mem_cgroup_get_limit() returns a byte limit as a unsigned 64 bit value, which is converted to a page count by mem_cgroup_out_of_memory(). Prior to this patch the conversion could overflow on 32 bit platforms yielding a limit of zero. Signed-off-by: Greg Thelen <gthelen@xxxxxxxxxx> --- mm/oom_kill.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 7dcca55..3fcac51 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -538,7 +538,7 @@ void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask) struct task_struct *p; check_panic_on_oom(CONSTRAINT_MEMCG, gfp_mask, 0, NULL); - limit = mem_cgroup_get_limit(mem) >> PAGE_SHIFT; + limit = min(mem_cgroup_get_limit(mem) >> PAGE_SHIFT, (u64)ULONG_MAX); read_lock(&tasklist_lock); retry: p = select_bad_process(&points, limit, mem, NULL); -- 1.7.3.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>