fix CVE-2019-5736 by using as less memory as possible #1987
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Signed-off-by: Lifubang <[email protected]> Signed-off-by: lifubang <[email protected]>
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cyphar
reviewed
Feb 23, 2019
| return "", err | ||
| } | ||
| id := uuid.New() | ||
| temp := fmt.Sprintf("/tmp/runc.%s", id) |
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If we're going to do it this way, I would want to use memfd_create because using /tmp won't always work and memfd_create is a fool-proof way of doing it. But ultimately I could just rewrite #1984 entirely to not use C code.
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#1984 now makes this no longer relevant -- since by default we try doing a read-only bind-mount which takes up no memory or storage (which is better than this approach). |
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I'm a code fan of opencontainers/runc project.
And my business is
Online Judge (OJ), which is based on docker.To ensure fairness of the OJ examination, we need to use memory limit with 4m, 5m, or 10m.
So, I need to fix
CVE-2019-5736by using as less memory as possible.I open this PR to figure out my solution by using code, because my English is very poor.
My solution is to copy a new runc binary file with a random name before we start to run
runc initcommand. And delete it afterrunc initstarted.If there is a problem, please point out and discuss it.
Thanks.
Signed-off-by: Lifubang [email protected]