K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2018-01-02T18:31:32.851030Z
K 7
svn:log
V 530
hpt{nr,rr}: plug info leak in hpt_ioctl

The hpt{nr,rr} ioctl handler allocates a buffer without M_ZERO and calls
hpt_do_ioctl(), which might not overwrite the entire buffer.

Also zero bytesReturned in case it is not written by hpt_do_ioctl().

The hpt27{nr,rr} device has permissions only for root so this is not urgent,
and the fix can be MFCd and considered for a future EN.

The same issue was reported in the hpt27xx driver by Ilja Van Sprundel.

Reviewed by:	jhb, kib
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation

END