uvm_fault(fffffd006a3985d0,65563dca000,0,4) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1
upageflttrap(ffff80003c44dca0,65563dca200) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c44dca0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7ece11f86f50, 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(fffffd006d7efe98,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd006d7efe80,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd006d7efe80,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd006d8f71c0,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd006d8f71c0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:576
vn_closefile(fffffd0065850740,ffff80003c3a87e8) at vn_closefile+0x111 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd0065850740,ffff80003c3a87e8) at vn_closefile+0x111 sys/kern/vfs_vnops.c:621
fdrop(fffffd0065850740,ffff80003c3a87e8) at fdrop+0x121 sys/kern/kern_descrip.c:1281
knote_remove(ffff80003c3a87e8,fffffd006d1390e0,fffffd006d139170,6,0) at knote_remove+0x368 sys/kern/kern_event.c:2186
knote_fdclose(ffff80003c3a87e8,6) at knote_fdclose+0xf9 sys/kern/kern_event.c:2221
fdrelease(ffff80003c3a87e8,6) at fdrelease+0xf9 sys/kern/kern_descrip.c:761
sys_closefrom(ffff80003c3a87e8,ffff80003c40bba0,ffff80003c40baf0) at sys_closefrom+0x13c sys/kern/kern_descrip.c:1471
syscall(ffff80003c40bba0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c40bba0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xd3b633ea5d0, count: -14