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-rw-r--r--mm/oom_kill.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 059e617a1847..26ea8636758f 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -975,6 +975,13 @@ static void oom_kill_process(struct oom_control *oc, const char *message)
* still freeing memory.
*/
read_lock(&tasklist_lock);
+
+ /*
+ * The task 'p' might have already exited before reaching here. The
+ * put_task_struct() will free task_struct 'p' while the loop still try
+ * to access the field of 'p', so, get an extra reference.
+ */
+ get_task_struct(p);
for_each_thread(p, t) {
list_for_each_entry(child, &t->children, sibling) {
unsigned int child_points;
@@ -994,6 +1001,7 @@ static void oom_kill_process(struct oom_control *oc, const char *message)
}
}
}
+ put_task_struct(p);
read_unlock(&tasklist_lock);
/*