uvm_fault(fffffd806a91ead0,110c277000,0,1) at uvm_fault+0x272
upageflttrap(ffff80003c539b10,110c2773ce) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80003c539b10) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x76a0db3b76e0, 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(fffffd806dd10ba8,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806dd10b90,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806dd10b90,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd806dd11c18,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd806dd11c18,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vn_closefile(fffffd806bdd71e0,ffff80003c4e6f88) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806bdd71e0,ffff80003c4e6f88) at vn_closefile+0x111 sys/kern/vfs_vnops.c:615
fdrop(fffffd806bdd71e0,ffff80003c4e6f88) at fdrop+0x126 sys/kern/kern_descrip.c:1265
knote_remove(ffff80003c4e6f88,fffffd806ea8faf8,fffffd806ea8fb80,3,0) at knote_remove+0x403 sys/kern/kern_event.c:2014
knote_fdclose(ffff80003c4e6f88,3) at knote_fdclose+0xf9 sys/kern/kern_event.c:2049
fdrelease(ffff80003c4e6f88,3) at fdrelease+0xf9 sys/kern/kern_descrip.c:749
syscall(ffff80003a0ce420) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003a0ce420) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe0b29243350, count: -13