Re: [PATCH] posix-timers: Preserve return value in COMPAT(clock_adjtime)

[Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>]

On Sat, May 08, 2021 at 01:55:44AM +0200, Thomas Gleixner wrote:
> From: Chen Jun <chenjun102@xxxxxxxxxx>
> 
> commit 2d036dfa5f10df9782f5278fc591d79d283c1fad upstream.
> 
> The return value on success (>= 0) is overwritten by the return value of
> compat_put_timex(). That works correct in the fault case, but is wrong for
> the success case where compat_put_timex() returns 0.
> 
> Just check the return value of compat_put_timex() and return -EFAULT in case
> it is not zero.
> 
> [ tglx: Massage changelog ]
> [ tglx: Backport to 4.19, 4.14 ]

Thanks, now queued up.

greg k-h