Originally posted by S.Pam
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At present SMB/CIFS is in userland. There is a difference between a protocol flaw and an implementation flaw. The SMB_v1 protocol (which samba would actually help spread if you remember) had a flaw and this known flaw is not present in SMB_v2 or SMB_v3.
The implementation at present on Linux is via Samba, to move this into the kernel should improve performance, however this is brand new so if there is an implementation bug it will now be a kernel exploit. Like all such kernel-based drivers, it must be evaluated
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