uvm_fault(fffffd805c2a1ae0,a1c476c1000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:673
upageflttrap(ffff8000310b9cb0,a1c476c1e20) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff8000310b9cb0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7022e64a7990, 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(fffffd806deff640,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806deff628,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806deff628,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd805c8a45f8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd805c8a45f8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd805c8a45f8,fffffd805c8a4958,0,0,200,0,6522a43663b3f989) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd805c8a45f8,fffffd805c8a4958,ffff80003c510560) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd8077bcbc00,33,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086
soreceive(ffff8000014c75c0,ffff80003c4fee78,ffff80003c4fee28,0,ffff80003c4fee68,ffff80003c4fefec,a7157c7e76f66c03) at soreceive+0xc73 sys/kern/uipc_socket.c:1021
recvit(ffff80003c510560,5,ffff80003c4fefc0,0,ffff80003c4ff070) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff80003c510560,ffff80003c4ff120,ffff80003c4ff070) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff80003c4ff120) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4ff120) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7b1bf2e81d0, count: -14