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Date: Sat, 18 Jun 2016 22:32:23 +0200
From: Karl Böhlmark <>
Subject: abort() fails to terminate PID 1 process


After running alpine-linux based docker containers for a while we noticed
some problematic behaviour when one of our services had a memory leak
causing the process to abort.

Instead of getting abnormal process termination we were seeing the process
hanging at 100% cpu.

A minimal reproduction of this issue is to run

#include <stdlib.h>
int main ()

with "unshare --fork --pid" so that it runs as PID 1 in it's own PID

Would it be reasonable to add a fallback strategy in abort() for
terminating processes when the signals don't have any effect?


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