Re: panic with tcpdrop

Sorry for not send this before.

The connection that i kill was in TIME_WAIT or FIN_WAIT_? state

Any other information, please, tell me.
Javier

(kgdb) bt
#0  doadump () at pcpu.h:195
#1  0xc0788594 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
#2  0xc07887bf in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:563
#3  0xc09ccb43 in trap_fatal (frame=0xd66589c0, eva=24) at 
/usr/src/sys/i386/i386/trap.c:872
#4  0xc09cd4dd in trap (frame=0xd66589c0) at 
/usr/src/sys/i386/i386/trap.c:277
#5  0xc09b68fb in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#6  0xc07b8644 in turnstile_broadcast (ts=0x0, queue=0) at 
/usr/src/sys/kern/subr_turnstile.c:834
#7  0xc077ba02 in _mtx_unlock_sleep (m=0xc4c35288, opts=0, file=0x0, 
line=0) at /usr/src/sys/kern/kern_mutex.c:593
#8  0xc086ba27 in sysctl_drop (oidp=0xc0b0d2e0, arg1=0x0, arg2=0, 
req=0xd6658ba4) at /usr/src/sys/netinet/tcp_subr.c:2057
#9  0xc0791a87 in sysctl_root (oidp=Variable "oidp" is not available.
) at /usr/src/sys/kern/kern_sysctl.c:1306
#10 0xc0791bd4 in userland_sysctl (td=0xc38c0210, name=0xd6658c14, 
namelen=4, old=0x0, oldlenp=0x0, inkernel=0, new=0xbfbfeb90, newlen=256,
     retval=0xd6658c10, flags=0) at /usr/src/sys/kern/kern_sysctl.c:1401
#11 0xc07928fd in __sysctl (td=0xc38c0210, uap=0xd6658cfc) at 
/usr/src/sys/kern/kern_sysctl.c:1336
#12 0xc09cd0f5 in syscall (frame=0xd6658d38) at 
/usr/src/sys/i386/i386/trap.c:1008
#13 0xc09b6960 in Xint0x80_syscall () at 
/usr/src/sys/i386/i386/exception.s:196
#14 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)

(kgdb) f 8
#8  0xc086ba27 in sysctl_drop (oidp=0xc0b0d2e0, arg1=0x0, arg2=0, 
req=0xd6658ba4) at /usr/src/sys/netinet/tcp_subr.c:2057
2057                    INP_UNLOCK(inp);
(kgdb) l
2052                    } else if (!(inp->inp_vflag & INP_DROPPED) &&
2053                               !(inp->inp_socket->so_options & 
SO_ACCEPTCONN)) {
2054                            tp = intotcpcb(inp);
2055                            tcp_drop(tp, ECONNABORTED);
2056                    }
2057                    INP_UNLOCK(inp);
2058            } else
2059                    error = ESRCH;
2060            INP_INFO_WUNLOCK(&tcbinfo);
2061            return (error);
(kgdb)

> 
> On Fri, 23 Nov 2007, Javier wrote:
> 
>> Hi, a got a panic with tcpdrop command.
> 
> Javier,
> 
> I see you may have a coredump -- could you provide a backtrace from gdb 
> for the below?  Specifically, I'd like to know what line 
> sysctl_drop+0x207 is.
> 
> Thanks,
> 
> Robert N M Watson
> Computer Laboratory
> University of Cambridge
> 
> 
>> Regards,
>> Javier
>>
>> uname  -a
>> FreeBSD odin.valhala 7.0-BETA3 FreeBSD 7.0-BETA3 #0: Mon Nov 19 
>> 15:40:35 ART 2007
>>
>> Fatal trap 12: page fault while in kernel mode
>> fault virtual address   = 0x18
>> fault code              = supervisor read, page not present
>> instruction pointer     = 0x20:0xc07b8644
>> stack pointer           = 0x28:0xd6658a00
>> frame pointer           = 0x28:0xd6658a0c
>> code segment            = base 0x0, limit 0xfffff, type 0x1b
>>                       = DPL 0, pres 1, def32 1, gran 1
>> processor eflags        = resume, IOPL = 0
>> current process         = 77347 (tcpdrop)
>> trap number             = 12
>> panic: page fault
>> KDB: stack backtrace:
>> db_trace_self_wrapper(c0a5f1ea,d66588e0,c078878a,c0a5d5f4,c0b5bcc0,...) 
>> at db_trace_self_wrapper+0x26
>> kdb_backtrace(c0a5d5f4,c0b5bcc0,c0a1fb8c,d66588ec,d66588ec,...) at 
>> kdb_backtrace+0x29
>> panic(c0a1fb8c,c0a7c54d,c39ac220,1,1,...) at panic+0xaa
>> trap_fatal(c0a7c44f,c,246,c38c0210,c,...) at trap_fatal+0x303
>> trap(d66589c0) at trap+0x10d
>> calltrap() at calltrap+0x6
>> --- trap 0xc, eip = 0xc07b8644, esp = 0xd6658a00, ebp = 0xd6658a0c ---
>> turnstile_broadcast(0,0,c4c351f8,0,d6658b54,...) at 
>> turnstile_broadcast+0x34
>> _mtx_unlock_sleep(c4c35288,0,0,0,e103,...) at _mtx_unlock_sleep+0x52
>> sysctl_drop(c0b0d2e0,0,0,d6658ba4,d6658ba4,...) at sysctl_drop+0x207
>> sysctl_root(d6658ba4,100,1,c0937524,c1fbb1e0,...) at sysctl_root+0x127
>> userland_sysctl(c38c0210,d6658c14,4,0,0,...) at userland_sysctl+0x134
>> __sysctl(c38c0210,d6658cfc,18,c38c0210,d6658d2c,...) at __sysctl+0xdd
>> syscall(d6658d38) at syscall+0x335
>> Xint0x80_syscall() at Xint0x80_syscall+0x20
>> --- syscall (202, FreeBSD ELF32, __sysctl), eip = 0x28148a3b, esp = 
>> 0xbfbfe32c, ebp = 0xbfbfe358 ---
>> Uptime: 2d20h23m41s
>> Physical memory: 495 MB
>> Dumping 129 MB: 114 98 82 66 50 34 18 2
>>
>> #0  doadump () at pcpu.h:195
>> 195     pcpu.h: No such file or directory.
>>       in pcpu.h
>> (kgdb)
>>
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