Re: [patch V2 07/50] posix-cpu-timers: Split up posix_cpu_timer_get()

[Anna-Maria Behnsen]

Oleg Nesterov <oleg@xxxxxxxxxx> writes:

> On 04/11, Thomas Gleixner wrote:
>>
>> In preparation for addressing issues in the timer_get() and timer_set()
>> functions of posix CPU timers.
>
> Cough... I must have missed something, but posix_cpu_timer_get()
> doesn't look right with or without this trivial patch.
>
> It doesn't initialize itp->it_value if cpu_timer_getexpires() == 0,
> this means that sys_timer_gettime() will copy the uninitialized
> cur_setting->it_value on the stack to userspace?

The initialization of itp is already done by the callsites.
do_timer_settime() in posix-timers.c as well as do_cpu_nanosleep() in
posix-cpu-timers.c execute a memset before calling
posix_cpu_timer_get(). So this should be fine - or did I miss something
here?

Thanks,

	Anna-Maria