Date: Mon, 26 Sep 2016 05:11:47 -0700 From: David Wolfskill <david@catwhisker.org> To: current@freebsd.org Subject: Panic @306337: Duplicate free of 0xfffff8000ef61500 from zone 0xfffff8000772b000(mbuf) slab 0xfffff8000ef61f90(5) Message-ID: <20160926121147.GO1069@albert.catwhisker.org>
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Source upgrade from r306307 to r306337 completed OK; this was on build
machine (laptop is "Installing everything" as I type). Serial console
(on panicked build machine) reads:
=2E..
Setting hostname: freebeast.catwhisker.org.
Setting up harvesting: [UMA],[FS_ATIME],SWI,INTERRUPT,NET_NG,NET_ETHER,NET_=
TUN,MOUSE,KEYBOARD,ATTACH,CACHED
Feeding entropy: .
Starting Network: lo0 re0.
lo0: flags=3D8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=3D600003<RXCSUM,TXCSUM,RXCubt0 on uhub0
ubt0: <Broadcom Corp BCM43142A0, rev 2.00/1.12, addr 3> on usbus0
SUM_IPV6,TXCSUM_random: harvesting attach, 8 bytes (4 bits) from ubt0
IPV6>
inet6 ::1 prefixlen 128=20
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2=20
inet 127.0.0.1 WARNING: attempt to domain_add(bluetooth) after doma=
infinalize()
netmask 0xff0000WARNING: attempt to domain_add(netgraph) after domainfinali=
ze()
00=20
nd6 options=3D21<PERFORMNUD,AUTO_LINKLOCAL>
groups: lo=20
re0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=3D8209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,W=
OL_MAGIpanic: Duplicate free of 0xfffff8000ef61500 from zone 0xfffff8000772=
b000(mbuf) slab 0xfffff8000ef61f90(5)
cpuid =3D 2
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe085dc95=
700
vpanic() at vpanic+0x182/frame 0xfffffe085dc95780
panic() at panic+0x43/frame 0xfffffe085dc957e0
uma_dbg_free() at uma_dbg_free+0xee/frame 0xfffffe085dc95810
uma_zfree_arg() at uma_zfree_arg+0x64/frame 0xfffffe085dc95860
m_freem() at m_freem+0x90/frame 0xfffffe085dc95880
sendit() at sendit+0x1c8/frame 0xfffffe085dc958d0
sys_sendmsg() at sys_sendmsg+0x61/frame 0xfffffe085dc95930
amd64_syscall() at amd64_syscall+0x314/frame 0xfffffe085dc95ab0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe085dc95ab0
--- syscall (28, FreeBSD ELF64, sys_sendmsg), rip =3D 0x8009672ba, rsp =3D =
0x7fffffffe588, rbp =3D 0x7fffffffe690 ---
KDB: enter: panic
[ thread pid 526 tid 100120 ]
Stopped at kdb_enter+0x3b: movq $0,kdb_why
db>=20
I can leave the machine in this state & perform "directed pokes" at it,
given appropriate clues.
I'm about to try rebooting laptop (just finished similar upgrade);
I'll report back whether it behaves similarly or not, but I don't
expect to be able to leave it panicked (as I use it to access
everything else ).
=2E..
Eh; I decided to defer sending this until I tried the laptop: it
had a similar panic, just after starting powerd. On the laptop,
when it's running stable/11, the next things to pop up are the
startup messages for hald (which the build machine does not have)
and then sshd (which each machine runs).
The build machine runs a GENERIC kernel; laptop runs a slightly-customized
kernel (includes GENERIC & tweaks from there).
I tried "panic" at the laptop's "db> " prompt, but I have no crash dump.
Peace,
david
--=20
David H. Wolfskill david@catwhisker.org
Those who would murder in the name of God or prophet are blasphemous coward=
s.
See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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