Kernel Modules Corrupt extraction mi424wr rev I about binwalk HOT 3 CLOSED

The cramfs extraction issue is actually a bug in the Firmware-Mod-Kit extractor that binwalk uses; I'll open a bug there and address it ASAP. In the meantime, you can extract the cramfs image containing the kernel modules manually:

 $ mkdir cramfs-modules
 $ /opt/firmware-mod-kit/src/uncramfs-lzma/uncramfs-lzma cramfs-modules/ 489000.cramfs

As for the RomFS file system, I don't see any indication that there is one in the firmware image you linked to. The two CramFS images are definitely valid CramFS images, and further manual analysis does not turn up the RomFS magic bytes ("-rom1fs-"), nor does it turn up any obvious sections of the firmware that binwalk may have missed. There is a compressed CPIO archive that binwalk extracts though, if that is what you're looking for.

from binwalk.

Thanks, that worked. I guess it wasn't romfs after all, it had looked to me like there was one somewhere from playing around with telnet on the router, but I may have been wrong. There was also a genromfs package in the gpl source(source is incomplete). Then again maybe there is a romfs only on the device itself and not in the firmware downloads. This is everything I was able to extract https://github.com/Lightsword1942/jungo-image/tree/master/_MI424WR-GEN3I.rmt.extracted does it look like I missed anything?

from binwalk.

I've updated the firmware-mod-kit repository with some changes that fix this issue; binwalk -Me now extracts everything properly.

Yes, what you have extracted appears to be everything that's in the firmware image. It could very well be that the romfs image was not included in this firmware update; the jffs2 image is also not present, although that's not unexpected since it's probably used to store run time configuration data.

from binwalk.