Slab poisoning gave me a General Protection Fault on the atomic_dec(&__task_cred(p)->user->processes); line of release_task() called from wait_task_zombie(), every time my dd to USB testing generated a memcg OOM. oom_kill_process() now does the put_task_struct(), mem_cgroup_out_of_memory() should not repeat it. Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx> --- mm/memcontrol.c | 1 - 1 file changed, 1 deletion(-) --- mmotm/mm/memcontrol.c 2012-07-11 14:50:29.808349013 -0700 +++ linux/mm/memcontrol.c 2012-07-15 12:21:26.234289161 -0700 @@ -1533,7 +1533,6 @@ void mem_cgroup_out_of_memory(struct mem points = chosen_points * 1000 / totalpages; oom_kill_process(chosen, gfp_mask, order, points, totalpages, memcg, NULL, "Memory cgroup out of memory"); - put_task_struct(chosen); } static unsigned long mem_cgroup_reclaim(struct mem_cgroup *memcg, -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>