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README: add note about AppArmor constraint on Debian

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Christian Göttsche 2023-12-14 10:36:59 +01:00 committed by Daniel Micay
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@ -159,6 +159,9 @@ line to the `/etc/ld.so.preload` configuration file:
The format of this configuration file is a whitespace-separated list, so it's The format of this configuration file is a whitespace-separated list, so it's
good practice to put each library on a separate line. good practice to put each library on a separate line.
On Debian systems `libhardened_malloc.so` should be installed into `/usr/lib/`
to avoid preload failures caused by AppArmor profile restrictions.
Using the `LD_PRELOAD` environment variable to load it on a case-by-case basis Using the `LD_PRELOAD` environment variable to load it on a case-by-case basis
will not work when `AT_SECURE` is set such as with setuid binaries. It's also will not work when `AT_SECURE` is set such as with setuid binaries. It's also
generally not a recommended approach for production usage. The recommendation generally not a recommended approach for production usage. The recommendation