uvm_fault(fffffd806b8f77c8,feb77412000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80003c445ed0,feb77412988) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c445ed0) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7ee86c9691b0, count: -17
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(fffffd806b9fbd98,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806b9fbd80,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806b9fbd80,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd80650826f8,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
vn_lock(fffffd80650826f8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd80650826f8,fffffd80650821e8,0,0,200,0,ae246829ac4bd8d4) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd80650826f8,fffffd80650821e8,ffff800031800d20) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806ead2700,f0,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff800001562110,ffff80003c46d288,ffff80003c46d238,0,ffff80003c46d270,ffff80003c46d3fc,28425e365c95ffe4) at soreceive+0xc24 sys/kern/uipc_socket.c:1009
recvit(ffff800031800d20,7,ffff80003c46d3d0,0,ffff80003c46d480) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff800031800d20,ffff80003c46d530,ffff80003c46d480) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80003c46d530) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c46d530) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7e100714f70, count: -14