uvm_fault(fffffd806eb66008,110c288000,0,1) at uvm_fault+0x272
upageflttrap(ffff8000364bcd80,110c288cfd) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff8000364bcd80) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x71c7f3a13580, 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(fffffd806bc19730,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806bc19718,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806bc19718,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd80771fa548,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd80771fa548,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd80771fa548,fffffd80771fa548,0,0,200,0,e7bc2d3815896b38) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd80771fa548,fffffd80771fa548,ffff8000ffff8020) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806613f100,2f,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086
soreceive(ffff80000151c0b0,ffff80002a473fb8,ffff80002a473f68,0,ffff80002a473fa8,ffff80002a47412c,d9442fd3d4cd519f) at soreceive+0xc73 sys/kern/uipc_socket.c:1021
recvit(ffff8000ffff8020,4,ffff80002a474100,0,ffff80002a4741b0) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff8000ffff8020,ffff80002a474260,ffff80002a4741b0) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff80002a474260) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a474260) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x25413c13a70, count: -14