[PATCH] mips: siginfo.h: add SIGSYS details [BZ #18863]

[Joseph Myers]

On Thu, 27 Aug 2015, Markos Chandras wrote:

> >> OK.  CC to linux-mips because I see that the MIPS implementation of 
> >> copy_siginfo_to_user32 doesn't handle __SI_SYS, unlike arm64 at least, so 
> >> I suspect this won't in fact work for n32 or for o32 with a 64-bit kernel.
> > 
> > i'm getting reports of seccomp misbehavior on mips already which is what
> > started me down this glibc path.  i suspect the original port was tested
> > against o32 kernels only.
> > -mike
> > 
> 
> I have recently tested mips64 n64/n32 with the testsuite from libseccomp
> and that led me to this fix
> 
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9f161439e4104b641a7bfb9b89581d801159fec8
> 
> if you are aware of other problems (and perhaps a test to trigger them)
> that could be kernel related let me know

My observation about copy_siginfo_to_user32 missing a case was purely 
based on the kernel source code.  I've no reason to think it has anything 
to do with seccomp problems.

-- 
Joseph S. Myers
joseph@codesourcery.com