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When exporting input device bitmaps via compat_ioctl on BIG_ENDIAN platforms evdev calculates data size incorrectly. This causes buffer overflow if user specifies buffer smaller than maxlen. Signed-off-by: Kenichi Nagai <kenichi3.nagai@toshiba.co.jp> Signed-off-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>