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Alec Brown
c76a07e15f
In the function grub_cryptodisk_endecrypt(), a for loop is incrementing the variable i by (1U << log_sector_size). The variable i is of type grub_size_t which is a 64-bit unsigned integer on x86_64 architecture. On the other hand, 1U is a 32-bit unsigned integer. By performing a left shift on a 32-bit value and assigning it to a 64-bit variable, the 64-bit variable may have incorrect values in the high 32-bits if the shift has an overflow. To avoid this, we replace 1U with (grub_size_t)1. Fixes: CID 307788 Signed-off-by: Alec Brown <alec.r.brown@oracle.com> Reviewed-by: Darren Kenny <darren.kenny@oracle.com> Reviewed-by: Patrick Steinhardt <ps@pks.im> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>