uvm_fault(fffffd806a1549a8,f66a1bd6000,0,2) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635
upageflttrap(ffff80003c3d2250,f66a1bd64e8) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c3d2250) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x741a8b254a70, 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:438
witness_checkorder(fffffd805fc5d568,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd805fc5d550,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd805fc5d550,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd80676122d8,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd80676122d8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:576
vfs_getcwd_common(fffffd80676122d8,fffffd806a06b630,0,0,200,0,cbc3df52ff8d1bd9) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd80676122d8,fffffd806a06b630,ffff80002a2407e0) at vn_isunder+0x56 sys/kern/vfs_vnops.c:700
unp_externalize(fffffd806d445700,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff80000161d1b8,ffff80003c3c61b8,ffff80003c3c6168,0,ffff80003c3c61a0,ffff80003c3c632c,919ea46b1cb6c501) at soreceive+0xc24 sys/kern/uipc_socket.c:1029
recvit(ffff80002a2407e0,4,ffff80003c3c6300,0,ffff80003c3c63b0) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff80002a2407e0,ffff80003c3c6460,ffff80003c3c63b0) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80003c3c6460) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3c6460) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5de2e55da80, count: -14