panic: assertion: so->so_port == &curthread->td_msgport in tcp_input

[Peter Avalos <peter@xxxxxxxxxxxx>]

I got this panic today on a box running master from Feb. 4th:

panic: assertion: so->so_port == &curthread->td_msgport in tcp_input

(kgdb) bt
#0  _get_mycpu (di=0xc0400c80) at ./machine/thread.h:83
#1  md_dumpsys (di=0xc0400c80) at /usr/src/sys/platform/pc32/i386/dump_machdep.c:264
#2  0xc0197de2 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:893
#3  0xc01983a2 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:388
#4  0xc019866d in panic (fmt=0xc03525b8 "assertion: %s in %s") at /usr/src/sys/kern/kern_shutdown.c:799
#5  0xc022a433 in tcp_input (mp=0xd8a5ecb4, offp=0xd8a5ecb0, proto=6) at /usr/src/sys/netinet/tcp_input.c:1094
#6  0xc0223884 in transport_processing_oncpu (m=0x0, hlen=20, ip=0xe6f93010) at /usr/src/sys/netinet/ip_input.c:396
#7  0xc0225655 in ip_input (m=0xe09a5600) at /usr/src/sys/netinet/ip_input.c:961
#8  0xc022567d in ip_input_handler (msg=0xe09a561c) at /usr/src/sys/netinet/ip_input.c:417
#9  0xc0215750 in netmsg_service_loop (arg=0x0) at /usr/src/sys/net/netisr.c:307
#10 0xc01a1580 in lwkt_deschedule_self (td=Cannot access memory at address 0x8
) at /usr/src/sys/kern/lwkt_thread.c:276

It happens when I restart nginx.  I tried killing nginx, then waiting for
about 3 minutes.  A few seconds after restarting nginx, I get the panic.
Files can be downloaded from:
http://www.theshell.com/~pavalos/crash/ylem-crash6.tar.xz

--Peter

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