[linux-lvm] lvcreate segfault in vg_setup_pointers_for_snapshots

[Jason A. Lixfeld]

Hmm, 1.0.1-rc2 segfaults aswell :/  Perhaps it's something else.  I'm
using the stock compiler from 7.1.  Not too sure what it is or how to
find it.

> -----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 10:01 AM
> To: linux-lvm at sistina.com
> Subject: RE: [linux-lvm] lvcreate segfault in 
> vg_setup_pointers_for_snapshots
> 
> 
> 
> 
> 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
> > > 
> > 
> > 
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm at sistina.com 
> > http://lists.sistina.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
> > 
> 
> 
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