On Fri, 26 Apr 2019, Arnd Bergmann wrote:
> As Stepan Golosunov points out, we made a small mistake in the
> get_timespec64() function in the kernel. It was originally added under
> the assumption that CONFIG_64BIT_TIME would get enabled on all 32-bit
> and 64-bit architectures, but when I did the conversion, I only turned
> it on for 32-bit ones.
>
> The effect is that the get_timespec64() function never clears the upper
> half of the tv_nsec field for 32-bit tasks in compat mode. Clearing this
> is required for POSIX compliant behavior of functions that pass a
> 'timespec' structure with a 64-bit tv_sec and a 32-bit tv_nsec, plus
> uninitialized padding.
>
> The easiest fix for linux-5.1 is to just make the Kconfig symbol
> unconditional, as it was originally intended. As a follow-up,
> we should remove any #ifdef CONFIG_64BIT_TIME completely.
>
> Link:
> https://lore.kernel.org/lkml/[email protected]/
> Cc: Lukasz Majewski <[email protected]>
> Cc: Stepan Golosunov <[email protected]>
> Signed-off-by: Arnd Bergmann <[email protected]>
> ---
> Please apply this one as a bugfix for 5.1
Can you provide a 'Fixes: ....' tag please?
Thanks,
tglx
