uvm_fault(fffffd806ad599a0,57bd6fb2000,0,2) at uvm_fault+0x159 sys/uvm/uvm_fault.c:682
upageflttrap(ffff80002a2e5e60,57bd6fb2000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80002a2e5e60) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:603
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x77f6d8a4bd40, count: -13
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(fffffd806e0db6b8,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806e0db6a0,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806e0db6a0,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd806e0da8b8,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
vn_lock(fffffd806e0da8b8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vn_closefile(fffffd8063f61e18,ffff80003201e560) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd8063f61e18,ffff80003201e560) at vn_closefile+0x111 sys/kern/vfs_vnops.c:615
fdrop(fffffd8063f61e18,ffff80003201e560) at fdrop+0x121 sys/kern/kern_descrip.c:1280
knote_drop(fffffd8064031c30,ffff80003201e560) at knote_drop+0x1a1 sys/kern/kern_event.c:2296
knote_remove(ffff80003201e560,fffffd806ef1e460,fffffd806ef1e4f0,6,0) at knote_remove+0x2f6 sys/kern/kern_event.c:2180
knote_fdclose(ffff80003201e560,6) at knote_fdclose+0xf9 sys/kern/kern_event.c:2203
fdrelease(ffff80003201e560,6) at fdrelease+0xf9 sys/kern/kern_descrip.c:760
syscall(ffff80003c4add10) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4add10) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd8dfc5fc410, count: -14