[X/B/D/E/F] CVE-2020-11565

Thadeu Lima de Souza Cascardo cascardo at canonical.com
Thu Apr 16 20:01:11 UTC 2020

This was built and tested on Xenial 4.4 kernel.

An invalid mpol option when mounting a tmpfs might cause a crash.

[Test case]
mount -t tmpfs -o mpol=prefer:, none /mnt
Printint out the options, usually by cat /proc/self/mountinfo, is needed
to cause the crash.

[Regression potential]
Will cause mounting to fail when it could cause a crash before. So,
hardly worse.

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