uvm_fault(fffffd805e8f3208,3cb3b7d1000,0,4) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80003c46f1c0,3cb3b7d14f0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c46f1c0) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7ae8519b8d10, count: -15
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(fffffd806e079538,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806e079520,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:232
rrw_enter(fffffd806e079520,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:605
VOP_LOCK(fffffd806e07a3a8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527
vn_lock(fffffd806e07a3a8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vn_closefile(fffffd806c095840,ffff80003c43dc58) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806c095840,ffff80003c43dc58) at vn_closefile+0x111 sys/kern/vfs_vnops.c:615
fdrop(fffffd806c095840,ffff80003c43dc58) at fdrop+0x126 sys/kern/kern_descrip.c:1267
knote_remove(ffff80003c43dc58,fffffd806f3c7540,fffffd806f3c75d0,3,0) at knote_remove+0x403 sys/kern/kern_event.c:2168
knote_fdclose(ffff80003c43dc58,3) at knote_fdclose+0xf9 sys/kern/kern_event.c:2203
fdrelease(ffff80003c43dc58,3) at fdrelease+0xf9 sys/kern/kern_descrip.c:750
syscall(ffff80002a31f500) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a31f500) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x3be82b44450, count: -13