Fix dissection of Get Info requests.

If the length of the input buffer is zero, it means there *is* no input
buffer; don't use the offset of that buffer plus the length as the
offset past the end of the end of the packet, as both will probably be
zero.  Also, for a request to get quota info, report a warning if
there's no input buffer, as MS-SMB2 seems to say there must be one.

If the length of the input buffer is *not* zero, ignore the iput buffer
for requests other than requests to get quota info or full extended
attribute info, as MS-SMB2 says a server should do that.  Otherwise,
make sure the offset of the input buffer is past the end of the
fixed-length part of the request and the offset+length doesn't overflow
or go past the end of the message.

While we're at it, for some routines that return a "next offset", use
that return value rather than wiring in the length in the caller.

Bug: 12954
Change-Id: If3d8846f5e03d0d7cdfe10ddfacb347bd0915a5a
Reviewed-on: https://code.wireshark.org/review/20874
Reviewed-by: Guy Harris <guy@alum.mit.edu>

0 files changed, 0 insertions, 0 deletions