Re: [PATCH v4 07/36] arm64/gcs: Provide copy_to_user_gcs()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Aug 11, 2023 at 05:36:05PM +0100, Catalin Marinas wrote:
> On Mon, Aug 07, 2023 at 11:00:12PM +0100, Mark Brown wrote:
> > +static inline int copy_to_user_gcs(unsigned long __user *addr,
> > +				   unsigned long *val,
> > +				   int count)

> I think it makes more sense to have a put_user_gcs() of a single
> element. I've only seen it used with 2 elements in the signal code but
> we could as well do two put_user_gcs() calls (as we do for other stuff
> that we push to the signal frame).

Right, it's just the two element array in the signals code and the one
element for the context token in map_shadow_stack().  I can refactor to
a single read/write operation, I'd originally written it that way but I
wasn't thrilled with either writing a load of fun macros to mirror the
way vanilla put_user() is written or having code that looked very
different to the other similarly named functions were done.

Attachment: signature.asc
Description: PGP signature


[Index of Archives]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Linux FS]     [Yosemite Forum]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux