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Reach outside of sandboxfs #79

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Globegitter opened this issue Apr 3, 2019 · 2 comments
Closed

Reach outside of sandboxfs #79

Globegitter opened this issue Apr 3, 2019 · 2 comments

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@Globegitter
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Globegitter commented Apr 3, 2019 •
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I am just debugging a nodejs rule that seems to behave in a non-hermetic way (see bazel-contrib/rules_nodejs#612 if you are interested in background) and I thought sandboxfs can help me there with greater hermeticity, but the rule still behaves exactly the same way. So my question, given an absolute path is it still possible to access the filesystem outside of sandboxfs? And if so is there some way of blocking this?
@jmmv
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jmmv commented Apr 3, 2019

Yes, it's possible to reach absolute paths because sandboxfs does not actually do sandboxing. Grr, the name of this project is wrong...

See Bazel's --sandbox_block_path, which may help you.

@jmmv jmmv closed this as completed Apr 3, 2019
@Globegitter
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I guess indirectly it helps, at least in the Bazel case, by not using symlinks anymore but yes names are hard. And thanks for the pointer to the flag.

@Globegitter Globegitter mentioned this issue Apr 3, 2019
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@jmmv @Globegitter