Qianli Zhao b952caf2d5 timers: Mask invalid flags in do_init_timer() ...

do_init_timer() accepts any combination of timer flags handed in by the
caller without a sanity check, but only TIMER_DEFFERABLE, TIMER_PINNED and
TIMER_IRQSAFE are valid.

If the supplied flags have other bits set, this could result in
malfunction. If bits are set in TIMER_CPUMASK the first timer usage could
deference a cpu base which is outside the range of possible CPUs. If
TIMER_MIGRATION is set, then the switch_timer_base() will live lock.

Prevent that with a sanity check which warns when invalid flags are
supplied and masks them out.

[ tglx: Made it WARN_ON_ONCE() and added context to the changelog ]

Signed-off-by: Qianli Zhao <zhaoqianli@xiaomi.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/9d79a8aa4eb56713af7379f99f062dedabcde140.1597326756.git.zhaoqianli@xiaomi.com

2020-09-24 22:12:18 +02:00

..

alarmtimer.c

alarmtimer: Convert comma to semicolon

2020-08-25 12:45:53 +02:00

clockevents.c

…

clocksource.c

clocksource: Remove obsolete ifdef

2020-06-09 16:36:47 +02:00

hrtimer.c

hrtimer: Use sequence counter with associated raw spinlock

2020-07-29 16:14:29 +02:00

itimer.c

y2038: rename itimerval to __kernel_old_itimerval

2019-12-18 18:07:33 +01:00

jiffies.c

timekeeping: Split jiffies seqlock

2020-03-21 16:00:23 +01:00

Kconfig

posix-cpu-timers: Provide mechanisms to defer timer handling to task_work

2020-08-06 16:50:59 +02:00

Makefile

ns: Introduce Time Namespace

2020-01-14 12:20:48 +01:00

namespace.c

nsproxy: support CLONE_NEWTIME with setns()

2020-07-08 11:14:22 +02:00

ntp_internal.h

…

ntp.c

…

posix-clock.c

posix-clocks: Rename the clock_get() callback to clock_get_timespec()

2020-01-14 12:20:49 +01:00

posix-cpu-timers.c

posix-cpu-timers: Provide mechanisms to defer timer handling to task_work

2020-08-06 16:50:59 +02:00

posix-stubs.c

posix-timers: Make clock_nanosleep() time namespace aware

2020-01-14 12:20:55 +01:00

posix-timers.c

posix-timers: Pass lockdep expression to RCU lists

2020-02-17 20:12:19 +01:00

posix-timers.h

posix-clocks: Introduce clock_get_ktime() callback

2020-01-14 12:20:51 +01:00

sched_clock.c

time: Delete repeated words in comments

2020-08-10 22:14:07 +02:00

test_udelay.c

…

tick-broadcast-hrtimer.c

…

tick-broadcast.c

…

tick-common.c

timekeeping: Split jiffies seqlock

2020-03-21 16:00:23 +01:00

tick-internal.h

…

tick-oneshot.c

…

tick-sched.c

tick/nohz: Narrow down noise while setting current task's tick dependency

2020-06-29 11:58:50 -07:00

tick-sched.h

…

time.c

y2038: remove unused time32 interfaces

2020-02-21 11:22:15 -08:00

timeconst.bc

…

timeconv.c

…

timecounter.c

…

timekeeping_debug.c

…

timekeeping_internal.h

timekeeping/vsyscall: Provide vdso_update_begin/end()

2020-08-06 10:57:30 +02:00

timekeeping.c

timekeeping: Provide multi-timestamp accessor to NMI safe timekeeper

2020-08-23 10:38:24 +02:00

timekeeping.h

timekeeping: Split jiffies seqlock

2020-03-21 16:00:23 +01:00

timer_list.c

…

timer.c

timers: Mask invalid flags in do_init_timer()

2020-09-24 22:12:18 +02:00

vsyscall.c

timekeeping/vsyscall: Provide vdso_update_begin/end()

2020-08-06 10:57:30 +02:00