[linux-lvm] lvcreate segfault in vg_setup_pointers_for_snapshots
Jason A. Lixfeld
jlixfeld at andromedas.com
Thu Oct 4 14:01:09 UTC 2001
Since I'm having trouble with rc-4 can I use another version that is
still compatible with everything and won't segfault!? :)
> -----Original Message-----
> From: linux-lvm-admin at sistina.com
> [mailto:linux-lvm-admin at sistina.com] On Behalf Of Jason A. Lixfeld
> Sent: October 4, 2001 7:39 AM
> To: linux-lvm at sistina.com
> Subject: RE: [linux-lvm] lvcreate segfault in
> vg_setup_pointers_for_snapshots
>
>
>
>
> Ok, done...
>
> http://www.andromedas.com/lvm/session.log
>
> It's 35MB and I'm only on a 3MB DSL connection so it's gonna
> take a while to load! :)
>
> > -----Original Message-----
> > From: linux-lvm-admin at sistina.com
> > [mailto:linux-lvm-admin at sistina.com] On Behalf Of Andreas Dilger
> > Sent: October 4, 2001 2:05 AM
> > To: linux-lvm at sistina.com
> > Subject: Re: [linux-lvm] lvcreate segfault in
> > vg_setup_pointers_for_snapshots
> >
> >
> >
> > On Oct 03, 2001 23:46 -0400, Jason A. Lixfeld wrote:
> > > Wow! Lots and LOTS of stuff!! Didn't think it was ever going to
> > > end!!
> >
> > Some of it is even useful. Maybe you can include some of the
> > stuff at the end, or put it on a web page somewhere.
> >
> > > Here's what yer looking for:
> > >
> > > #0 lv_create (vg=0x8, lv=0xbffffb74,
> > > lv_name=0xbffffb98
> > >
> >
> "????????????????????????????????\002???!???,???<???D???T???b???s???\2
> > > 01
> > > ???\214???\227???????")
> > > at lv_create_remove.c:42
> > > #1 0x0804b03d in strcpy () at ../sysdeps/generic/strcpy.c:31
> >
> > So it is dereferencing an uninitialized string (or so it
> > appears). It may be that the string is corrupted elsewhere,
> > however. I'm surprised that
> > lv_check_name() in lv_create_remove() didn't catch this.
> > However, this may also be a red herring, since sometimes GDB
> > shows junk.
> >
> > It is also suspicious because the lv and lv_name pointers are
> > 0x24 apart, which shouldn't be the case since lv_name is the
> > first item in lv_t.
> >
> > > #2 0x4006c177 in __libc_start_main (main=0x8049390 <strcpy+384>,
> > > argc=8, ubp_av=0xbffffb74, init=0x8048e88 <_init>,
> > > fini=0x804b4d0 <_fini>, rtld_fini=0x4000e184 <_dl_fini>,
> > > stack_end=0xbffffb6c) at ../sysdeps/generic/libc-start.c:129
> >
> > If you try running with "export MALLOC_CHECK_=2 gdb
> > <path>/lvcreate", it may give more indication as to where the
> > actual corruption is happening.
> >
> > I just recompiled the tools, and did not have any problems
> > with lvcreate, so it must be something strange.
> >
> > Cheers, Andreas
> > --
> > Andreas Dilger \ "If a man ate a pound of pasta and a pound
> > of antipasto,
> > \ would they cancel out, leaving him
> still hungry?"
> > http://www-mddsp.enel.ucalgary.ca/People/adilger/
> > -- Dogbert
> >
> >
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm at sistina.com
> > http://lists.sistina.com/mailman/listinfo/linu> x-lvm
> > read the
> > LVM HOW-TO at
> > http://www.sistina.com/lvm/Pages/howto.html
> >
>
>
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