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The subsequent calculation of port_rate = speed * 1000 * BYTES_PER_KBIT, where the BYTES_PER_KBIT is of type LL, may cause an overflow. At least when speed = SPEED_20000, the expression to the left of port_rate will be greater than INT_MAX. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Elena Salomatkina <esalomatkina@ispras.ru> Link: https://patch.msgid.link/20241013124529.1043-1-esalomatkina@ispras.ru Signed-off-by: Jakub Kicinski <kuba@kernel.org>