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identify_descriptor() computes a string descriptor size from desc->string.length. Require the descriptor to contain the fixed string descriptor header before reading the variable string length. The existing descriptor-size check then reports the short descriptor. Signed-off-by: Pengpeng Hou <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>