uvm_fault(fffffd806bf0ee20,ad54a0f000,0,1) at uvm_fault+0x1e0 sys/uvm/uvm_fault.c:622
upageflttrap(ffff80002a12e3c0,ad54a0f000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80002a12e3c0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7a6d6a09bd00, count: -11
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(fffffd8061ed11b8,9,0) at witness_checkorder+0x1047
rw_enter(fffffd8061ed11a8,1) at rw_enter+0x122
rrw_enter(fffffd8061ed11a8,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464
VOP_LOCK(fffffd807860fa80,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd807860fa80,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564
vfs_getcwd_common(fffffd807860fa80,fffffd807860fa80,0,0,200,0,f56b0da09e313e9d) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd807860fa80,fffffd807860fa80,ffff80003076ecd8) at vn_isunder+0x56 sys/kern/vfs_vnops.c:688
unp_externalize(fffffd8061a61200,f7,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1094
soreceive(ffff80000130f4c0,ffff80003720d4e8,ffff80003720d498,0,ffff80003720d4d8,ffff80003720d65c,3a6c0204a728bf02) at soreceive+0xd3e sys/kern/uipc_socket.c:1090
recvit(ffff80003076ecd8,7,ffff80003720d630,0,ffff80003720d6e0) at recvit+0x40a sys/kern/uipc_syscalls.c:1079
sys_recvmsg(ffff80003076ecd8,ffff80003720d790,ffff80003720d6e0) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:879
syscall(ffff80003720d790) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff80003720d790) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf7cbb5b62c0, count: -14