drivers/ptp: Fix kernel memory disclosure
The reserved field precise_offset->rsv is not cleared before being copied to user space, leaking kernel stack memory. Clear the struct before it's copied. Signed-off-by:Vlad Tsyrklevich <vlad@tsyrklevich.net> Acked-by:
Richard Cochran <richardcochran@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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