uvm_fault(fffffd8067519ad0,d05e958f000,0,1) at uvm_fault+0x1ee sys/uvm/uvm_fault.c:691
upageflttrap(ffff80002f09ce70,d05e958f000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80002f09ce70) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x79354e93b3d0, count: -11
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:437
witness_checkorder(fffffd806de4a630,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806de4a618,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806de4a618,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd806de4bc18,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd806de4bc18,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vn_closefile(fffffd806bebe868,ffff80002a37e540) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806bebe868,ffff80002a37e540) at vn_closefile+0x111 sys/kern/vfs_vnops.c:615
fdrop(fffffd806bebe868,ffff80002a37e540) at fdrop+0x126 sys/kern/kern_descrip.c:1265
knote_remove(ffff80002a37e540,fffffd806ecb1438,fffffd806ecb14c0,3,0) at knote_remove+0x403 sys/kern/kern_event.c:2014
knote_fdclose(ffff80002a37e540,3) at knote_fdclose+0xf9 sys/kern/kern_event.c:2049
fdrelease(ffff80002a37e540,3) at fdrelease+0xf9 sys/kern/kern_descrip.c:749
syscall(ffff80003c4be4a0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4be4a0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4ff2392990, count: -13