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dcbnl: fix various netlink info leaks
The dcb netlink interface leaks stack memory in various places: * perm_addr buffer is only filled at max with 12 of the 32 bytes but copied completely, * no in-kernel driver fills all fields of an IEEE 802.1Qaz subcommand, so we're leaking up to 58 bytes for ieee_ets structs, up to 136 bytes for ieee_pfc structs, etc., * the same is true for CEE -- no in-kernel driver fills the whole struct, Prevent all of the above stack info leaks by properly initializing the buffers/structures involved. Signed-off-by: Mathias Krause <firstname.lastname@example.org> Signed-off-by: David S. Miller <email@example.com>
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