uvm_fault(fffffd806c023208,d869e1b9000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80003bbfab40,d869e1b9000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003bbfab40) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0xd8624960870, 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(fffffd806e186340,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806e186328,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806e186328,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd806e1898b8,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
vn_lock(fffffd806e1898b8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vn_closefile(fffffd805ed97948,ffff8000ffff2a78) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd805ed97948,ffff8000ffff2a78) at vn_closefile+0x111 sys/kern/vfs_vnops.c:615
fdrop(fffffd805ed97948,ffff8000ffff2a78) at fdrop+0x121 sys/kern/kern_descrip.c:1280
knote_remove(ffff8000ffff2a78,fffffd805ed5d128,fffffd805ed5d1b8,3,0) at knote_remove+0x449 sys/kern/kern_event.c:2168
knote_fdclose(ffff8000ffff2a78,3) at knote_fdclose+0xf9 sys/kern/kern_event.c:2203
fdrelease(ffff8000ffff2a78,3) at fdrelease+0xf9 sys/kern/kern_descrip.c:760
syscall(ffff80003c4069e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4069e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x8982313d310, count: -13