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Merge pull request #65 from madaidan/userfaultfd

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Restrict the userfaultfd() syscall to root
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Patrick Schleizer 2020-02-29 12:28:32 +00:00 committed by GitHub
commit 453aa8a4eb
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2
debian/control vendored
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@ -125,6 +125,8 @@ Description: enhances misc security settings
Secure Attention Key.
.
* Restricts loading line disciplines to `CAP_SYS_MODULE`.
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* Restricts the `userfaultfd()` syscall to root.
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Improve Entropy Collection
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6
etc/sysctl.d/30_security-misc.conf
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@ -133,3 +133,9 @@ kernel.sysrq=132
##
## https://lkml.org/lkml/2019/4/15/890
dev.tty.ldisc_autoload=0
## Restrict the userfaultfd() syscall to root as it can make heap sprays
## easier.
##
## https://duasynt.com/blog/linux-kernel-heap-spray
vm.unprivileged_userfaultfd=0