kern/162267: mpd kernel panic

Thu Nov 3 09:20:09 UTC 2011

>Number:         162267
>Category:       kern
>Synopsis:       mpd kernel panic
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Nov 03 09:20:08 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Alexandr Gorsky
>Release:        FreeBSD 9.0-RC1
>Organization:
NEVOSOFT
>Environment:
FreeBSD rt02.nevosoft.local 9.0-RC1 FreeBSD 9.0-RC1 #0: Wed Nov  2 13:02:37 MSK 2011     al at rt02.nevosoft.local:/usr/obj/usr/src/sys/GENERIC  i386

>Description:
When user connect to mpd5 server configured as pptp server, kernel have panic after successful authorization. In 9.0 BETA 3 it work fine.   
backtrace:


Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address   = 0x0
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc0b205a9
stack pointer           = 0x28:0xdf1b39bc
frame pointer           = 0x28:0xdf1b39f8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 2959 (arp)
trap number             = 12
panic: page fault
cpuid = 1
KDB: stack backtrace:
#0 0xc0a4ad67 at kdb_backtrace+0x47
#1 0xc0a18337 at panic+0x117
#2 0xc0d48623 at trap_fatal+0x323
#3 0xc0d486dd at trap_pfault+0xad
#4 0xc0d49465 at trap+0x465
#5 0xc0d323bc at calltrap+0x6
#6 0xc0ad03af at lla_rt_output+0x2df
#7 0xc0add937 at route_output+0x407
#8 0xc0ad9988 at raw_usend+0x48
#9 0xc0adc775 at rts_send+0x35
#10 0xc0a7e28a at sosend_generic+0x64a
#11 0xc0a7a2ff at sosend+0x3f
#12 0xc0a630a3 at soo_write+0x63
#13 0xc0a5c407 at dofilewrite+0x97
#14 0xc0a5c718 at kern_writev+0x68
#15 0xc0a5c79f at sys_write+0x4f
#16 0xc0d48c45 at syscall+0x355
#17 0xc0d32421 at Xint0x80_syscall+0x21
Uptime: 4m38s
Physical memory: 2023 MB
Dumping 193 MB: 178panic: bufwrite: buffer is not busy???
cpuid = 1
 162 146 130 114 98 82 66 50 34 18 2

