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tsc can be NULL (mac80211 currently always passes NULL), resulting in NULL-dereference. check before copying it. Cc: stable@vger.kernel.org Signed-off-by: Eliad Peller <eliadx.peller@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>