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[ Upstream commit 130f634da1 ]
Function qtnf_event_handle_external_auth calls memcpy without
checking the length.
A user could control that length and trigger a buffer overflow.
Fix by checking the length is within the maximum allowed size.
Signed-off-by: Lee Gibson <leegib@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210419145842.345787-1-leegib@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>