uvm_fault(fffffd806bc8ac98,8081a6a000,0,4) at uvm_fault+0x272
upageflttrap(ffff80003c4d40e0,8081a6a790) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80003c4d40e0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x82a01b68d0, count: -13
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(fffffd806f388978,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806f388960,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806f388960,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd806b668e88,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd806b668e88,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff80002a45de08) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
namei(ffff80002a45de08) at namei+0x7aa sys/kern/vfs_lookup.c:250
unp_connect(ffff800001442010,fffffd806cbb2500,ffff8000fffefc68) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868
uipc_dgram_send(ffff800001442010,fffffd806b11c900,fffffd806cbb2500,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607
sosend(ffff800001442010,fffffd806cbb2500,ffff80002a45e088,0,0,0) at sosend+0x804
sendit(ffff8000fffefc68,3,ffff80002a45e200,0,ffff80002a45e2c0) at sendit+0x721 sys/kern/uipc_syscalls.c:779
sys_sendmsg(ffff8000fffefc68,ffff80002a45e370,ffff80002a45e2c0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597
syscall(ffff80002a45e370) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a45e370) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x837ee61b00, count: -15