The following commit has been merged into the sched/core branch of tip: Commit-ID: e972d92d52a1f691498add14feb2ee5902d02404 Gitweb: https://git.kernel.org/tip/e972d92d52a1f691498add14feb2ee5902d02404 Author: Dietmar Eggemann <dietmar.eggemann@xxxxxxx> AuthorDate: Mon, 01 Feb 2021 10:53:53 +01:00 Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CommitterDate: Mon, 01 Feb 2021 15:31:39 +01:00 sched/topology: Fix sched_domain_topology_level alloc in sched_init_numa() Commit "sched/topology: Make sched_init_numa() use a set for the deduplicating sort" allocates 'i + nr_levels (level)' instead of 'i + nr_levels + 1' sched_domain_topology_level. This led to an Oops (on Arm64 juno with CONFIG_SCHED_DEBUG): sched_init_domains build_sched_domains() __free_domain_allocs() __sdt_free() { ... for_each_sd_topology(tl) ... sd = *per_cpu_ptr(sdd->sd, j); <-- ... } Signed-off-by: Dietmar Eggemann <dietmar.eggemann@xxxxxxx> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Tested-by: Vincent Guittot <vincent.guittot@xxxxxxxxxx> Tested-by: Barry Song <song.bao.hua@xxxxxxxxxxxxx> Link: https://lkml.kernel.org/r/6000e39e-7d28-c360-9cd6-8798fd22a9bf@xxxxxxx --- kernel/sched/topology.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index bf5c9bd..09d3504 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -1702,7 +1702,7 @@ void sched_init_numa(void) /* Compute default topology size */ for (i = 0; sched_domain_topology[i].mask; i++); - tl = kzalloc((i + nr_levels) * + tl = kzalloc((i + nr_levels + 1) * sizeof(struct sched_domain_topology_level), GFP_KERNEL); if (!tl) return;