6.2-PRE: Fatal Trap?

Karol Kwiatkowski freebsd at orchid.homeunix.org
Sat Dec 30 06:12:14 PST 2006

Ivan Voras wrote:
> Karol Kwiatkowski wrote:
>> This works: FreeBSD 6.2-PRERELEASE #0: Thu Dec 14 11:34:36 CET 2006
>> This doesn't: FreeBSD 6.2-PRERELEASE #0: Sat Dec 30 11:27:11 CET 2006
>> I'm not sure it that's all that matters, I can supply more information
>> if needed.
> Yes, you'll need to send at least a kernel stack backtrace. See here:
> http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-online-ddb.html
> Get it to start the debugger on panic and post the backtrace (bt).

Thanks for the link, I hope I've done it right. Here it is:

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x74
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc055d18d
stack pointer           = 0x28:0xe989dbbc
frame pointer           = 0x28:0xe989dbc0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 637 (ntpd)
[thread pid 637 tid 100059 ]
Stopped at      turnstile_setowner+0xd: movl    0x74(%ecx),%eax
db> bt
Tracing pid 637 tid 100059 td 0xc4de2780
turnstile_setowner(c4de9240,0,c4dc9240,c07201e0,c5102090,...) at
turnstile_wait(c5101090,0,c5101000,c07234e0,e989dc24,...) at
_mtx_lock_sleep(c5102090,c4de2780,0,0,0,...) at _mtx_lock_sleep+0xb4
in_pcballoc(c4e892c8,c07234e0,10000,c06c8de5,38,...) at in_pcballoc+0xbe
tcp_attach(c4e892c8,c4e8933c,c06c8de5,0,c4e892c8,...) at tcp_attach+0x58
tcp_usr_attach(c4e892c8,0,c4de2780,0,0,...) at tcp_usr_attach+0x63
socreate(2,e989dcb8,1,0,c4ab1c90,...) at socreate+0x167
socket(c4de2780,e989dd04,c,c4de2780,80d3000,...) at socket+0xb3
syscall(3b,3b,3b,0,7,...) at syscall+0x380
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (97, FreeBSD ELF32, socket), eip = 0x282939d3, esp =
0xbfbfeb1c, ebp = 0xbfbfebf8 ---
db >



Karol Kwiatkowski  <freebsd at orchid dot homeunix dot org>
OpenPGP: http://www.orchid.homeunix.org/carlos/gpg/0x06E09309.asc

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