Re: LOR on RELENG_6, beta 5

On Wed, Sep 21, 2005 at 10:45:31AM -0700, Vinod Kashyap wrote:
> > -----Original Message-----
> > From: Kris Kennaway [mailto:kris_at_obsecurity.org] 
> > Sent: Wednesday, September 21, 2005 10:41 AM
> > To: Mike Tancsa
> > Cc: freebsd-current_at_freebsd.org; vkashyap_at_freebsd.org
> > Subject: Re: LOR on RELENG_6, beta 5
> > 
> > On Wed, Sep 21, 2005 at 01:15:28PM -0400, Mike Tancsa wrote:
> > > 
> > > lock order reversal
> > >  1st 0xc295a090 inp (divinp) _at_ /usr/src/sys/netinet/ip_divert.c:327
> > >  2nd 0xc28d9150 ipsec request (ipsec request) _at_
> > > /usr/src/sys/netipsec/ipsec_output.c:354
> > > KDB: stack backtrace:
> > > kdb_backtrace(0,ffffffff,c0763e30,c0763e58,c072b204) at 
> > > kdb_backtrace+0x29
> > > witness_checkorder(c28d9150,9,c06fc8ea,162) at 
> > > witness_checkorder+0x564
> > > _mtx_lock_flags(c28d9150,0,c06fc8ea,162,0) at _mtx_lock_flags+0x5b
> > > ipsec4_process_packet(c28f9800,c28d9100,22,0,c26c8e00) at
> > > ipsec4_process_packet+0x45
> > > ip_output(c28f9800,0,e740fb28,22,0) at ip_output+0x74f
> > > div_output(c294b858,c28f9800,c23bd440,0,e740fc08) at 
> > div_output+0x185
> > > div_send(c294b858,0,c28f9800,c23bd440,0) at div_send+0x3f
> > > sosend(c294b858,c23bd440,e740fc3c,c28f9800,0) at sosend+0x5e3
> > > kern_sendit(c2711d80,3,e740fcbc,0,0) at kern_sendit+0x104
> > > sendit(c2711d80,3,e740fcbc,0,bfbdec04) at sendit+0x163
> > > sendto(c2711d80,e740fd04,6,0,296) at sendto+0x4d
> > > syscall(3b,3b,3b,2,64) at syscall+0x22f
> > > Xint0x80_syscall() at Xint0x80_syscall+0x1f
> > > --- syscall (133, FreeBSD ELF32, sendto), eip = 0x280c5d97, esp = 
> > > 0xbfbdeb0c, ebp = 0xbfbeebb8 ---
> > > 
> > > I am able to replicate this on the box without too much effort.  
> > > Unfortunately, it doesnt want to dump on my twe device for 
> > some reason 
> > > despite doing a dumpon -v /dev/twed0s1b
> > 
> > Dumps on twe seem to be broken.  vinod, have you made any 
> > progress on this since last we spoke?
> > 
> 
> Like I told you earlier, I tried reproducing the problem both on 7
> -CURRENT,
> and RELENG_6, but couldn't.  Dumping on twe seems to work just fine.

And what of those of us for whom dumping does not, in fact, work fine?

Kris