uvm_fault(fffffd800bc57208,e64377a6000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650
upageflttrap(ffff8000387dcc40,e64377a6000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff8000387dcc40) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x77e36edf8420, 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(fffffd806e6b58e8,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806e6b58d0,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806e6b58d0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd806e6b2120,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd806e6b2120,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vn_closefile(fffffd806c7a8228,ffff8000ffffc538) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806c7a8228,ffff8000ffffc538) at vn_closefile+0x111 sys/kern/vfs_vnops.c:615
fdrop(fffffd806c7a8228,ffff8000ffffc538) at fdrop+0x121 sys/kern/kern_descrip.c:1281
knote_remove(ffff8000ffffc538,fffffd806f5a48c0,fffffd806f5a4950,7,0) at knote_remove+0x368 sys/kern/kern_event.c:2168
knote_fdclose(ffff8000ffffc538,7) at knote_fdclose+0xf9 sys/kern/kern_event.c:2203
fdrelease(ffff8000ffffc538,7) at fdrelease+0xf9 sys/kern/kern_descrip.c:761
syscall(ffff80003c3f9450) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3f9450) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2e7defba5c0, count: -13