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Date: Mon, 23 Mar 2020 17:10:40 +0100
From: Julio Guerra <>
Cc: Vladimir de Turckheim <>
Subject: [Bug] Do not ignore membarrier return code


The implementation of dlopen() uses membarrier() ( while
currently forbidden by the default docker seccomp profile.

I perfectly understand that it's on docker's end and I suggested them to
add it in this PR <> but such a
critical syscall shouldn't be silently ignored. And it for example leads to
random segfaults on nodejs. I also saw opened qemu issues related to
membarrier + alpine.

dlopen() should therefore fail when membarrier fails (ie. in this case
0) != 0).

Happy to provide the patch if agreed!
All the best,
Julio Guerra

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