uvm_fault(fffffd800d9093f0,eefb2795000,0,4) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80003c3e7ef0,eefb2795a30) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c3e7ef0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7a734b1f7a80, 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(fffffd806c39b0c8,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806c39b0b0,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806c39b0b0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd8064b427b0,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd8064b427b0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:576
vfs_getcwd_common(fffffd8064b427b0,fffffd8064b42be8,0,0,200,0,5b0af6f02f236ad1) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd8064b427b0,fffffd8064b42be8,ffff80003c49f4f8) at vn_isunder+0x56 sys/kern/vfs_vnops.c:700
unp_externalize(fffffd806ca78a00,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff8000016877c0,ffff80003c404ca8,ffff80003c404c58,0,ffff80003c404c90,ffff80003c404e1c,3ce0d45c01e6747d) at soreceive+0xc24 sys/kern/uipc_socket.c:1029
recvit(ffff80003c49f4f8,1,ffff80003c404df0,0,ffff80003c404ea0) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff80003c49f4f8,ffff80003c404f50,ffff80003c404ea0) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80003c404f50) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c404f50) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x41b615f7580, count: -14