Reading symbols from /boot/kernel/accf_data.ko...Reading symbols from /boot/kernel/accf_data.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/accf_data.ko
Reading symbols from /boot/kernel/accf_dns.ko...Reading symbols from /boot/kernel/accf_dns.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/accf_dns.ko
Reading symbols from /boot/kernel/accf_http.ko...Reading symbols from /boot/kernel/accf_http.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/accf_http.ko
Reading symbols from /boot/kernel/libalias.ko...Reading symbols from /boot/kernel/libalias.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/libalias.ko
Reading symbols from /boot/kernel/ipl.ko...Reading symbols from /boot/kernel/ipl.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ipl.ko
Reading symbols from /boot/kernel/if_carp.ko...Reading symbols from /boot/kernel/if_carp.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/if_carp.ko
Reading symbols from /boot/kernel/ipfw.ko...Reading symbols from /boot/kernel/ipfw.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ipfw.ko
Reading symbols from /boot/kernel/ng_socket.ko...Reading symbols from /boot/kernel/ng_socket.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_socket.ko
Reading symbols from /boot/kernel/netgraph.ko...Reading symbols from /boot/kernel/netgraph.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/netgraph.ko
Reading symbols from /boot/kernel/ng_mppc.ko...Reading symbols from /boot/kernel/ng_mppc.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_mppc.ko
Reading symbols from /boot/kernel/rc4.ko...Reading symbols from /boot/kernel/rc4.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/rc4.ko
Reading symbols from /boot/kernel/ng_tee.ko...Reading symbols from /boot/kernel/ng_tee.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_tee.ko
Reading symbols from /boot/kernel/ng_pptpgre.ko...Reading symbols from /boot/kernel/ng_pptpgre.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_pptpgre.ko
Reading symbols from /boot/kernel/ng_ksocket.ko...Reading symbols from /boot/kernel/ng_ksocket.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_ksocket.ko
Reading symbols from /boot/kernel/ng_iface.ko...Reading symbols from /boot/kernel/ng_iface.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_iface.ko
Reading symbols from /boot/kernel/ng_ppp.ko...Reading symbols from /boot/kernel/ng_ppp.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_ppp.ko
Reading symbols from /boot/kernel/ng_vjc.ko...Reading symbols from /boot/kernel/ng_vjc.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_vjc.ko
Reading symbols from /boot/kernel/ng_tcpmss.ko...Reading symbols from /boot/kernel/ng_tcpmss.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/ng_tcpmss.ko
#0  doadump (textdump=1) at pcpu.h:244
244     pcpu.h: No such file or directory.
        in pcpu.h
(kgdb) backtrace
#0  doadump (textdump=1) at pcpu.h:244
#1  0xc0a180da in kern_reboot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:442
#2  0xc0a18371 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:607
#3  0xc0d48623 in trap_fatal (frame=0xdf1b397c, eva=0) at /usr/src/sys/i386/i386/trap.c:972
#4  0xc0d486dd in trap_pfault (frame=0xdf1b397c, usermode=0, eva=0) at /usr/src/sys/i386/i386/trap.c:836
#5  0xc0d49465 in trap (frame=0xdf1b397c) at /usr/src/sys/i386/i386/trap.c:555
#6  0xc0d323bc in calltrap () at /usr/src/sys/i386/i386/exception.s:168
#7  0xc0b205a9 in in_lltable_lookup (llt=0xc5993b00, flags=Variable "flags" is not available.
) at /usr/src/sys/netinet/in.c:1445
#8  0xc0ad03af in lla_rt_output (rtm=0xc61f0800, info=0xdf1b3a70) at if_llatbl.h:202
#9  0xc0add937 in route_output (m=0xc5c6c200, so=0xc62df680) at /usr/src/sys/net/rtsock.c:638
#10 0xc0ad9988 in raw_usend (so=0xc62df680, flags=Variable "flags" is not available.
) at /usr/src/sys/net/raw_usrreq.c:238
#11 0xc0adc775 in rts_send (so=0xc62df680, flags=0, m=0xc5c6c200, nam=0x0, control=0x0, td=0xc59c2000) at /usr/src/sys/net/rtsock.c:386
#12 0xc0a7e28a in sosend_generic (so=0xc62df680, addr=0x0, uio=0xdf1b3c48, top=0xc5c6c200, control=0x0, flags=0, td=0xc59c2000) at /usr/src/sys/kern/uipc_socket.c:1303
#13 0xc0a7a2ff in sosend (so=0xc62df680, addr=0x0, uio=0xdf1b3c48, top=0x0, control=0x0, flags=0, td=0xc59c2000) at /usr/src/sys/kern/uipc_socket.c:1347
#14 0xc0a630a3 in soo_write (fp=0xc610c2a0, uio=0xdf1b3c48, active_cred=0xc557a800, flags=0, td=0xc59c2000) at /usr/src/sys/kern/sys_socket.c:102
#15 0xc0a5c407 in dofilewrite (td=0xc59c2000, fd=3, fp=0xc610c2a0, auio=0xdf1b3c48, offset=-1, flags=0) at file.h:262
#16 0xc0a5c718 in kern_writev (td=0xc59c2000, fd=3, auio=0xdf1b3c48) at /usr/src/sys/kern/sys_generic.c:449
#17 0xc0a5c79f in sys_write (td=0xc59c2000, uap=0xdf1b3cec) at /usr/src/sys/kern/sys_generic.c:365
#18 0xc0d48c45 in syscall (frame=0xdf1b3d28) at subr_syscall.c:131
#19 0xc0d32421 in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:266
#20 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)

>How-To-Repeat:
connect to mpd server configured as pptp
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: