tags 341773 confirmed
thanks

I've reproduced this problem and I'm working on solution. I've noticed the 
libnss-db package breaks only on amd64 architecture or perhaps on 64-bit 
archs. Thanks for report.
On Friday 02 December 2005 23:50, Daniel Stone wrote: 
> Package: libnss-db
> Version: 2.2.3pre1-1
> Severity: critical
> Justification: smashes entire system with WORLD-ENDING levels of breakage
>
> Hi,
> Using libnss-db from sid results in some rather, er, unpleasant
> behaviour.  With the group files below, and 'group: compat db' in
> nsswitch.conf, anything that attempts to deal with groups, segfaults.
> This includes OpenSSH (so not even root can log in), and su.  The end
> result is that you better well have rockin' remote management so you can
> reboot your machine and boot with init=/bin/sh.
>
> Downgrading to libnss-db 2.2-6.3 works just fine.
>
> This is the backtrace generated with libc6-dbg:
> (gdb) bt f
> #0  *__GI__nss_files_parse_grent (
>     line=0x7fbffff3f6
> "jrfonseca,kaleb,ago,stukreit,cworth,keithp,clee,kem,branden,jkolb,doursse,
>jkj,bogdand,sndirsch,jbarnes,mhopf,spyderous,aplattner,benh,philipl",
> result=0x7fbffff6b0, data=0x7fbffff260, datalen=1024,
> errnop=0x622c72656e747461) at files-parse.c:208
>         list = (char **) 0x7fbffff660
>         p = Variable "p" is not available.
> (gdb) print *data
> $7 = {linebuffer = 0x7fbffff260 "xorg"}
> (gdb) print *result
> $8 = {gr_name = 0x7fbffff260 "xorg", gr_passwd = 0x7fbffff265 "x",
>   gr_gid = 801, gr_mem = 0x7fbffff290}
> (gdb) print **list
> $9 = 0 '\0'
> (gdb) print *errnop
> Cannot access memory at address 0x622c72656e747461
>
> Notice how errnop in particular seems to be wildly off.
>
> Also, I don't claim to know the internals of exactly how it works, but
> line is badly truncated; this is the original:
> xorg:x:801:daniels,gisburn,eich,jg,pma,pascal,twini,jacotton,unichrome,alan
>h,alanc,amirbukhari,hyu,ldelgass,fabbione,brianp,nakee,mharris,deronj,daenze
>r,keithw,kendallb,harold,torrey,zack,ewalsh,earle,wt,bastian,faith,idr,krh,n
>olan,jdennis,ajax,josh,takuma,mark,volodya,adg,anderson,sandmann,vektor,syrj
>ala,fxkuehl,zakki,anholt,alan,libv,sroland,erdi,viewtouch,agd5f,kuhn,jhobson
>,herrb,davidr,lars,airlied,jrfonseca,kaleb,ago,stukreit,cworth,keithp,clee,k
>em,branden,jkolb,doursse,jkj,bogdand,sndirsch,jbarnes,mhopf,spyderous,aplatt
>ner,benh,philipl
>
> This is an amd64 system.
>
> Original TDB file:
> http://annarchy.freedesktop.org/~daniels/group.tdb
> Processed DB file:
> http://annarchy.freedesktop.org/~daniels/group.db
>
> Cheers,
> Daniel


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