Bug#852814: Fails at 'policy-rc.d already exists'

[Guido Günther]

On Fri, Jan 27, 2017 at 05:23:39PM +0000, Thorsten Glaser wrote:
> Guido GЭnther dixit:
> >On Fri, Jan 27, 2017 at 04:40:13PM +0000, Thorsten Glaser wrote:
> >> Guido Gц╪nther dixit:
> >>
> >> ># echo $?
> >> >139
> >>
> >> That is signal 11, i.e. segfault; is your RAM good?
> >
> >It sure is. ButБ─╕
> >
> >with 0.228.3:
> >
> >  Jan 27 15:52:23 bogon kernel: dpkg-architectu[13253] vsyscall attempted with vsyscall=none ip:ffffffffff600400 cs:33 sp:7ffc46aa0158 ax:ffffffffff600400 si:0 di:1f38590
> >  Jan 27 15:52:47 bogon kernel: dpkg-architectu[13345] vsyscall attempted with vsyscall=none ip:ffffffffff600400 cs:33 sp:7ffeae684aa8 ax:ffffffffff600400 si:0 di:dfe590
> 
> Ah. This is documented though, I’ve even added it here:
> 
> | http://www.mirbsd.org/cvs.cgi/contrib/hosted/tg/deb/pbuilderrc?rev=HEAD

and reported here

   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=849572

> 
> # To use a chroot with glibc 2.13 or older (Debian wheezy or older)
> # with Linux 4.8 or up, you may need to add this to /etc/default/grub:
> # GRUB_CMDLINE_LINUX="rootdelay=5 syscall.x32=y vsyscall=emulate net.ifnames=0 kaslr"
> # (well, the “vsyscall=emulate” part, although the others don’t hurt)
> 
> >This was reported properly as http download error (since apt noticed
> >that it's helper died) in 0.227. But 0.228.3 simply dies without any
> >hint what the error could be and where it happened to the user. It would
> >be great if pbuilder would at least print the command that failed.
> 
> Agreed. I’d lower the severity since apparently, the vsyscall=none
> switch was reverted (especially as wheezy is still very much in use).

I'll let the maintainers decide if they want to treat is as a regression
or enhancement / wishlist bug .
Cheers,
 -- Guido