[linux-lvm] lvcreate segfault in vg_setup_pointers_for_snapshots

[Jason A. Lixfeld]

I managed to get the tools to compile and work with kgcc 2.91.66.

> -----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 10:24 AM
> To: linux-lvm at sistina.com
> Subject: RE: [linux-lvm] lvcreate segfault in 
> vg_setup_pointers_for_snapshots
> 
> 
> 
> 
> 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
> > > 
> > 
> > 
> > _______________________________________________
> > 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
>