kern/114237: kernel lock

[nst]

>Number:         114237
>Category:       kern
>Synopsis:       kernel lock
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jul 03 12:00:17 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     nst
>Release:        CURRENT
>Organization:
>Environment:
FreeBSD web 7.0-CURRENT FreeBSD 7.0-CURRENT #0: Tue Jul  3 00:00:38 JST 2007     root at web:/usr/obj/usr/src/sys/GENERIC  i386
>Description:
kernel: lock order reversal:
kernel: 1st 0xc3280090 inp (divinp) @ /usr/src/sys/modules/ipdivert/../../netinet/ip_divert.c:356
kernel: 2nd 0xc0bf0018 PFil hook read/write mutex (PFil hook read/write mutex) @ /usr/src/sys/net/pfil.c:73
kernel: KDB: stack backtrace:
kernel: db_trace_self_wrapper(c0a905d9,d51d6a38,c0781b8e,c0a92a7d,c0bf0018,...) at db_trace_self_wrapper+0x26
kernel: kdb_backtrace(c0a92a7d,c0bf0018,c0a9aedc,c0a9aedc,c0a9aec4,...) at kdb_backtrace+0x29
kernel: witness_checkorder(c0bf0018,1,c0a9aec4,49,c31932b8,...) at witness_checkorder+0x6de
kernel: _rw_rlock(c0bf0018,c0a9aec4,49,c31932b8,0,...) at _rw_rlock+0x8e
kernel: pfil_run_hooks(c0bf0000,d51d6b10,c2eb7400,2,0,...) at pfil_run_hooks+0x35
kernel: ip_output(c303ed00,0,d51d6ae4,22,0,...) at ip_output+0x862
kernel: div_send(c318e630,0,c303ed00,c2f232a0,0,...) at div_send+0x1fe
kernel: sosend_generic(c318e630,c2f232a0,d51d6be8,0,0,...) at sosend_generic+0x50d
kernel: sosend(c318e630,c2f232a0,d51d6be8,0,0,...) at sosend+0x54
kernel: kern_sendit(c3066c00,4,d51d6c64,0,0,...) at kern_sendit+0x137
kernel: sendit(0,bfbdecc1,0,c2f232a0,10,...) at sendit+0xb1
kernel: sendto(c3066c00,d51d6cfc,18,c,c0b3a078,...) at sendto+0x48
kernel: syscall(d51d6d38) at syscall+0x2b3
kernel: Xint0x80_syscall() at Xint0x80_syscall+0x20
kernel: --- syscall (133, FreeBSD ELF32, sendto), eip = 0x2814537f, esp = 0xbfbdebdc, ebp = 0xbfbeec78 ---

>How-To-Repeat:
ipfw + nat 

rc.conf
firewall_type="simple"
natd_enable="YES"

>Fix:


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