uvm_fault(fffffd806bc93020,1012dc15000,0,2) at uvm_fault+0x1ee sys/uvm/uvm_fault.c:691
upageflttrap(ffff8000348a68a0,1012dc15000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff8000348a68a0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x78277e027d10, 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(fffffd806e5960c8,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806e5960b0,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806e5960b0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd8065396118,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd8065396118,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd8065396118,fffffd8065396040,0,0,200,0,c386982d927df758) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd8065396118,fffffd8065396040,ffff8000ffff8a60) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd807aa89b00,ec,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086
soreceive(ffff800001443590,ffff80003c5145e8,ffff80003c514598,0,ffff80003c5145d8,ffff80003c51475c,23b2ac0cc9f6e0b2) at soreceive+0xc73 sys/kern/uipc_socket.c:1021
recvit(ffff8000ffff8a60,5,ffff80003c514730,0,ffff80003c5147e0) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff8000ffff8a60,ffff80003c514890,ffff80003c5147e0) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff80003c514890) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c514890) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa53fe9ef8f0, count: -14