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-rw-r--r--kernel/sched/fair.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 4603d6cb9e2..5eea8707234 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -793,8 +793,11 @@ unsigned int sysctl_numa_balancing_scan_delay = 1000;
static void task_numa_placement(struct task_struct *p)
{
- int seq = ACCESS_ONCE(p->mm->numa_scan_seq);
+ int seq;
+ if (!p->mm) /* for example, ksmd faulting in a user's mm */
+ return;
+ seq = ACCESS_ONCE(p->mm->numa_scan_seq);
if (p->numa_scan_seq == seq)
return;
p->numa_scan_seq = seq;