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cramfs issues #5

@lacraig2

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@lacraig2

Device: https://www.netgear.com/support/product/srx5308/
Firmware test case: https://www.downloads.netgear.com/files/GDC/SRX5308/SRX5308_V4.3.5-3.zip

This firmware is a zip comprised of some release notes and an .img file. The .img file seems to contain a big endian cramfs and cramfs swap file.

The standard version of unblob extracts with 7z and was able to extract something (though it might be off). However, since we switched back to cramfsck in our unblob (for permissions) we do not get these results. rehosting/unblob@2342bb5#diff-b3bc78575514117c5eb5842d6ff70aa11b6f6a105609fcf9ad66afc0eb386b48R44

I don't have a specific solution in mind. I just wanted to flag it.

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