uvm_fault(fffffd806b7c9740,c9ed3b8e000,0,2) at uvm_fault+0x159 sys/uvm/uvm_fault.c:673
upageflttrap(ffff8000348bcd20,c9ed3b8e000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff8000348bcd20) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7b6b10ff2060, 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(fffffd806ab3aca8,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806ab3ac90,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806ab3ac90,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd806ad24570,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd806ad24570,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff8000300a9df8) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
namei(ffff8000300a9df8) at namei+0x7aa sys/kern/vfs_lookup.c:250
unp_connect(ffff8000014eade8,fffffd805ef0e900,ffff80003c52dc68) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868
uipc_dgram_send(ffff8000014eade8,fffffd805e1ea800,fffffd805ef0e900,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607
sosend(ffff8000014eade8,fffffd805ef0e900,ffff8000300aa078,0,0,8) at sosend+0x804
sendit(ffff80003c52dc68,3,ffff8000300aa1f0,8,ffff8000300aa2b0) at sendit+0x721 sys/kern/uipc_syscalls.c:779
sys_sendmsg(ffff80003c52dc68,ffff8000300aa360,ffff8000300aa2b0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597
syscall(ffff8000300aa360) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000300aa360) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa2e209aa970, count: -15