Re: [9fans] dns

[Skip Tavakkolian <skip.tavakkolian@gmail.com>]

I'm seeing dns panics about once a day. It was built from sources that
were updated about a week ago from sources.  it's a double free error.
 any ideas?

cpue% acid 7196
/proc/7196/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
acid: stk()
abort()+0x0 /sys/src/libc/9sys/abort.c:6
ppanic(p=0x3975c,fmt=0x394ec)+0x146 /sys/src/libc/port/malloc.c:166
D2B(p=0x3975c,v=0xa71f8)+0x5a /sys/src/libc/port/pool.c:968
poolfreel(v=0xa71f8,p=0x3975c)+0x20 /sys/src/libc/port/pool.c:1192
poolfree(p=0x3975c,v=0xa71f8)+0x41 /sys/src/libc/port/pool.c:1327
free(v=0xa7200)+0x23 /sys/src/libc/port/malloc.c:250
mydnsquery(qp=0x1b48e0,udppkt=0x1906c0,len=0x24,medium=0x1)+0x185
/sys/src/cmd/ndb/dnresolve.c:1032
xmitquery(qp=0x1b48e0,depth=0x1,medium=0x1,inns=0x1,obuf=0x1906c0,len=0x24)+0x227
/sys/src/cmd/ndb/dnresolve.c:1114
tcpquery(qp=0x1b48e0,waitms=0x9e4,obuf=0x1906c0,ibuf=0x21db20,depth=0x1,inns=0x1,len=0x24,req=0x4486,mp=0xdfffe36c)+0xea
/sys/src/cmd/ndb/dnresolve.c:1353
queryns(qp=0x1b48e0,obuf=0x1906c0,depth=0x1,inns=0x1,waitms=0x9e4,ibuf=0x21db20)+0x4d3
/sys/src/cmd/ndb/dnresolve.c:1428
udpquery(mntpt=0x3f0e0,qp=0x1b48e0,patient=0x0,depth=0x1,inns=0x1)+0x1b7
/sys/src/cmd/ndb/dnresolve.c:1578
netquery(depth=0x1,qp=0x1b48e0)+0x2b5 /sys/src/cmd/ndb/dnresolve.c:1660
netqueryns(qp=0x1b48e0,nsrp=0x21da60,depth=0x1)+0x1e
/sys/src/cmd/ndb/dnresolve.c:338
issuequery(class=0x1,qp=0x1b48e0,depth=0x0,name=0x18ee00,recurse=0x0)+0x1e9
/sys/src/cmd/ndb/dnresolve.c:413
dnresolve1(name=0x18ee00,type=0x1,class=0x1,req=0xdfffe740,depth=0x0,recurse=0x0)+0x25c
/sys/src/cmd/ndb/dnresolve.c:505
dnresolve(status=0x0,depth=0x0,rooted=0x1,name=0x18ee00,class=0x1,type=0x1,req=0xdfffe740,cn=0xdfffe774,recurse=0x0)+0xa8
/sys/src/cmd/ndb/dnresolve.c:198
doextquery(mp=0xdfffe760,req=0xdfffe740,recurse=0x0)+0x64
/sys/src/cmd/ndb/dnserver.c:186
dnserver(repp=0xdfffe760,reqp=0xdfffe788,rcode=0x0,srcip=0xdfffe7b0,req=0xdfffe740)+0x1fa
/sys/src/cmd/ndb/dnserver.c:83
dnudpserver(mntpt=0x3f0e0)+0x58b /sys/src/cmd/ndb/dnudpserver.c:255
main(argv=0xdfffefb0,argc=0x0)+0x319 /sys/src/cmd/ndb/dns.c:264
_main+0x31 /sys/src/libc/386/main9.s:16
acid:

On Mon, Aug 27, 2012 at 9:03 PM, erik quanstrom <quanstro@quanstro.net> wrote:
> On Mon Aug 27 22:11:14 EDT 2012, cinap_lenrek@gmx.de wrote:
>> no.
>>
>> just look at all the call sites for announce() and dial().
>
> ah, you're right about dial.  i misread that.  i incorrectly considered
> the Conn and not the DS.  both dial and announce could use a parameter
> declaring the size of the buffer.
>
> - erik
>