uvm_fault(ffff800001dc45e0,50588a1c000,0,4) at uvm_fault+0x3ef sys/uvm/uvm_fault.c:657
upageflttrap(ffff80003a32c500,50588a1ca4b) at upageflttrap+0xe0 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003a32c500) at usertrap+0x4f9 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x760fc9ed4ae0, count: -18
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x17:  popq    %rbp
ddb{1}> trace
db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457
witness_checkorder(ffff800001c51340,9,0) at witness_checkorder+0x19db sys/kern/subr_witness.c:-1
rw_do_enter_write(ffff800001c51328,1) at rw_do_enter_write+0xc4 sys/kern/kern_rwlock.c:234
rrw_enter(ffff800001c51328,1) at rrw_enter+0xf0 sys/kern/kern_rwlock.c:621
VOP_LOCK(ffff800001ecab08,2001) at VOP_LOCK+0x17e sys/kern/vfs_vops.c:527
vn_lock(ffff800001ecab08,2001) at vn_lock+0xca sys/kern/vfs_vnops.c:576
vfs_lookup(ffff80002e6e3fa0) at vfs_lookup+0x1f7 sys/kern/vfs_lookup.c:431
namei(ffff80002e6e3fa0) at namei+0xe19 sys/kern/vfs_lookup.c:250
unp_connect(ffff8000110bac78,fffffd80689b2100,ffff800045ff4568) at unp_connect+0x2b9 sys/kern/uipc_usrreq.c:872
uipc_dgram_send(ffff8000110bac78,fffffd8068bf9000,fffffd80689b2100,0) at uipc_dgram_send+0x1f8 sys/kern/uipc_usrreq.c:609
sosend(ffff8000110bac78,fffffd80689b2100,ffff80002e6e4340,0,0,400) at sosend+0xb96 sys/kern/uipc_socket.c:-1
sendit(ffff800045ff4568,5,ffff80002e6e4450,400,ffff80002e6e4620) at sendit+0x83b sys/kern/uipc_syscalls.c:785
sys_sendto(ffff800045ff4568,ffff80002e6e46c0,ffff80002e6e4620) at sys_sendto+0x15c sys/kern/uipc_syscalls.c:563
syscall(ffff80002e6e46c0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002e6e46c0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xda7efd38cd0, count: -15