uvm_fault(fffffd807eb8bab0,dcdcfef2000,0,1) at uvm_fault+0x272
upageflttrap(ffff80003c50fcb0,dcdcfef204c) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80003c50fcb0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7f25c94ea080, 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(fffffd8069c4b730,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd8069c4b718,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd8069c4b718,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd805d9b2d90,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd805d9b2d90,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff80003c4f3018) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
namei(ffff80003c4f3018) at namei+0x7aa sys/kern/vfs_lookup.c:250
unp_connect(ffff8000015085a0,fffffd807349ab00,ffff80003c4e7220) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868
uipc_dgram_send(ffff8000015085a0,fffffd805dcb6200,fffffd807349ab00,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607
sosend(ffff8000015085a0,fffffd807349ab00,ffff80003c4f3298,0,0,8) at sosend+0x804
sendit(ffff80003c4e7220,3,ffff80003c4f3410,8,ffff80003c4f34d0) at sendit+0x721 sys/kern/uipc_syscalls.c:779
sys_sendmsg(ffff80003c4e7220,ffff80003c4f3580,ffff80003c4f34d0) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597
syscall(ffff80003c4f3580) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4f3580) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x475c3d47e40, count: -15