unkillable process consuming 100% cpu

I haven't seen anyone post about an unkillable process
(even by root), which consumes 100% cpu.

last pid:  4592;  load averages:  1.24,  1.08,  0.74   up 13+20:21:20  12:26:29
68 processes:  2 running, 66 sleeping
CPU:  0.1% user,  0.0% nice, 12.6% system,  0.0% interrupt, 87.2% idle
Mem: 428M Active, 11G Inact, 138M Laundry, 2497M Wired, 1525M Buf, 2377M Free
Swap: 16G Total, 24M Used, 16G Free

  PID USERNAME    THR PRI NICE   SIZE    RES STATE    C   TIME    WCPU COMMAND
69092 kargl         2  45    0   342M   148M CPU2     2  12:51 100.07% chrome


Neither of these have an effect.

kill -1 69092
kill -9 69069

Attempts to attach gdb831 to -p 69092 leads to hung xterm.

-- 
Steve