Wen Yang 010a7e846d ftrace: Avoid potential division by zero in function profiler ...

commit e31f7939c1c27faa5d0e3f14519eaf7c89e8a69d 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 10:19:03 +01:00

..

bpf

bpf/stackmap: Fix deadlock with rq_lock in bpf_get_stack()

2019-12-31 16:35:20 +01:00

cgroup

cgroup: pids: use atomic64_t for pids->limit

2019-12-17 20:34:56 +01:00

configs

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debug

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

2019-02-12 19:47:19 +01:00

dma

dma-debug: add a schedule point in debug_dma_dump_mappings()

2020-01-04 19:12:43 +01:00

events

perf/core: Consistently fail fork on allocation failures

2019-12-13 08:51:04 +01:00

gcov

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irq

irq/matrix: Fix memory overallocation

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

livepatch

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

2019-10-07 18:57:10 +02:00

locking

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

2019-10-11 18:21:06 +02:00

power

PM / hibernate: memory_bm_find_bit(): Tighten node optimisation

2020-01-09 10:18:58 +01:00

printk

printk: fix integer overflow in setup_log_buf()

2019-12-01 09:16:14 +01:00

rcu

rcuperf: Fix cleanup path for invalid perf_type strings

2019-05-31 06:46:30 -07:00

sched

cpufreq: Avoid leaving stale IRQ work items during CPU offline

2019-12-31 16:36:22 +01:00

time

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

2020-01-04 19:13:35 +01:00

trace

ftrace: Avoid potential division by zero in function profiler

2020-01-09 10:19:03 +01:00

.gitignore

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acct.c

acct_on(): don't mess with freeze protection

2019-05-31 06:46:05 -07:00

async.c

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audit_fsnotify.c

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audit_tree.c

audit: Embed key into chunk

2019-12-13 08:51:11 +01:00

audit_watch.c

audit_get_nd(): don't unlock parent too early

2019-12-13 08:51:02 +01:00

audit.c

…

audit.h

…

auditfilter.c

audit: fix a memory leak bug

2019-05-31 06:46:17 -07:00

auditsc.c

audit: print empty EXECVE args

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

backtracetest.c

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bounds.c

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

2018-11-13 11:08:47 -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 08:20:18 +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 10:19:00 +01:00

delayacct.c

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dma.c

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elfcore.c

kernel/elfcore.c: include proper prototypes

2019-10-11 18:21:23 +02:00

exec_domain.c

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exit.c

exit: panic before exit_mm() on global init exit

2020-01-09 10:19:02 +01:00

extable.c

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fail_function.c

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fork.c

fork: fix some -Wmissing-prototypes warnings

2019-12-05 09:21:04 +01:00

freezer.c

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futex.c

futex: Prevent robust futex exit race

2019-12-01 09:17:38 +01:00

groups.c

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hung_task.c

kernel: hung_task.c: disable on suspend

2019-04-20 09:16:02 +02:00

iomem.c

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irq_work.c

irq_work: Do not raise an IPI when queueing work on the local CPU

2019-05-31 06:46:19 -07:00

jump_label.c

jump_label: move 'asm goto' support test to Kconfig

2019-06-04 08:02:34 +02:00

kallsyms.c

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

2019-09-21 07:17:02 +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

kernel/kcov.c: mark write_comp_data() as notrace

2019-02-12 19:47:20 +01:00

kexec_core.c

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

2019-11-24 08:20:29 +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: Blacklist symbols in arch-defined prohibited area

2019-12-05 09:20:26 +01:00

ksysfs.c

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kthread.c

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latencytop.c

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Makefile

y2038: futex: Move compat implementation into futex.c

2019-12-01 09:17:38 +01:00

memremap.c

mm, devm_memremap_pages: add MEMORY_DEVICE_PRIVATE support

2019-01-13 09:51:04 +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 20:35:57 +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

2019-07-26 09:14:25 +02:00

panic.c

kernel/panic.c: do not append newline to the stack protector panic string

2019-12-01 09:17:10 +01:00

params.c

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pid_namespace.c

signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig

2019-07-26 09:14:01 +02:00

pid.c

Fix failure path in alloc_pid()

2019-01-13 09:51:06 +01:00

profile.c

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ptrace.c

ptrace: Fix ->ptracer_cred handling for PTRACE_TRACEME

2019-07-10 09:53:41 +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 14:02:35 -07:00

resource.c

resource: fix locking in find_next_iomem_res()

2019-09-16 08:22:20 +02:00

rseq.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 18:46:21 +01:00

smp.c

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

2019-02-12 19:47:25 +01:00

smpboot.c

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smpboot.h

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softirq.c

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stacktrace.c

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stop_machine.c

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sys_ni.c

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sys.c

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

2019-06-15 11:54:01 +02:00

sysctl_binary.c

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sysctl.c

kernel: sysctl: make drop_caches write-only

2020-01-04 19:13:17 +01:00

task_work.c

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taskstats.c

taskstats: fix data-race

2020-01-09 10:18:59 +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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uid16.h

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umh.c

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up.c

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user_namespace.c

userns: also map extents in the reverse map to kernel IDs

2018-11-13 11:09:00 -08:00

user-return-notifier.c

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user.c

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utsname_sysctl.c

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utsname.c

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watchdog_hld.c

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watchdog.c

watchdog: Respect watchdog cpumask on CPU hotplug

2019-04-03 06:26:29 +02:00

workqueue_internal.h

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workqueue.c

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

2019-12-17 20:35:50 +01:00