uvm_fault(fffffd806bc72d78,c4b8bc66000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80003c48a6a0,c4b8bc66066) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c48a6a0) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x72acaff14a20, count: -14
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(fffffd806bfe0330,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806bfe0318,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806bfe0318,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd800e577e90,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
vn_lock(fffffd800e577e90,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd800e577e90,fffffd800e577470,0,0,200,0,cc25ff58489a260) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd800e577e90,fffffd800e577470,ffff80002a27e018) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806ceaa200,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff800010fde308,ffff80003c500d18,ffff80003c500cc8,0,ffff80003c500d00,ffff80003c500e8c,30e0f1a3d93917aa) at soreceive+0xc24 sys/kern/uipc_socket.c:1009
recvit(ffff80002a27e018,5,ffff80003c500e60,0,ffff80003c500f10) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff80002a27e018,ffff80003c500fc0,ffff80003c500f10) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80003c500fc0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c500fc0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x78729a88f90, count: -14