Re: sys_syscall patch.

[Carsten Langgaard <carstenl@mips.com>]

Ralf Baechle wrote:

> On Mon, Jun 24, 2002 at 11:07:24AM +0200, Carsten Langgaard wrote:
>
> > The 'sys_syscall' syscall isn't properly implemented in the 64-bit
> > kernel (for o32 as well as n64).
> > Below is a patch, it seems to work for in the o32 case, but I haven't
> > tested the n64 version (obviously).
>
> > +/*
> > + * Do the indirect syscall syscall.
> > + * Don't care about kernel locking; the actual syscall will do it.
> > + *
> > + * XXX This is broken.
> > + */
>
> As the comment says - it's broken.  This implementation just like it's
> 32-bit predecessor don't handle the error return value correctly.  Worse,
> there's unprotected accesses to userspace which allow any user crashing
> the system ...
>

At least it makes my system work as well as for the 32-bit kernel.



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