fixes: 34886c8bc5 ("tracing: add average time in function to function profiler")
Signed-off-by: Wen Yang <wenyang@linux.alibaba.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2020-01-09 10:17:56 +01:00

..

bpf

bpf: drop refcount if bpf_map_new_fd() fails in map_create()

2019-12-05 15:38:00 +01:00

cgroup

cgroup: pids: use atomic64_t for pids->limit

2019-12-17 20:39:29 +01:00

configs

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debug

kdb: Don't back trace on a cpu that didn't round up

2019-02-12 19:46:09 +01:00

events

signal: Properly deliver SIGILL from uprobes

2019-11-20 17:59:52 +01:00

gcov

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irq

genirq: Prevent NULL pointer dereference in resend_irqs()

2019-09-19 09:08:04 +02:00

livepatch

livepatch: Nullify obj->mod in klp_module_coming()'s error path

2019-10-07 18:55:09 +02:00

locking

Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"

2019-10-11 18:18:36 +02:00

power

PM / hibernate: memory_bm_find_bit(): Tighten node optimisation

2020-01-09 10:17:53 +01:00

printk

printk: fix integer overflow in setup_log_buf()

2019-12-01 09:13:17 +01:00

rcu

rcuperf: Fix cleanup path for invalid perf_type strings

2019-05-31 06:47:33 -07:00

sched

sched/fair: Scale bandwidth quota and period without losing quota/period ratio precision

2019-12-17 20:38:43 +01:00

time

ptp: fix the race between the release of ptp_clock and cdev

2020-01-04 14:00:12 +01:00

trace

ftrace: Avoid potential division by zero in function profiler

2020-01-09 10:17:56 +01:00

.gitignore

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acct.c

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async.c

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audit_fsnotify.c

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audit_tree.c

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audit_watch.c

audit_get_nd(): don't unlock parent too early

2019-12-17 20:37:27 +01:00

audit.c

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audit.h

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auditfilter.c

audit: fix a memory leak bug

2019-05-31 06:47:25 -07:00

auditsc.c

audit: print empty EXECVE args

2019-12-01 09:14:03 +01:00

backtracetest.c

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bounds.c

kbuild: fix kernel/bounds.c 'W=1' warning

2018-11-13 11:15:08 -08:00

capability.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_pm.c

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cpu.c

cpu/SMT: State SMT is disabled even with nosmt and without "=force"

2019-11-24 08:23:08 +01:00

crash_core.c

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crash_dump.c

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cred.c

memcg: account security cred as well to kmemcg

2020-01-09 10:17:54 +01:00

delayacct.c

delayacct: Use raw_spinlocks

2018-08-03 07:50:38 +02:00

dma.c

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elfcore.c

kernel/elfcore.c: include proper prototypes

2019-10-11 18:18:42 +02:00

exec_domain.c

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exit.c

exit: panic before exit_mm() on global init exit

2020-01-09 10:17:56 +01:00

extable.c

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fork.c

futex: Split futex_mm_release() for exit/exec

2019-12-05 15:38:26 +01:00

freezer.c

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futex.c

futex: Prevent exit livelock

2019-12-05 15:38:28 +01:00

groups.c

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hung_task.c

kernel: hung_task.c: disable on suspend

2019-04-20 09:15:05 +02:00

irq_work.c

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jump_label.c

sched/core: Fix cpu.max vs. cpuhotplug deadlock

2018-12-05 19:41:17 +01:00

kallsyms.c

kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol

2019-09-21 07:15:38 +02:00

kcmp.c

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Kconfig.freezer

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Kconfig.hz

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Kconfig.locks

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Kconfig.preempt

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kcov.c

kcov: ensure irq code sees a valid area

2018-08-03 07:50:22 +02:00

kexec_core.c

kexec: Allocate decrypted control pages for kdump if SME is enabled

2019-11-24 08:23:15 +01:00

kexec_file.c

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kexec_internal.h

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kexec.c

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kmod.c

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kprobes.c

kprobes: Don't call BUG_ON() if there is a kprobe in use on free list

2019-11-20 17:59:56 +01:00

ksysfs.c

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kthread.c

kthread, tracing: Don't expose half-written comm when creating kthreads

2018-08-03 07:50:21 +02:00

latencytop.c

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Makefile

y2038: futex: Move compat implementation into futex.c

2019-12-05 15:38:22 +01:00

memremap.c

mm, devm_memremap_pages: kill mapping "System RAM" support

2019-01-13 10:01:02 +01:00

module_signing.c

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module-internal.h

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module.c

kernel/module.c: wakeup processes in module_wq on module unload

2019-12-17 20:40:02 +01:00

notifier.c

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nsproxy.c

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padata.c

padata: use smp_mb in padata_reorder to avoid orphaned padata jobs

2019-07-31 07:28:39 +02:00

panic.c

panic: ensure preemption is disabled during panic()

2019-10-17 13:43:19 -07:00

params.c

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pid_namespace.c

signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig

2019-07-31 07:28:21 +02:00

pid.c

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profile.c

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ptrace.c

ptrace: Fix ->ptracer_cred handling for PTRACE_TRACEME

2019-07-10 09:54:38 +02:00

range.c

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reboot.c

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relay.c

relay: check return of create_buf_file() properly

2019-03-13 14:03:20 -07:00

resource.c

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seccomp.c

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signal.c

signal: Always ignore SIGKILL and SIGSTOP sent to the global init

2019-11-20 17:59:52 +01:00

smp.c

cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM

2019-02-12 19:46:13 +01:00

smpboot.c

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smpboot.h

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softirq.c

Mark HI and TASKLET softirq synchronous

2018-08-15 18:12:47 +02:00

stacktrace.c

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stop_machine.c

stop_machine: Atomically queue and wake stopper threads

2018-09-05 09:26:36 +02:00

sys_ni.c

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sys.c

kernel/sys.c: prctl: fix false positive in validate_prctl_map()

2019-06-15 11:54:52 +02:00

sysctl_binary.c

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sysctl.c

kernel: sysctl: make drop_caches write-only

2020-01-04 13:59:57 +01:00

task_work.c

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taskstats.c

taskstats: fix data-race

2020-01-09 10:17:53 +01:00

test_kprobes.c

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torture.c

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tracepoint.c

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tsacct.c

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ucount.c

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uid16.c

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umh.c

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up.c

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user_namespace.c

userns: move user access out of the mutex

2018-09-09 19:56:00 +02:00

user-return-notifier.c

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user.c

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utsname_sysctl.c

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 19:56:00 +02:00

utsname.c

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watchdog_hld.c

watchdog: Mark watchdog touch functions as notrace

2018-09-05 09:26:42 +02:00

watchdog.c

watchdog: Mark watchdog touch functions as notrace

2018-09-05 09:26:42 +02:00

workqueue_internal.h

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workqueue.c

workqueue: Fix missing kfree(rescuer) in destroy_workqueue()

2019-12-17 20:39:59 +01:00