|author||Mike Frysinger <firstname.lastname@example.org>||Thu Aug 23 15:43:15 2018 -0400|
|committer||Treehugger Robot <email@example.com>||Thu Aug 30 00:10:27 2018 +0000|
minijail0: change default mount settings for tmpfs mounts The default tmpfs mount settings are mode=1777 and size=50% (of total RAM) which is way too unsafe for defaults. Considering how users of minijail use tmpfs (to get a small writable directory mount to do bind mounts under it), we should change the default to something much more sane like mode=755 and size=10M. This also matches the usage in CrOS. If people want to use other settings for tmpfs, they can specify them explicitly instead. Bug: chromium:873216 Change-Id: I73ac540500ecff86e8f8d2d7b82e6efb52dc2518
The Minijail homepage and main repo is https://android.googlesource.com/platform/external/minijail/.
There might be other copies floating around, but this is the official one!
Minijail is a sandboxing and containment tool used in Chrome OS and Android. It provides an executable that can be used to launch and sandbox other programs, and a library that can be used by code to sandbox itself.
git clone away from happiness.
$ git clone https://android.googlesource.com/platform/external/minijail $ cd minijail
Releases are tagged as
See the HACKING.md document for more details.
See the RELEASE.md document for more details.
We've got a couple of contact points.
The following talk serves as a good introduction to Minijail and how it can be used.
The Chromium OS project has a comprehensive sandboxing document that is largely based on Minijail.
After you play with the simple examples below, you should check that out.
# id uid=0(root) gid=0(root) groups=0(root),128(pkcs11) # minijail0 -u jorgelo -g 5000 /usr/bin/id uid=72178(jorgelo) gid=5000(eng) groups=5000(eng)
# minijail0 -u jorgelo -c 3000 -- /bin/cat /proc/self/status Name: cat ... CapInh: 0000000000003000 CapPrm: 0000000000003000 CapEff: 0000000000003000 CapBnd: 0000000000003000