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hc
2023-11-20 2e7bd41e4e8ab3d1efdabd9e263a2f7fe79bff8c 
 kernel/fs/exec.c
....@@ -1028,6 +1028,7 @@
10281028 		}
10291029 	}
10301030 	task_lock(tsk);
1031
+	preempt_disable_rt();
10311032 
10321033 	local_irq_disable();
10331034 	active_mm = tsk->active_mm;
....@@ -1047,6 +1048,7 @@
10471048 		local_irq_enable();
10481049 	tsk->mm->vmacache_seqnum = 0;
10491050 	vmacache_flush(tsk);
1051
+	preempt_enable_rt();
10501052 	task_unlock(tsk);
10511053 	if (old_mm) {
10521054 		up_read(&old_mm->mmap_sem);