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[PATCH 5/5] vm/vm_fault.c: check if active_threads is NULL
From: |
Marin Ramesa |
Subject: |
[PATCH 5/5] vm/vm_fault.c: check if active_threads is NULL |
Date: |
Tue, 19 Nov 2013 07:34:23 +0100 |
Check if active_threads is NULL before calling current_task() to
avoid dereference of null pointer.
* vm/vm_fault.c (active_threads): Check if it's NULL.
---
vm/vm_fault.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/vm/vm_fault.c b/vm/vm_fault.c
index 1089491..b8be122 100644
--- a/vm/vm_fault.c
+++ b/vm/vm_fault.c
@@ -550,7 +550,8 @@ vm_fault_return_t vm_fault_page(first_object, first_offset,
if (m->inactive) {
vm_stat_sample(SAMPLED_PC_VM_REACTIVATION_FAULTS);
vm_stat.reactivations++;
- current_task()->reactivations++;
+ if (active_threads[(0)] != NULL)
+ current_task()->reactivations++;
}
VM_PAGE_QUEUES_REMOVE(m);
--
1.8.1.4