In case cpu_schedule_up() is failing to allocate memory for struct sched_resource, cpu_schedule_down() will be called with the sched_resource pointer being NULL. This needs to be handled.
Reported-by: Jan Beulich <[email protected]> Fixes: 207589dbacd4 ("xen/sched: move per cpu scheduler private data into struct sched_resource") Signed-off-by: Juergen Gross <[email protected]> --- xen/common/sched/core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/xen/common/sched/core.c b/xen/common/sched/core.c index d84b65f197..0dc86b8f6c 100644 --- a/xen/common/sched/core.c +++ b/xen/common/sched/core.c @@ -2829,6 +2829,8 @@ static void cpu_schedule_down(unsigned int cpu) rcu_read_lock(&sched_res_rculock); sr = get_sched_res(cpu); + if ( !sr ) + goto out; kill_timer(&sr->s_timer); @@ -2839,6 +2841,7 @@ static void cpu_schedule_down(unsigned int cpu) sr->sched_unit_idle = NULL; call_rcu(&sr->rcu, sched_res_free); + out: rcu_read_unlock(&sched_res_rculock); } -- 2.35.3
