Difference between revisions of "Compel"
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| Line 7: | Line 7: | ||
* Check socket FDs to get stuck/closed by polling them | * Check socket FDs to get stuck/closed by polling them | ||
* Apply "logrotate" on the fly | * Apply "logrotate" on the fly | ||
| + | * Garbage collector | ||
Another is to do some activity on the victim and then just unload. With this we can | Another is to do some activity on the victim and then just unload. With this we can | ||
| Line 19: | Line 20: | ||
* Force entering into CT (except pid namespace, probably) | * Force entering into CT (except pid namespace, probably) | ||
* Re-open all files (and cwd, root) to facilitate moving on new / (e.g. for disk replacement) | * Re-open all files (and cwd, root) to facilitate moving on new / (e.g. for disk replacement) | ||
| + | * Remove leaks from e.g. malloc/free heap | ||
[[Category:Empty articles]] | [[Category:Empty articles]] | ||
[[Category:Sub-projects]] | [[Category:Sub-projects]] | ||
Revision as of 14:44, 9 February 2016
Usage ideas
One thing parasite code can do is call clone() and create thread having access to main process VM, FDT, FS, etc. The new thread can then
- Check socket FDs to get stuck/closed by polling them
- Apply "logrotate" on the fly
- Garbage collector
Another is to do some activity on the victim and then just unload. With this we can
- Death detection. Open pipe/socket and pass the other end outside. Once the victim dies the pipe/socket will wake up.
- Binary updates. E.g. live patching or libr relink
- Inject socket spy -- instead of opened socket create a unix one, put it in place of original one and send the latter back to caller so that any traffic flow in one goes "through" the spy
- Do "nohup" on the fly
- Debug stuff by MSG_PEEK-ing sockets messages of tee+splice sockets
- Re-connect sleeping sockets to other addresses (not 100% safe)
- "Soft" restart of a service -- call execve() from it's context
- Force entering into CT (except pid namespace, probably)
- Re-open all files (and cwd, root) to facilitate moving on new / (e.g. for disk replacement)
- Remove leaks from e.g. malloc/free heap