uvm_fault(fffffd80647eb028,da8632b9000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650
upageflttrap(ffff80002a3a8e50,da8632b9000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80002a3a8e50) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x793912200ad0, 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:438
witness_checkorder(fffffd806ea5c7f0,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806ea5c7d8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806ea5c7d8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd805ddc4a48,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd805ddc4a48,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd805ddc4a48,fffffd805c31cb08,0,0,200,0,354dca70028009cf) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd805ddc4a48,fffffd805c31cb08,ffff80003bbe6fc0) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd8066f54900,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff80000174fc88,ffff80003c4e51c8,ffff80003c4e5178,0,ffff80003c4e51b0,ffff80003c4e533c,19d196cc2ece73d6) at soreceive+0xc24 sys/kern/uipc_socket.c:1017
recvit(ffff80003bbe6fc0,4,ffff80003c4e5310,0,ffff80003c4e53c0) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff80003bbe6fc0,ffff80003c4e5470,ffff80003c4e53c0) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80003c4e5470) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4e5470) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x28dde6d6240, count: -14