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-rw-r--r--arch/x86/kernel/ptrace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 734549492a18..dc4d27000aa3 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -374,7 +374,7 @@ static unsigned long task_seg_base(struct task_struct *task,
*/
mutex_lock(&task->mm->context.lock);
ldt = task->mm->context.ldt;
- if (unlikely(idx >= ldt->nr_entries))
+ if (unlikely(!ldt || idx >= ldt->nr_entries))
base = 0;
else
base = get_desc_base(ldt->entries + idx);