fbdev: sbuslib: integer overflow in sbusfb_ioctl_helper()
The "index + count" addition can overflow. Both come directly from the user. This bug leads to an information leak. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Peter Malone <peter.malone@gmail.com> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Mathieu Malaterre <malat@debian.org> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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