5.2-CURRENT (08/05): kldunload if_tap.ko panic

Jeremy Chadwick freebsd at jdc.parodius.com
Thu Sep 2 22:37:19 PDT 2004

Possibly this can be ignored, since it's 5.2-CURRENT from August 5th,
but still, thought it would be worth posting "just in case".  Or
possibly it's already been fixed somewhere else.

medusa# kldload if_tap.ko

{...nothing done here other than an ifconfig...}

medusa# kldunload if_tap.ko

{...panic occurs...}
{...on serial console...}

db> trace
strcmp(c063cab4,c4c8dd76,c063cbdd,4e3,c24dc0c8) at strcmp+0x9
enroll(c063cab4,c06636fc,c063cbdd,20b,c24dc0c8) at enroll+0x8a
witness_init(c24dc0c8,24,71a,c24dc000,c24dc000) at witness_init+0x17c
mtx_init(c24dc0c8,c063cab4,0,0,0) at mtx_init+0xe4
soalloc(1,0,c063f851,e0,c25c0af8) at soalloc+0x56
sonewconn(c22dcc58,2,c0644f49,222,c24bd824) at sonewconn+0x89
syncache_socket(c25c0af8,c22dcc58,c3d43800,2f8,c2145024) at
syncache_expand(db185b9c,c24bd824,db185b98,c3d43800,ea0c) at
tcp_input(c3d43800,14,c1f18800,1,200000a) at tcp_input+0x6a9
ip_input(c3d43800,0,c0642d38,96,c06baa78) at ip_input+0x76b
netisr_processqueue(c06baa78,0,c0642d38,fe,c1ebc080) at
swi_net(0,0,c06372ef,263,0) at swi_net+0xa1
ithread_loop(c1e60b80,db185d48,c06370da,32b,c1e60b80) at
fork_exit(c04a04eb,c1e60b80,db185d48) at fork_exit+0xc7
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xdb185d7c, ebp = 0 ---
db> panic
panic: from debugger
cpuid = 0;
boot() called on cpu#0
Uptime: 23d1h43m5s

Other details kinda-sorta can't be provided, since I need to bring this
box up ASAP, but I'll provide any other information I can.

| Jeremy Chadwick                                 jdc at parodius.com |
| Parodius Networking                        http://www.parodius.com/ |
| UNIX Systems Administrator                   Mountain View, CA, USA |
| Making life hard for others since 1977.                             |

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