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>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'