uvm_fault(fffffd806c4c0e18,efb03901000,0,1) at uvm_fault+0x1e0 sys/uvm/uvm_fault.c:622
upageflttrap(ffff800034b8bfa0,efb03901000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff800034b8bfa0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74c36abe6ec0, count: -12
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(fffffd806dde53d8,9,0) at witness_checkorder+0x1047
rw_enter(fffffd806dde53c8,1) at rw_enter+0x122
rrw_enter(fffffd806dde53c8,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464
VOP_LOCK(fffffd8078c2a798,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd8078c2a798,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564
vfs_getcwd_common(fffffd8078c2a798,fffffd8078c2a6c0,0,0,200,0,4866a3c7c390a2b3) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd8078c2a798,fffffd8078c2a6c0,ffff8000fffeca50) at vn_isunder+0x56 sys/kern/vfs_vnops.c:688
unp_externalize(fffffd8069188700,ec,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1094
soreceive(ffff800010fde018,ffff8000372862a8,ffff800037286258,0,ffff800037286298,ffff80003728641c,41732cabd33ec058) at soreceive+0xd3e sys/kern/uipc_socket.c:1090
recvit(ffff8000fffeca50,7,ffff8000372863f0,0,ffff8000372864a0) at recvit+0x40a sys/kern/uipc_syscalls.c:1079
sys_recvmsg(ffff8000fffeca50,ffff800037286550,ffff8000372864a0) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:879
syscall(ffff800037286550) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff800037286550) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xefa64112810, count: -14