Why am I getting "libz.so.1: failed to map segment from shared object" error in Docker?

This article applies to all MetaDefender Software Supply Chain releases deployed on Linux systems.

Issue:

MetaDefender Software Supply Chain encountered an error when interacting with "docker-compose": Error while loading shared libraries: libz.so.1: failed to map segment from shared object: Operation not permitted

Cause:

If the /tmp mount is on restricted access and with noexec flag, it interferes with docker-compose requirement of exec mode for /tmp directory. More details here (external link to GitHub).

Double check if the /tmp mount currently has the noexec flag:

  • findmnt -l | grep tmp

Resolution:

To resolve this issue, if the /tmp mount does have the noexec flag, perform the following steps:

  1. Run the following command to re-mount the /tmp and give it execute permission:

    • sudo mount /tmp -o remount,exec

  2. Restart the MetaDefender Software Supply Chain service: sudo mdssc -c restart

If Further Assistance is required, please proceed to log a support case or chat with our support engineer.
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Why am I getting "libz.so.1: failed to map segment from shared object" error in Docker?