Since revision 1.333 of kern_sig.c no longer uses P_WEXIT, the change opened a race window which can cause memory leak in signal queue. Here we free memory for signal queue when process state is set to PRS_ZOMBIE.
Since revision 1.333 of kern_sig.c no longer uses P_WEXIT, the change
opened a race window which can cause memory leak in signal queue.
Here we free memory for signal queue when process state is set to
PRS_ZOMBIE.

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