uvm_fault(fffffd806bf60c08,8e0cda90000,0,1) at uvm_fault+0x169 sys/uvm/uvm_fault.c:605
upageflttrap(ffff800034b8c1f0,8e0cda90070) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff800034b8c1f0) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7eb357210a60, count: -16
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(fffffd806f46c1b8,9,0) at witness_checkorder+0x1047
rw_enter(fffffd806f46c1a8,1) at rw_enter+0x122
rrw_enter(fffffd806f46c1a8,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464
VOP_LOCK(fffffd806f49e448,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd806f49e448,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564
vn_closefile(fffffd806be67260,ffff8000ffff22a8) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806be67260,ffff8000ffff22a8) at vn_closefile+0x111 sys/kern/vfs_vnops.c:609
fdrop(fffffd806be67260,ffff8000ffff22a8) at fdrop+0x126 sys/kern/kern_descrip.c:1274
knote_remove(ffff8000ffff22a8,fffffd806eb91288,fffffd806eb91310,6,0) at knote_remove+0x403 sys/kern/kern_event.c:2014
knote_fdclose(ffff8000ffff22a8,6) at knote_fdclose+0xf9 sys/kern/kern_event.c:2049
fdrelease(ffff8000ffff22a8,6) at fdrelease+0xf6 sys/kern/kern_descrip.c:758
syscall(ffff8000371c5970) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff8000371c5970) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe4a252b04b0, count: -13