From: Vincent Guittot <vincent.guit...@linaro.org> commit c515db8cd311ef77b2dc7cbd6b695022655bb0f3 upstream.
Jet Chen has reported a kernel panics when booting qemu-system-x86_64 with kvm64 cpu. A panic occured while building the sched_domain. In sched_init_numa, we create a new topology table in which both default levels and numa levels are copied. The last row of the table must have a null pointer in the mask field. The current implementation doesn't add this last row in the computation of the table size. So we add 1 row in the allocation size that will be used as the last row of the table. The kzalloc will ensure that the mask field is NULL. Reported-by: Jet Chen <jet.c...@intel.com> Tested-by: Jet Chen <jet.c...@intel.com> Signed-off-by: Vincent Guittot <vincent.guit...@linaro.org> Signed-off-by: Peter Zijlstra <pet...@infradead.org> Cc: fengguang...@intel.com Link: http://lkml.kernel.org/r/1399972261-25693-1-git-send-email-vincent.guit...@linaro.org Signed-off-by: Ingo Molnar <mi...@kernel.org> Signed-off-by: Andrey Ryabinin <aryabi...@odin.com> --- kernel/sched/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index bbb6fc3..0358edd 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6829,7 +6829,7 @@ static void sched_init_numa(void) /* Compute default topology size */ for (i = 0; sched_domain_topology[i].mask; i++); - tl = kzalloc((i + level) * + tl = kzalloc((i + level + 1) * sizeof(struct sched_domain_topology_level), GFP_KERNEL); if (!tl) return; -- 2.4.6 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
