uvm_fault(fffffd806a863d88,98d28e87000,0,4) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80003c4872c0,98d28e87040) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c4872c0) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x98f7be9e6d0, 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(fffffd805f2e9900,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd805f2e98e8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd805f2e98e8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd805f811480,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
vn_lock(fffffd805f811480,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd805f811480,fffffd805f811ea0,0,0,200,0,80ead4c0afe57b02) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd805f811480,fffffd805f811ea0,ffff800039013788) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd80614bcd00,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff800001522928,ffff80003c49f608,ffff80003c49f5b8,0,ffff80003c49f5f0,ffff80003c49f77c,9f1f4873ccc792c7) at soreceive+0xc24 sys/kern/uipc_socket.c:1009
recvit(ffff800039013788,c,ffff80003c49f750,0,ffff80003c49f800) at recvit+0x40b sys/kern/uipc_syscalls.c:1075
sys_recvmsg(ffff800039013788,ffff80003c49f8b0,ffff80003c49f800) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:875
syscall(ffff80003c49f8b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c49f8b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x547f49b2d10, count: -14