uvm_fault(fffffd80696593f8,af0fb7ac000,0,2) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650
upageflttrap(ffff80003b7e4370,af0fb7ac000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003b7e4370) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x76d26b02daf0, 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(fffffd80698c7330,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd80698c7318,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd80698c7318,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd806709c520,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd806709c520,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd806709c520,fffffd806709c7a8,0,0,200,0,160ae289196c8a0a) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd806709c520,fffffd806709c7a8,ffff8000fffea7e8) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd805dc8a700,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff800010fda668,ffff80002a27bf28,ffff80002a27bed8,0,ffff80002a27bf10,ffff80002a27c09c,32a814819861d981) at soreceive+0xc24 sys/kern/uipc_socket.c:1029
recvit(ffff8000fffea7e8,4,ffff80002a27c070,0,ffff80002a27c120) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff8000fffea7e8,ffff80002a27c1d0,ffff80002a27c120) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80002a27c1d0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a27c1d0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb5455f0f050, count: -14