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Re: [PATCH] mips: siginfo.h: add SIGSYS details [BZ #18863]
- From: Joseph Myers <joseph at codesourcery dot com>
- To: Markos Chandras <Markos dot Chandras at imgtec dot com>
- Cc: Mike Frysinger <vapier at gentoo dot org>, <libc-alpha at sourceware dot org>, <linux-mips at linux-mips dot org>
- Date: Thu, 27 Aug 2015 09:41:16 +0000
- Subject: Re: [PATCH] mips: siginfo.h: add SIGSYS details [BZ #18863]
- Authentication-results: sourceware.org; auth=none
- References: <1440563342-5411-1-git-send-email-vapier at gentoo dot org> <alpine dot DEB dot 2 dot 10 dot 1508260918240 dot 26898 at digraph dot polyomino dot org dot uk> <20150826171017 dot GD3116 at vapier> <55DEC3B9 dot 1070105 at imgtec dot com>
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
> 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