uvm_fault(fffffd806ade8ad0,fcfdd758000,0,2) at uvm_fault+0x19c sys/uvm/uvm_fault.c:676
upageflttrap(ffff8000334a4b50,fcfdd758098) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff8000334a4b50) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x70767c3e8ce0, count: -15
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:437
witness_checkorder(fffffd806dd3b528,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806dd3b510,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806dd3b510,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd805fa66a30,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd805fa66a30,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff80003c523e28) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
namei(ffff80003c523e28) at namei+0x7aa sys/kern/vfs_lookup.c:250
unp_connect(ffff8000014945b0,fffffd806c186d00,ffff80003c508f60) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868
uipc_dgram_send(ffff8000014945b0,fffffd8075545000,fffffd806c186d00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607
sosend(ffff8000014945b0,fffffd806c186d00,ffff80003c5240a8,0,0,8) at sosend+0x804
sendit(ffff80003c508f60,8,ffff80003c524220,8,ffff80003c5242e0) at sendit+0x721 sys/kern/uipc_syscalls.c:779
sys_sendmsg(ffff80003c508f60,ffff80003c524390,ffff80003c5242e0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597
syscall(ffff80003c524390) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c524390) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc16e1e3c850, count: -15