panic on boot

[Tim Kientzle]

On Sep 3, 2014, at 6:51 AM, Tim Kientzle <tim at kientzle.com> wrote:

> 
> On Sep 2, 2014, at 1:13 PM, Garrett Cooper <yaneurabeya at gmail.com> wrote:
> 
>> On Tue, Sep 2, 2014 at 9:47 AM, AN <andy at neu.net> wrote:
>>> FreeBSD FBSD11 11.0-CURRENT FreeBSD 11.0-CURRENT #47 r269949: Wed Aug 13
>>> 14:18:28 EDT 2014     root at FBSD11:/usr/obj/usr/src/sys/MYKERNEL  amd64
>>> 
>>> Trying to rebuild the system at r270973
>>> I get a kernel panic on boot.  I am able to boot into kernel.old at r269949
>>> and the system is functional.  Is anyone else seeing a panic on boot at a
>>> recent svn update?
>> 
>>   Could you please provide the traceback?
> 
> I’m also seeing panics at boot on BBB (armv6) with a kernel built from r270779.  Old kernel from r270339 still works.

Here’s what I’m seeing at boot on BBB with r270779:

… usual kernel boot messages ...
Trying to mount root from ufs:/dev/mmcsd0s2a [rw,noatime]...
warning: no time-of-day clock registered, system time will not be set accurately
Setting hostuuid: aeaa664b-1739-11e4-8e30-7c669d6ce14d.
Setting hostid: 0x0318d0fa.
No suitable dump device was found.
Entropy harvesting: interrupts ethernet point_to_point swi.
Starting file system checks:
/dev/mmcsd0s2a: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/mmcsd0s2a: clean, 1982743 free (62311 frags, 240054 blocks, 1.6% fragmentation)
Mounting local file systems:.
/etc/rc: WARNING: $swapfile is obsolete.  Ignored.
Writing entropy file:.
Setting hostname: bb-blue.
cpsw0: link state changed to DOWN
Starting Network: lo0 cpsw0.
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
	options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
	inet6 ::1 prefixlen 128 
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2 
	inet 127.0.0.1 netmask 0xff000000 
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
cpsw0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=8000b<RXCSUM,TXCSUM,VLAN_MTU,LINKSTATE>
	ether 7c:66:9d:6c:e1:4d
	media: Ethernet autoselect (none)
	status: no carrier
	nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
Starting devd.
panic: Undefined instruction in kernel.

KDB: enter: panic
[ thread pid 284 tid 100069 ]
Stopped at      $d:     ldrb    r15, [r15, r15, ror r15]!
db> bt
Tracing pid 284 tid 100069 td 0xc2b15c80
db_trace_self() at db_trace_self
         pc = 0xc054d7a8  lr = 0xc0231ab8 (db_stack_trace+0xf4)
         sp = 0xde69d2f8  fp = 0xde69d310
        r10 = 0xc0939838
db_stack_trace() at db_stack_trace+0xf4
         pc = 0xc0231ab8  lr = 0xc0231428 (db_command+0x270)
         sp = 0xde69d318  fp = 0xde69d3b8
         r4 = 0x00000000  r5 = 0x00000000
         r6 = 0x00000000
db_command() at db_command+0x270
         pc = 0xc0231428  lr = 0xc023118c (db_command_loop+0x60)
         sp = 0xde69d3c0  fp = 0xde69d3d0
         r4 = 0xc059585e  r5 = 0xc05b04e3
         r6 = 0xc0939824  r7 = 0xc064fa38
         r8 = 0xc06958e4  r9 = 0xc06958e0
db_trap() at db_trap+0xd8
         pc = 0xc0233b54  lr = 0xc039e894 (kdb_trap+0xbc)
         sp = 0xde69d500  fp = 0xde69d520
         r4 = 0x00000000  r5 = 0x00000001
         r6 = 0xc0695908  r7 = 0xc064fa38
kdb_trap() at kdb_trap+0xbc
         pc = 0xc039e894  lr = 0xc0563c80 (undefinedinstruction+0x298)
         sp = 0xde69d528  fp = 0xde69d598
         r4 = 0x00000000  r5 = 0x00000000
         r6 = 0xc0563938  r7 = 0xe7ffffff
         r8 = 0xc2b15c80  r9 = 0xc039e164
        r10 = 0xde69d5a0
undefinedinstruction() at undefinedinstruction+0x298
         pc = 0xc0563c80  lr = 0xc054f490 (exception_exit)
         sp = 0xde69d5a0  fp = 0xde69d5f8
         r4 = 0xc05b0538  r5 = 0xde69d634
         r6 = 0xc05dc349  r7 = 0xc0687e28
         r8 = 0xc2b15c80  r9 = 0xc093b1dc
        r10 = 0xc0687c90
exception_exit() at exception_exit
         pc = 0xc054f490  lr = 0xc039e158 (kdb_enter+0x40)
         sp = 0xde69d5f0  fp = 0xde69d5f8
         r0 = 0xc06958f4  r1 = 0x00000000
         r2 = 0xc05b3eac  r3 = 0x000000aa
         r4 = 0xc05b0538  r5 = 0xde69d634
         r6 = 0xc05dc349  r7 = 0xc0687e28
         r8 = 0xc2b15c80  r9 = 0xc093b1dc
        r10 = 0xc0687c90 r12 = 0x00000000
$a() at $a
         pc = 0xc039e168  lr = 0xc03675a0 (vpanic+0xb4)
         sp = 0xde69d600  fp = 0xde69d620
         r4 = 0x00000100
vpanic() at vpanic+0xb4
         pc = 0xc03675a0  lr = 0xc0367604 (kproc_shutdown)
         sp = 0xde69d628  fp = 0xde69d62c
         r4 = 0x00000000  r5 = 0x00000000
         r6 = 0xc0563938  r7 = 0xe28fc600
         r8 = 0xc2b15c80  r9 = 0xc2eb1bd8
        r10 = 0xde69d6b8
kproc_shutdown() at kproc_shutdown
         pc = 0xc0367604  lr = 0xc0939610 (gdb_uh)
         sp = 0xde69d634  fp = 0xde69d6b0
         r4 = 0xc0367604  r5 = 0xde69d634
Unknown entry: 0
gdb_uh() at gdb_uh
         pc = 0xc0939610  lr = 0xc0939610 (gdb_uh)
         sp = 0xde69d634  fp = 0xde69d6b0
Unable to unwind into user mode